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Identification
NameTizanidine
Accession NumberDB00697  (APRD00128)
TypeSmall Molecule
GroupsApproved
DescriptionTizanidine is a short-acting drug for the management of spasticity. Tizanidine is an agonist at a2-adrenergic receptor sites and presumably reduces spasticity by increasing presynaptic inhibition of motor neurons. In animal models, tizanidine has no direct effect on skeletal muscle fibers or the neuromuscular junction, and no major effect on monosynaptic spinal reflexes. The effects of tizanidine are greatest on polysynaptic pathways. The overall effect of these actions is thought to reduce facilitation of spinal motor neurons.
Structure
Thumb
Synonyms
5-Chloro-4-(2-imidazolin-2-ylamino)-2,1,3-benzothiadiazole
Tizanidin
Tizanidina
Tizanidine
Tizanidinum
External Identifiers
  • AN 021
  • DS 103-282
Approved Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing End
Mylan-tizanidineTablet4 mgOralMylan Pharmaceuticals Ulc2006-02-16Not applicableCanada
Pal-tizanidineTablet4 mgOralPaladin Labs Inc1999-10-29Not applicableCanada
TizanidineTablet4 mgOralAa Pharma Inc2004-11-17Not applicableCanada
TizanidineTablet2 mgOralAa Pharma IncNot applicableNot applicableCanada
Tizanidine HydrochlorideCapsule, gelatin coated6 mg/1Oralbryant ranch prepack2012-02-06Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated2 mg/1OralActavis Pharma, Inc.2012-02-06Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated4 mg/1OralActavis Pharma, Inc.2012-02-06Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated6 mg/1OralActavis Pharma, Inc.2012-02-06Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated2 mg/1OralClinical Solutions Wholesale2012-02-06Not applicableUs
ZanaflexCapsule6 mg/1OralSTAT Rx USA LLC2002-08-29Not applicableUs
ZanaflexCapsule4 mg/1OralLake Erie Medical & Surgical Supply DBA Quality Care Products LLC2012-03-28Not applicableUs
ZanaflexCapsule2 mg/1OralAcorda Therapeutics, Inc.2005-04-04Not applicableUs
ZanaflexCapsule4 mg/1OralSTAT Rx USA LLC2002-08-29Not applicableUs
ZanaflexCapsule6 mg/1OralLake Erie Medical & Surgical Supply DBA Quality Care Products LLC2012-03-28Not applicableUs
ZanaflexCapsule4 mg/1OralAcorda Therapeutics, Inc.2005-04-04Not applicableUs
ZanaflexCapsule, gelatin coated4 mg/1OralRebel Distributors Corp2002-08-29Not applicableUs
ZanaflexTablet4 mg/1OralPd Rx Pharmaceuticals, Inc.1997-01-01Not applicableUs
ZanaflexCapsule6 mg/1OralAcorda Therapeutics, Inc.2005-04-04Not applicableUs
ZanaflexCapsule2 mg/1OralLake Erie Medical & Surgical Supply DBA Quality Care Products LLC2012-03-28Not applicableUs
ZanaflexTablet4 mg/1OralAcorda Therapeutics, Inc.1997-01-01Not applicableUs
Approved Generic Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing End
Comfort Pac With TizanidineKitPd Rx Pharmaceuticals, Inc.2013-07-09Not applicableUs
TizanidineTablet4 mg/1OralA S Medication Solutions2002-07-03Not applicableUs
TizanidineTablet4.576 mg/1OralMajor Pharmaceuticals2014-10-01Not applicableUs
TizanidineTablet4 mg/1OralREMEDYREPACK INC.2013-02-19Not applicableUs
TizanidineTablet2 mg/1OralClinical Solutions Wholesale2002-07-03Not applicableUs
TizanidineTablet4 mg/1Oralbryant ranch prepack2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralPreferred Pharmaceuticals, Inc.2014-03-26Not applicableUs
TizanidineTablet2 mg/1OralMedsource Pharmaceuticals2009-01-05Not applicableUs
TizanidineTablet4 mg/1OralDr. Reddy's Laboratories Limited2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralREMEDYREPACK INC.2015-09-03Not applicableUs
TizanidineTablet4 mg/1OralCore Pharma, Llc2007-02-062016-10-13Us
TizanidineTablet2 mg/1OralPreferred Pharmaceuticals, Inc2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralBlenheim Pharmacal, Inc.2014-12-18Not applicableUs
TizanidineTablet2 mg/1OralH.J. Harkins Company, Inc.2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralGolden State Medical Supply, Inc.2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralProficient Rx LP2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralPreferred Pharmaceuticals Inc.2016-03-16Not applicableUs
TizanidineTablet2 mg/1OralAv Kare, Inc.2015-07-23Not applicableUs
TizanidineTablet2 mg/1OralA S Medication Solutions2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralNcs Health Care Of Ky, Inc Dba Vangard Labs2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralUnit Dose Services2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralPd Rx Pharmaceuticals, Inc.2002-11-26Not applicableUs
TizanidineTablet4 mg/1OralA S Medication Solutions2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralBlenheim Pharmacal, Inc.2014-01-22Not applicableUs
TizanidineTablet2 mg/1OralREMEDYREPACK INC.2013-05-15Not applicableUs
TizanidineTablet2 mg/1Oralbryant ranch prepack2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralAidarex Pharmaceuticals LLC2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralPreferred Pharmaceuticals, Inc.2014-03-05Not applicableUs
TizanidineTablet4 mg/1OralREMEDYREPACK INC.2014-11-21Not applicableUs
TizanidineTablet4 mg/1OralLake Erie Medical DBA Quality Care Products LLC2013-04-01Not applicableUs
TizanidineTablet4 mg/1OralCardinal Health2002-07-032016-03-22Us
TizanidineTablet2 mg/1OralREMEDYREPACK INC.2015-12-16Not applicableUs
TizanidineTablet2 mg/1OralSTAT Rx USA LLC2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralPhysicians Total Care, Inc.2004-01-19Not applicableUs
TizanidineTablet2 mg/1OralApotex Corp.2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralDispensing Solutions, Inc.2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralAphena Pharma Solutions Tennessee, Llc2003-05-06Not applicableUs
TizanidineTablet4 mg/1OralPreferred Pharmaceuticals, Inc2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralA S Medication Solutions2003-12-11Not applicableUs
TizanidineTablet2 mg/1OralNcs Health Care Of Ky, Inc Dba Vangard Labs2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralUnit Dose Services2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralSun Pharmaceutical Industries, Inc.2003-12-11Not applicableUs
TizanidineTablet4 mg/1OralProficient Rx LP2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralProficient Rx LP2003-12-11Not applicableUs
TizanidineTablet4 mg/1OralAv Kare, Inc.2015-07-23Not applicableUs
TizanidineTablet2 mg/1OralAltura Pharmaceuticals, Inc.2010-01-01Not applicableUs
TizanidineTablet2 mg/1OralUnichem Pharmaceuticals (USA), Inc.2013-04-01Not applicableUs
TizanidineTablet2 mg/1OralBlenheim Pharmacal, Inc.2014-01-13Not applicableUs
TizanidineTablet2 mg/1OralREMEDYREPACK INC.2013-05-23Not applicableUs
TizanidineTablet4 mg/1OralNew Horizon Rx Group, LLC2013-08-25Not applicableUs
TizanidineTablet2 mg/1OralDIRECT RX2014-01-01Not applicableUs
TizanidineTablet4 mg/1OralMc Kesson Contract Packaging2012-02-23Not applicableUs
TizanidineTablet4 mg/1OralAidarex Pharmaceuticals LLC2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralNcs Health Care Of Ky, Inc Dba Vangard Labs2013-04-01Not applicableUs
TizanidineTablet2 mg/1OralMylan Pharmaceuticals Inc.2003-05-06Not applicableUs
TizanidineTablet4 mg/1OralPd Rx Pharmaceuticals, Inc.2002-07-03Not applicableUs
TizanidineTablet4 mg/1OralCardinal Health2011-01-28Not applicableUs
TizanidineTablet2 mg/1OralA S Medication Solutions2013-04-01Not applicableUs
TizanidineTablet4 mg/1OralSTAT Rx USA LLC2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralPhysicians Total Care, Inc.2004-03-03Not applicableUs
TizanidineTablet4 mg/1OralApotex Corp.2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralAmerican Health Packaging2013-09-25Not applicableUs
TizanidineTablet2 mg/1OralAphena Pharma Solutions Tennessee, Llc2003-05-06Not applicableUs
TizanidineTablet2 mg/1OralA S Medication Solutions2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralMylan Institutional Inc.2003-06-15Not applicableUs
TizanidineTablet4 mg/1OralSun Pharmaceutical Industries, Inc.2003-12-11Not applicableUs
TizanidineTablet4 mg/1OralProficient Rx LP2013-04-01Not applicableUs
TizanidineTablet2 mg/1OralCore Pharma, Llc2007-02-062016-10-13Us
TizanidineTablet4 mg/1OralUnichem Pharmaceuticals (USA), Inc.2013-04-01Not applicableUs
TizanidineTablet2 mg/1OralPreferred Pharmaceuticals Inc.2016-08-01Not applicableUs
TizanidineTablet2 mg/1OralBlenheim Pharmacal, Inc.2014-04-08Not applicableUs
TizanidineTablet4 mg/1OralH.J. Harkins Company, Inc.2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralGolden State Medical Supply, Inc.2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralDIRECT RX2014-01-01Not applicableUs
TizanidineTablet2 mg/1OralAphena Pharma Solutions Tennessee, Llc2004-01-16Not applicableUs
TizanidineTablet4 mg/1OralMylan Pharmaceuticals Inc.2003-05-06Not applicableUs
TizanidineTablet2 mg/1OralCardinal Health2013-03-21Not applicableUs
TizanidineTablet4 mg/1OralA S Medication Solutions2003-12-11Not applicableUs
TizanidineTablet2 mg/1OralDr. Reddy's Laboratories Limited2002-07-03Not applicableUs
TizanidineTablet2 mg/1OralSt. Mary's Medical Park Pharmacy2015-08-18Not applicableUs
TizanidineTablet2 mg/1OralAmerican Health Packaging2014-06-02Not applicableUs
TizanidineTablet4 mg/1OralMedsource Pharmaceuticals2008-12-08Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated4 mg/1OralAv Kare, Inc.2014-06-20Not applicableUs
Tizanidine HydrochlorideCapsule4 mg/1OralMylan Pharmaceuticals Inc.2013-03-01Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralRebel Distributors2007-02-06Not applicableUs
Tizanidine HydrochlorideTablet2 mg/1OralEon Labs, Inc.2002-11-26Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralTIZANIDINE HYDROCHLORIDE2014-01-01Not applicableUs
Tizanidine HydrochlorideTablet2 mg/1OralKeltman Pharmaceuticals Inc.2005-06-01Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralPd Rx Pharmaceuticals, Inc.2002-06-27Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated6 mg/1OralAv Kare, Inc.2014-06-20Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralClinical Solutions Wholesale2002-06-27Not applicableUs
Tizanidine HydrochlorideCapsule6 mg/1OralMylan Pharmaceuticals Inc.2013-03-01Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralKeltman Pharmaceuticals Inc.2005-06-01Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralEon Labs, Inc.2002-06-27Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated2 mg/1OralApotex Corp.2012-02-06Not applicableUs
Tizanidine HydrochlorideTablet2 mg/1OralSTAT Rx USA LLC2002-11-26Not applicableUs
Tizanidine HydrochlorideTablet2 mg/1OralPreferred Pharmaceuticals Inc.2016-06-28Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralLake Erie Medical DBA Quality Care Products LLC2010-11-23Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated4 mg/1OralApotex Corp.2012-02-06Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralMajor Pharmaceuticals2010-07-16Not applicableUs
Tizanidine HydrochlorideCapsule2 mg/1OralMylan Pharmaceuticals Inc.2013-03-01Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated2 mg/1OralAv Kare, Inc.2014-06-20Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralSTAT Rx USA LLC2002-06-27Not applicableUs
Tizanidine HydrochlorideTablet4 mg/1OralAmerican Health Packaging2013-07-082015-12-29Us
Tizanidine HydrochlorideTablet2 mg/1OralLake Erie Medical DBA Quality Care Products LLC2007-02-06Not applicableUs
Tizanidine HydrochlorideTablet2 mg/1OralLake Erie Medical DBA Quality Care Products LLC2011-04-20Not applicableUs
Tizanidine HydrochlorideTablet2 mg/1OralRebel Distributors2007-02-06Not applicableUs
Tizanidine HydrochlorideCapsule, gelatin coated6 mg/1OralApotex Corp.2012-02-06Not applicableUs
Approved Over the Counter ProductsNot Available
Unapproved/Other Products Not Available
International Brands
NameCompany
CimbrarEuroetika
MusantActavis
MyoresMeprofarm
NavizanCaber
RelaxkovBlaskov
SirdalidNovartis
SirdaludNovartis
Sirdalud MRNovartis
SizolanDr. Reddy's
SpaslaxPanion & BF
TelzanineNisshin Seiyaku
TernelinNovartis
TizadinACL
TizaflexActavis
TizaludOpsonin
TizanSun
ZanpeakTatsumi Kagaku
ZitanidNovell
Brand mixturesNot Available
Salts
Name/CASStructureProperties
Tizanidine Hydrochloride
Thumb
  • InChI Key: ZWUKMNZJRDGCTQ-UHFFFAOYSA-N
  • Monoisotopic Mass: 288.995571417
  • Average Mass: 290.172
DBSALT000550
Categories
UNII6AI06C00GW
CAS number51322-75-9
WeightAverage: 253.711
Monoisotopic: 253.018893678
Chemical FormulaC9H8ClN5S
InChI KeyXFYDIVBRZNQMJC-UHFFFAOYSA-N
InChI
InChI=1S/C9H8ClN5S/c10-5-1-2-6-8(15-16-14-6)7(5)13-9-11-3-4-12-9/h1-2H,3-4H2,(H2,11,12,13)
IUPAC Name
5-chloro-N-(4,5-dihydro-1H-imidazol-2-yl)-2,1,3-benzothiadiazol-4-amine
SMILES
ClC1=C(NC2=NCCN2)C2=NSN=C2C=C1
Pharmacology
IndicationFor the management of increased muscle tone associated with spasticity
Structured Indications
PharmacodynamicsTizanidine is a short-acting drug for the management of spasticity. Tizanidine is an agonist at a2-adrenergic receptor sites and presumably reduces spasticity by increasing presynaptic inhibition of motor neurons. In animal models, tizanidine has no direct effect on skeletal muscle fibers or the neuromuscular junction, and no major effect on monosynaptic spinal reflexes. The effects of tizanidine are greatest on polysynaptic pathways. The overall effect of these actions is thought to reduce facilitation of spinal motor neurons.
Mechanism of actionTizanidine reduces spasticity by increasing presynaptic inhibition of motor neurons through agonist action at a2-adrenergic receptor sites.
TargetKindPharmacological actionActionsOrganismUniProt ID
Alpha-2A adrenergic receptorProteinunknown
agonist
HumanP08913 details
Alpha-2B adrenergic receptorProteinyes
agonist
HumanP18089 details
Alpha-2C adrenergic receptorProteinyes
agonist
HumanP18825 details
NischarinProteinno
agonist
HumanQ9Y2I1 details
Related Articles
AbsorptionNot Available
Volume of distribution
  • 2.4 L/kg
Protein binding30%
Metabolism
SubstrateEnzymesProduct
Tizanidine
5-chloro-4-(guanidino)-2,1,3-benzothiadiazoleDetails
Tizanidine
5-chloro-4-(2-imidazolin-4-on-2-ylamino)-2,1,3-benzothiadiazoleDetails
Route of eliminationApproximately 95% of an administered dose is metabolized.
Half life2.5 hours
ClearanceNot Available
ToxicityNot Available
Affected organisms
  • Humans and other mammals
PathwaysNot Available
SNP Mediated EffectsNot Available
SNP Mediated Adverse Drug ReactionsNot Available
Interactions
Drug Interactions
DrugInteractionDrug group
1,1,1,2 TetrafluoroethaneThe risk or severity of adverse effects can be increased when Tizanidine is combined with 1,1,1,2 Tetrafluoroethane.Investigational
7-NitroindazoleThe risk or severity of adverse effects can be increased when 7-Nitroindazole is combined with Tizanidine.Experimental
AbirateroneThe serum concentration of Tizanidine can be increased when it is combined with Abiraterone.Approved
AcebutololTizanidine may increase the atrioventricular blocking (AV block) activities of Acebutolol.Approved
AcepromazineThe risk or severity of adverse effects can be increased when Acepromazine is combined with Tizanidine.Approved, Vet Approved
AceprometazineThe risk or severity of adverse effects can be increased when Aceprometazine is combined with Tizanidine.Approved
AcetazolamideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Acetazolamide.Approved, Vet Approved
AciclovirThe serum concentration of Tizanidine can be increased when it is combined with Aciclovir.Approved
adipiplonThe risk or severity of adverse effects can be increased when adipiplon is combined with Tizanidine.Investigational
AgomelatineThe risk or severity of adverse effects can be increased when Agomelatine is combined with Tizanidine.Approved, Investigational
AldesleukinThe risk or severity of adverse effects can be increased when Aldesleukin is combined with Tizanidine.Approved
AlfaxaloneThe risk or severity of adverse effects can be increased when Alfaxalone is combined with Tizanidine.Vet Approved
AlfentanilThe risk or severity of adverse effects can be increased when Alfentanil is combined with Tizanidine.Approved, Illicit
AlfuzosinAlfuzosin may decrease the vasoconstricting activities of Tizanidine.Approved, Investigational
AliskirenThe risk or severity of adverse effects can be increased when Tizanidine is combined with Aliskiren.Approved, Investigational
AlphacetylmethadolThe risk or severity of adverse effects can be increased when Alphacetylmethadol is combined with Tizanidine.Experimental, Illicit
AlprazolamThe risk or severity of adverse effects can be increased when Alprazolam is combined with Tizanidine.Approved, Illicit, Investigational
AlprenololTizanidine may increase the atrioventricular blocking (AV block) activities of Alprenolol.Approved, Withdrawn
AmifostineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Amifostine.Approved, Investigational
AmilorideThe risk or severity of adverse effects can be increased when Amiloride is combined with Tizanidine.Approved
AmineptineAmineptine may decrease the antihypertensive activities of Tizanidine.Illicit, Withdrawn
AminophyllineThe serum concentration of Tizanidine can be increased when it is combined with Aminophylline.Approved
AmiodaroneThe serum concentration of Tizanidine can be increased when it is combined with Amiodarone.Approved, Investigational
AmisulprideThe risk or severity of adverse effects can be increased when Amisulpride is combined with Tizanidine.Approved, Investigational
AmitriptylineThe serum concentration of Tizanidine can be increased when it is combined with Amitriptyline.Approved
AmlodipineThe serum concentration of Tizanidine can be increased when it is combined with Amlodipine.Approved
AmobarbitalThe risk or severity of adverse effects can be increased when Amobarbital is combined with Tizanidine.Approved, Illicit
AmoxapineThe risk or severity of adverse effects can be increased when Amoxapine is combined with Tizanidine.Approved
AmperozideThe risk or severity of adverse effects can be increased when Amperozide is combined with Tizanidine.Experimental
Amphotericin BThe risk or severity of adverse effects can be increased when Tizanidine is combined with Amphotericin B.Approved, Investigational
Amyl NitriteThe risk or severity of adverse effects can be increased when Tizanidine is combined with Amyl Nitrite.Approved
AnagrelideTizanidine may increase the QTc-prolonging activities of Anagrelide.Approved
AnastrozoleThe serum concentration of Tizanidine can be increased when it is combined with Anastrozole.Approved, Investigational
Aop200704Tizanidine may increase the atrioventricular blocking (AV block) activities of Aop200704.Investigational
ApomorphineThe serum concentration of Tizanidine can be increased when it is combined with Apomorphine.Approved, Investigational
ApraclonidineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Apraclonidine.Approved
AripiprazoleAripiprazole may increase the hypotensive activities of Tizanidine.Approved, Investigational
ArotinololTizanidine may increase the atrioventricular blocking (AV block) activities of Arotinolol.Approved
Arsenic trioxideTizanidine may increase the QTc-prolonging activities of Arsenic trioxide.Approved, Investigational
ArtemetherTizanidine may increase the QTc-prolonging activities of Artemether.Approved
ArticaineThe risk or severity of adverse effects can be increased when Articaine is combined with Tizanidine.Approved
AsenapineTizanidine may increase the QTc-prolonging activities of Asenapine.Approved
AtazanavirThe serum concentration of Tizanidine can be increased when it is combined with Atazanavir.Approved, Investigational
AtenololTizanidine may increase the atrioventricular blocking (AV block) activities of Atenolol.Approved
AzaperoneThe risk or severity of adverse effects can be increased when Azaperone is combined with Tizanidine.Vet Approved
AzelastineTizanidine may increase the central nervous system depressant (CNS depressant) activities of Azelastine.Approved
AzelastineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Azelastine.Approved
Azilsartan medoxomilThe risk or severity of adverse effects can be increased when Tizanidine is combined with Azilsartan medoxomil.Approved
AzithromycinThe serum concentration of Tizanidine can be increased when it is combined with Azithromycin.Approved
BaclofenThe risk or severity of adverse effects can be increased when Baclofen is combined with Tizanidine.Approved
BarbexacloneBarbexaclone may increase the hypotensive activities of Tizanidine.Experimental
BarbitalThe risk or severity of adverse effects can be increased when Barbital is combined with Tizanidine.Illicit
BarnidipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Barnidipine.Approved
BedaquilineTizanidine may increase the QTc-prolonging activities of Bedaquiline.Approved
BefunololTizanidine may increase the atrioventricular blocking (AV block) activities of Befunolol.Experimental
BenazeprilTizanidine may increase the hypotensive activities of Benazepril.Approved, Investigational
BendroflumethiazideThe risk or severity of adverse effects can be increased when Bendroflumethiazide is combined with Tizanidine.Approved
BenperidolThe risk or severity of adverse effects can be increased when Tizanidine is combined with Benperidol.Investigational
BenzocaineThe risk or severity of adverse effects can be increased when Benzocaine is combined with Tizanidine.Approved
Benzyl alcoholThe risk or severity of adverse effects can be increased when Benzyl alcohol is combined with Tizanidine.Approved
Benzylpenicilloyl PolylysineTizanidine may decrease effectiveness of Benzylpenicilloyl Polylysine as a diagnostic agent.Approved
BepridilThe risk or severity of adverse effects can be increased when Tizanidine is combined with Bepridil.Approved, Withdrawn
BeractantTizanidine may increase the bradycardic activities of Beractant.Approved
BetaxololTizanidine may increase the atrioventricular blocking (AV block) activities of Betaxolol.Approved
BevantololTizanidine may increase the atrioventricular blocking (AV block) activities of Bevantolol.Approved
BisoprololTizanidine may increase the atrioventricular blocking (AV block) activities of Bisoprolol.Approved
BopindololTizanidine may increase the atrioventricular blocking (AV block) activities of Bopindolol.Approved
BortezomibThe serum concentration of Tizanidine can be increased when it is combined with Bortezomib.Approved, Investigational
BretyliumBretylium may increase the bradycardic activities of Tizanidine.Approved
BrexpiprazoleThe risk or severity of adverse effects can be increased when Tizanidine is combined with Brexpiprazole.Approved
BrimonidineThe risk or severity of adverse effects can be increased when Brimonidine is combined with Tizanidine.Approved
BrimonidineBrimonidine may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved
BromazepamThe risk or severity of adverse effects can be increased when Bromazepam is combined with Tizanidine.Approved, Illicit
BromocriptineThe serum concentration of Tizanidine can be increased when it is combined with Bromocriptine.Approved, Investigational
BrompheniramineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Brompheniramine.Approved
BrotizolamThe risk or severity of adverse effects can be increased when Brotizolam is combined with Tizanidine.Approved, Withdrawn
BucindololTizanidine may increase the atrioventricular blocking (AV block) activities of Bucindolol.Investigational
BufuralolTizanidine may increase the atrioventricular blocking (AV block) activities of Bufuralol.Experimental, Investigational
BumetanideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Bumetanide.Approved
BupivacaineThe risk or severity of adverse effects can be increased when Bupivacaine is combined with Tizanidine.Approved, Investigational
BupranololTizanidine may increase the atrioventricular blocking (AV block) activities of Bupranolol.Approved
BuprenorphineThe serum concentration of Tizanidine can be increased when it is combined with Buprenorphine.Approved, Illicit, Investigational, Vet Approved
BuspironeThe risk or severity of adverse effects can be increased when Buspirone is combined with Tizanidine.Approved, Investigational
ButabarbitalThe risk or severity of adverse effects can be increased when Butabarbital is combined with Tizanidine.Approved, Illicit
ButacaineThe risk or severity of adverse effects can be increased when Butacaine is combined with Tizanidine.Vet Approved
ButalbitalThe risk or severity of adverse effects can be increased when Butalbital is combined with Tizanidine.Approved, Illicit
ButambenThe risk or severity of adverse effects can be increased when Butamben is combined with Tizanidine.Approved
ButethalThe risk or severity of adverse effects can be increased when Butethal is combined with Tizanidine.Approved, Illicit
ButorphanolThe risk or severity of adverse effects can be increased when Butorphanol is combined with Tizanidine.Approved, Illicit, Vet Approved
CabergolineCabergoline may increase the hypertensive activities of Tizanidine.Approved
CaffeineThe serum concentration of Tizanidine can be increased when it is combined with Caffeine.Approved
CalfactantTizanidine may increase the bradycardic activities of Calfactant.Approved
CanagliflozinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Canagliflozin.Approved
CandesartanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Candesartan.Approved
CandoxatrilTizanidine may increase the hypotensive activities of Candoxatril.Experimental
CaptoprilTizanidine may increase the hypotensive activities of Captopril.Approved
CarbamazepineThe metabolism of Tizanidine can be increased when combined with Carbamazepine.Approved, Investigational
CarbetocinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Carbetocin.Approved
CarbimazoleThe serum concentration of Tizanidine can be increased when it is combined with Carbimazole.Approved
CarbinoxamineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Carbinoxamine.Approved
CarfentanilThe risk or severity of adverse effects can be increased when Carfentanil is combined with Tizanidine.Illicit, Vet Approved
CarisoprodolThe risk or severity of adverse effects can be increased when Carisoprodol is combined with Tizanidine.Approved
CarteololTizanidine may increase the atrioventricular blocking (AV block) activities of Carteolol.Approved
CarvedilolTizanidine may increase the atrioventricular blocking (AV block) activities of Carvedilol.Approved, Investigational
CeliprololTizanidine may increase the atrioventricular blocking (AV block) activities of Celiprolol.Approved, Investigational
CeritinibTizanidine may increase the bradycardic activities of Ceritinib.Approved
CetirizineThe risk or severity of adverse effects can be increased when Cetirizine is combined with Tizanidine.Approved
Chloral hydrateThe risk or severity of adverse effects can be increased when Chloral hydrate is combined with Tizanidine.Approved, Illicit, Vet Approved
ChlordiazepoxideThe risk or severity of adverse effects can be increased when Chlordiazepoxide is combined with Tizanidine.Approved, Illicit
ChlormezanoneThe risk or severity of adverse effects can be increased when Chlormezanone is combined with Tizanidine.Approved, Withdrawn
ChloroprocaineThe risk or severity of adverse effects can be increased when Chloroprocaine is combined with Tizanidine.Approved
ChloroquineTizanidine may increase the QTc-prolonging activities of Chloroquine.Approved, Vet Approved
ChlorothiazideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Chlorothiazide.Approved, Vet Approved
ChlorphenamineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Chlorphenamine.Approved
ChlorpromazineTizanidine may increase the QTc-prolonging activities of Chlorpromazine.Approved, Vet Approved
ChlorprothixeneThe risk or severity of adverse effects can be increased when Chlorprothixene is combined with Tizanidine.Approved, Withdrawn
ChlorthalidoneThe risk or severity of adverse effects can be increased when Chlorthalidone is combined with Tizanidine.Approved
ChlorzoxazoneThe risk or severity of adverse effects can be increased when Chlorzoxazone is combined with Tizanidine.Approved
CilazaprilTizanidine may increase the hypotensive activities of Cilazapril.Approved
CilnidipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Cilnidipine.Approved
CimetidineThe serum concentration of Tizanidine can be increased when it is combined with Cimetidine.Approved
CinchocaineThe risk or severity of adverse effects can be increased when Cinchocaine is combined with Tizanidine.Approved, Vet Approved
CiprofloxacinTizanidine may increase the QTc-prolonging activities of Ciprofloxacin.Approved, Investigational
CisaprideTizanidine may increase the QTc-prolonging activities of Cisapride.Approved, Investigational, Withdrawn
CitalopramThe serum concentration of Tizanidine can be increased when it is combined with Citalopram.Approved
ClarithromycinThe serum concentration of Tizanidine can be increased when it is combined with Clarithromycin.Approved
ClemastineThe risk or severity of adverse effects can be increased when Clemastine is combined with Tizanidine.Approved
ClevidipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Clevidipine.Approved
ClidiniumThe risk or severity of adverse effects can be increased when Tizanidine is combined with Clidinium.Approved
ClobazamThe risk or severity of adverse effects can be increased when Clobazam is combined with Tizanidine.Approved, Illicit
ClofarabineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Clofarabine.Approved, Investigational
clomethiazoleThe risk or severity of adverse effects can be increased when clomethiazole is combined with Tizanidine.Investigational
ClomipramineClomipramine may decrease the antihypertensive activities of Tizanidine.Approved, Vet Approved
ClonazepamThe risk or severity of adverse effects can be increased when Tizanidine is combined with Clonazepam.Approved, Illicit
ClonidineThe risk or severity of adverse effects can be increased when Clonidine is combined with Tizanidine.Approved
ClorazepateThe risk or severity of adverse effects can be increased when Clorazepate is combined with Tizanidine.Approved, Illicit
ClotrimazoleThe serum concentration of Tizanidine can be increased when it is combined with Clotrimazole.Approved, Vet Approved
ClozapineThe serum concentration of Tizanidine can be increased when it is combined with Clozapine.Approved
CocaineThe risk or severity of adverse effects can be increased when Cocaine is combined with Tizanidine.Approved, Illicit
CodeineThe risk or severity of adverse effects can be increased when Codeine is combined with Tizanidine.Approved, Illicit
ConivaptanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Conivaptan.Approved, Investigational
Conjugated Equine EstrogensThe serum concentration of Tizanidine can be increased when it is combined with Conjugated Equine Estrogens.Approved
CrizotinibTizanidine may increase the QTc-prolonging activities of Crizotinib.Approved
CyclizineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Cyclizine.Approved
CyclobenzaprineCyclobenzaprine may decrease the antihypertensive activities of Tizanidine.Approved
CyproheptadineThe risk or severity of adverse effects can be increased when Cyproheptadine is combined with Tizanidine.Approved
Cyproterone acetateThe serum concentration of Tizanidine can be decreased when it is combined with Cyproterone acetate.Approved, Investigational
DantroleneThe risk or severity of adverse effects can be increased when Tizanidine is combined with Dantrolene.Approved
DapagliflozinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Dapagliflozin.Approved
DapiprazoleThe risk or severity of adverse effects can be increased when Dapiprazole is combined with Tizanidine.Approved
DapoxetineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Dapoxetine.Investigational
DeferasiroxThe serum concentration of Tizanidine can be increased when it is combined with Deferasirox.Approved, Investigational
DelavirdineThe serum concentration of Tizanidine can be increased when it is combined with Delavirdine.Approved
deramciclaneThe risk or severity of adverse effects can be increased when deramciclane is combined with Tizanidine.Investigational
DesfluraneThe risk or severity of adverse effects can be increased when Desflurane is combined with Tizanidine.Approved
DesipramineDesipramine may decrease the antihypertensive activities of Tizanidine.Approved
DesloratadineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Desloratadine.Approved, Investigational
DesvenlafaxineDesvenlafaxine may increase the tachycardic activities of Tizanidine.Approved
DetomidineThe risk or severity of adverse effects can be increased when Detomidine is combined with Tizanidine.Vet Approved
DexbrompheniramineThe risk or severity of adverse effects can be increased when Dexbrompheniramine is combined with Tizanidine.Approved
DexmedetomidineThe serum concentration of Tizanidine can be increased when it is combined with Dexmedetomidine.Approved, Vet Approved
DextromoramideThe risk or severity of adverse effects can be increased when Dextromoramide is combined with Tizanidine.Experimental, Illicit
DextropropoxypheneThe risk or severity of adverse effects can be increased when Dextropropoxyphene is combined with Tizanidine.Approved, Illicit, Withdrawn
DezocineThe risk or severity of adverse effects can be increased when Dezocine is combined with Tizanidine.Approved
DiazepamThe risk or severity of adverse effects can be increased when Diazepam is combined with Tizanidine.Approved, Illicit, Vet Approved
DiclofenacThe serum concentration of Tizanidine can be increased when it is combined with Diclofenac.Approved, Vet Approved
DiclofenamideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Diclofenamide.Approved
DifenoxinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Difenoxin.Approved, Illicit
DigoxinDigoxin may increase the bradycardic activities of Tizanidine.Approved
DihydrocodeineThe risk or severity of adverse effects can be increased when Dihydrocodeine is combined with Tizanidine.Approved, Illicit
DihydroergotamineDihydroergotamine may increase the hypertensive activities of Tizanidine.Approved
DihydroetorphineThe risk or severity of adverse effects can be increased when Dihydroetorphine is combined with Tizanidine.Experimental, Illicit
DihydromorphineThe risk or severity of adverse effects can be increased when Dihydromorphine is combined with Tizanidine.Experimental, Illicit
DiltiazemThe risk or severity of adverse effects can be increased when Diltiazem is combined with Tizanidine.Approved
DimenhydrinateThe risk or severity of adverse effects can be increased when Tizanidine is combined with Dimenhydrinate.Approved
DinutuximabThe risk or severity of adverse effects can be increased when Tizanidine is combined with Dinutuximab.Approved
DiphenhydramineThe risk or severity of adverse effects can be increased when Diphenhydramine is combined with Tizanidine.Approved
DiphenoxylateThe risk or severity of adverse effects can be increased when Diphenoxylate is combined with Tizanidine.Approved, Illicit
DipyridamoleThe risk or severity of adverse effects can be increased when Tizanidine is combined with Dipyridamole.Approved
DisopyramideTizanidine may increase the QTc-prolonging activities of Disopyramide.Approved
DisulfiramThe serum concentration of Tizanidine can be increased when it is combined with Disulfiram.Approved
DofetilideTizanidine may increase the QTc-prolonging activities of Dofetilide.Approved
DolasetronTizanidine may increase the QTc-prolonging activities of Dolasetron.Approved
DomperidoneTizanidine may increase the QTc-prolonging activities of Domperidone.Approved, Investigational, Vet Approved
DonepezilTizanidine may increase the bradycardic activities of Donepezil.Approved
DoramectinThe risk or severity of adverse effects can be increased when Doramectin is combined with Tizanidine.Vet Approved
DosulepinDosulepin may decrease the antihypertensive activities of Tizanidine.Approved
DoxazosinThe risk or severity of adverse effects can be increased when Doxazosin is combined with Tizanidine.Approved
DoxepinDoxepin may decrease the antihypertensive activities of Tizanidine.Approved
DoxylamineDoxylamine may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved, Vet Approved
DPDPEThe risk or severity of adverse effects can be increased when DPDPE is combined with Tizanidine.Investigational
DronabinolDronabinol may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved, Illicit
DronedaroneTizanidine may increase the QTc-prolonging activities of Dronedarone.Approved
DroperidolDroperidol may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved, Vet Approved
DrotebanolThe risk or severity of adverse effects can be increased when Drotebanol is combined with Tizanidine.Experimental, Illicit
DuloxetineTizanidine may increase the orthostatic hypotensive activities of Duloxetine.Approved
DyclonineThe risk or severity of adverse effects can be increased when Dyclonine is combined with Tizanidine.Approved
EcgonineThe risk or severity of adverse effects can be increased when Ecgonine is combined with Tizanidine.Experimental, Illicit
ECGONINE METHYL ESTERThe risk or severity of adverse effects can be increased when ECGONINE METHYL ESTER is combined with Tizanidine.Experimental
EcopipamThe risk or severity of adverse effects can be increased when Tizanidine is combined with Ecopipam.Investigational
EfavirenzThe risk or severity of adverse effects can be increased when Efavirenz is combined with Tizanidine.Approved, Investigational
EfonidipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Efonidipine.Approved
EliglustatTizanidine may increase the QTc-prolonging activities of Eliglustat.Approved
EmpagliflozinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Empagliflozin.Approved
EnalaprilTizanidine may increase the hypotensive activities of Enalapril.Approved, Vet Approved
EnalaprilatTizanidine may increase the hypotensive activities of Enalaprilat.Approved
EnfluraneThe risk or severity of adverse effects can be increased when Enflurane is combined with Tizanidine.Approved, Vet Approved
EntacaponeThe serum concentration of Tizanidine can be increased when it is combined with Entacapone.Approved, Investigational
EplerenoneThe risk or severity of adverse effects can be increased when Tizanidine is combined with Eplerenone.Approved
EpoprostenolThe risk or severity of adverse effects can be increased when Tizanidine is combined with Epoprostenol.Approved
EprosartanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Eprosartan.Approved
Ergoloid mesylateErgoloid mesylate may increase the hypertensive activities of Tizanidine.Approved
ErgonovineErgonovine may increase the hypertensive activities of Tizanidine.Approved
ErgotamineErgotamine may increase the hypertensive activities of Tizanidine.Approved
ErythromycinTizanidine may increase the QTc-prolonging activities of Erythromycin.Approved, Vet Approved
EscitalopramTizanidine may increase the QTc-prolonging activities of Escitalopram.Approved, Investigational
EsmirtazapineEsmirtazapine may decrease the antihypertensive activities of Tizanidine.Investigational
EsmololTizanidine may increase the atrioventricular blocking (AV block) activities of Esmolol.Approved
EstazolamThe risk or severity of adverse effects can be increased when Estazolam is combined with Tizanidine.Approved, Illicit
EstradiolThe serum concentration of Tizanidine can be increased when it is combined with Estradiol.Approved, Investigational, Vet Approved
EszopicloneThe risk or severity of adverse effects can be increased when Eszopiclone is combined with Tizanidine.Approved
Etacrynic acidThe risk or severity of adverse effects can be increased when Tizanidine is combined with Etacrynic acid.Approved
EthanolTizanidine may increase the central nervous system depressant (CNS depressant) activities of Ethanol.Approved
EthchlorvynolThe risk or severity of adverse effects can be increased when Ethchlorvynol is combined with Tizanidine.Approved, Illicit, Withdrawn
EthosuximideThe risk or severity of adverse effects can be increased when Ethosuximide is combined with Tizanidine.Approved
EthotoinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Ethotoin.Approved
Ethyl carbamateThe risk or severity of adverse effects can be increased when Ethyl carbamate is combined with Tizanidine.Withdrawn
Ethyl loflazepateThe risk or severity of adverse effects can be increased when Ethyl loflazepate is combined with Tizanidine.Approved, Illicit
EthylmorphineThe risk or severity of adverse effects can be increased when Ethylmorphine is combined with Tizanidine.Approved, Illicit
EtidocaineThe risk or severity of adverse effects can be increased when Etidocaine is combined with Tizanidine.Approved
EtifoxineThe risk or severity of adverse effects can be increased when Etifoxine is combined with Tizanidine.Withdrawn
EtizolamThe risk or severity of adverse effects can be increased when Etizolam is combined with Tizanidine.Approved
EtomidateThe risk or severity of adverse effects can be increased when Etomidate is combined with Tizanidine.Approved
EtoperidoneThe risk or severity of adverse effects can be increased when Tizanidine is combined with Etoperidone.Approved
EtorphineThe risk or severity of adverse effects can be increased when Etorphine is combined with Tizanidine.Illicit, Vet Approved
EzogabineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Ezogabine.Approved
FelbamateThe risk or severity of adverse effects can be increased when Tizanidine is combined with Felbamate.Approved
FelodipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Felodipine.Approved, Investigational
FencamfamineThe risk or severity of adverse effects can be increased when Fencamfamine is combined with Tizanidine.Approved, Illicit, Withdrawn
FenoldopamThe risk or severity of adverse effects can be increased when Tizanidine is combined with Fenoldopam.Approved
FentanylThe risk or severity of adverse effects can be increased when Fentanyl is combined with Tizanidine.Approved, Illicit, Investigational, Vet Approved
FexofenadineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Fexofenadine.Approved
FimasartanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Fimasartan.Approved
FingolimodTizanidine may increase the bradycardic activities of Fingolimod.Approved, Investigational
FlecainideTizanidine may increase the QTc-prolonging activities of Flecainide.Approved, Withdrawn
FlibanserinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Flibanserin.Approved
FluconazoleThe serum concentration of Tizanidine can be increased when it is combined with Fluconazole.Approved
FludiazepamThe risk or severity of adverse effects can be increased when Fludiazepam is combined with Tizanidine.Approved, Illicit
FlunarizineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Flunarizine.Approved
FlunitrazepamThe risk or severity of adverse effects can be increased when Flunitrazepam is combined with Tizanidine.Approved, Illicit
FluoxetineThe serum concentration of Tizanidine can be increased when it is combined with Fluoxetine.Approved, Vet Approved
FlupentixolTizanidine may increase the QTc-prolonging activities of Flupentixol.Approved, Withdrawn
FluphenazineThe serum concentration of Tizanidine can be increased when it is combined with Fluphenazine.Approved
FlurazepamThe risk or severity of adverse effects can be increased when Flurazepam is combined with Tizanidine.Approved, Illicit
FluspirileneThe risk or severity of adverse effects can be increased when Fluspirilene is combined with Tizanidine.Approved
FlutamideThe serum concentration of Tizanidine can be increased when it is combined with Flutamide.Approved
Fluticasone PropionateThe risk or severity of adverse effects can be increased when Fluticasone Propionate is combined with Tizanidine.Approved
FluvastatinThe serum concentration of Tizanidine can be increased when it is combined with Fluvastatin.Approved
FluvoxamineThe serum concentration of Tizanidine can be increased when it is combined with Fluvoxamine.Approved, Investigational
FosinoprilTizanidine may increase the hypotensive activities of Fosinopril.Approved
FosphenytoinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Fosphenytoin.Approved
FospropofolThe risk or severity of adverse effects can be increased when Fospropofol is combined with Tizanidine.Approved, Illicit
FurosemideThe risk or severity of adverse effects can be increased when Furosemide is combined with Tizanidine.Approved, Vet Approved
GabapentinThe risk or severity of adverse effects can be increased when Gabapentin is combined with Tizanidine.Approved, Investigational
gabapentin enacarbilThe risk or severity of adverse effects can be increased when Tizanidine is combined with gabapentin enacarbil.Approved
Gadobenic acidTizanidine may increase the QTc-prolonging activities of Gadobenic acid.Approved
GalantamineGalantamine may increase the bradycardic activities of Tizanidine.Approved
Gamma Hydroxybutyric AcidThe risk or severity of adverse effects can be increased when Gamma Hydroxybutyric Acid is combined with Tizanidine.Approved, Illicit
GemifloxacinTizanidine may increase the QTc-prolonging activities of Gemifloxacin.Approved, Investigational
GepironeThe risk or severity of adverse effects can be increased when Tizanidine is combined with Gepirone.Investigational
GlutethimideThe risk or severity of adverse effects can be increased when Glutethimide is combined with Tizanidine.Approved, Illicit
Glycerol PhenylbutyrateThe serum concentration of Tizanidine can be increased when it is combined with Glycerol Phenylbutyrate.Approved
GoserelinTizanidine may increase the QTc-prolonging activities of Goserelin.Approved
GranisetronTizanidine may increase the QTc-prolonging activities of Granisetron.Approved, Investigational
GuanfacineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Guanfacine.Approved, Investigational
HalazepamThe risk or severity of adverse effects can be increased when Halazepam is combined with Tizanidine.Approved, Illicit, Withdrawn
HaloperidolTizanidine may increase the QTc-prolonging activities of Haloperidol.Approved
HalothaneThe risk or severity of adverse effects can be increased when Halothane is combined with Tizanidine.Approved, Vet Approved
HeroinThe risk or severity of adverse effects can be increased when Heroin is combined with Tizanidine.Approved, Illicit
HexobarbitalThe risk or severity of adverse effects can be increased when Hexobarbital is combined with Tizanidine.Approved
HyaluronidaseHyaluronidase may increase the vasoconstricting activities of Tizanidine.Approved, Investigational
HydralazineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Hydralazine.Approved
HydrochlorothiazideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Hydrochlorothiazide.Approved, Vet Approved
HydrocodoneTizanidine may increase the central nervous system depressant (CNS depressant) activities of Hydrocodone.Approved, Illicit
HydroflumethiazideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Hydroflumethiazide.Approved
HydromorphoneThe risk or severity of adverse effects can be increased when Hydromorphone is combined with Tizanidine.Approved, Illicit
HydroxyzineHydroxyzine may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved
IbutilideTizanidine may increase the QTc-prolonging activities of Ibutilide.Approved
IloperidoneTizanidine may increase the QTc-prolonging activities of Iloperidone.Approved
IloprostThe risk or severity of adverse effects can be increased when Tizanidine is combined with Iloprost.Approved, Investigational
ImidaprilTizanidine may increase the hypotensive activities of Imidapril.Investigational
ImipramineThe serum concentration of Tizanidine can be increased when it is combined with Imipramine.Approved
IndalpineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Indalpine.Investigational, Withdrawn
IndapamideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Indapamide.Approved
IndenololTizanidine may increase the atrioventricular blocking (AV block) activities of Indenolol.Withdrawn
IndoraminThe risk or severity of adverse effects can be increased when Tizanidine is combined with Indoramin.Withdrawn
Interferon Alfa-2b, RecombinantThe serum concentration of Tizanidine can be increased when it is combined with Interferon Alfa-2b, Recombinant.Approved
Interferon gamma-1bThe serum concentration of Tizanidine can be increased when it is combined with Interferon gamma-1b.Approved, Investigational
IobenguaneThe therapeutic efficacy of Iobenguane can be decreased when used in combination with Tizanidine.Approved
IrbesartanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Irbesartan.Approved, Investigational
IsocarboxazidThe risk or severity of adverse effects can be increased when Tizanidine is combined with Isocarboxazid.Approved
IsofluraneThe risk or severity of adverse effects can be increased when Isoflurane is combined with Tizanidine.Approved, Vet Approved
IsoniazidThe serum concentration of Tizanidine can be increased when it is combined with Isoniazid.Approved
Isosorbide DinitrateThe risk or severity of adverse effects can be increased when Tizanidine is combined with Isosorbide Dinitrate.Approved
Isosorbide MononitrateThe risk or severity of adverse effects can be increased when Tizanidine is combined with Isosorbide Mononitrate.Approved
IsoxsuprineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Isoxsuprine.Approved, Withdrawn
IsradipineThe risk or severity of adverse effects can be increased when Isradipine is combined with Tizanidine.Approved
IvabradineTizanidine may increase the bradycardic activities of Ivabradine.Approved
KetamineThe risk or severity of adverse effects can be increased when Ketamine is combined with Tizanidine.Approved, Vet Approved
KetazolamThe risk or severity of adverse effects can be increased when Ketazolam is combined with Tizanidine.Approved
KetobemidoneThe risk or severity of adverse effects can be increased when Ketobemidone is combined with Tizanidine.Approved
KetoconazoleThe serum concentration of Tizanidine can be increased when it is combined with Ketoconazole.Approved, Investigational
LabetalolTizanidine may increase the atrioventricular blocking (AV block) activities of Labetalol.Approved
LacidipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Lacidipine.Approved
LacosamideTizanidine may increase the atrioventricular blocking (AV block) activities of Lacosamide.Approved
LamotrigineThe risk or severity of adverse effects can be increased when Lamotrigine is combined with Tizanidine.Approved, Investigational
LanreotideTizanidine may increase the bradycardic activities of Lanreotide.Approved
LenvatinibTizanidine may increase the QTc-prolonging activities of Lenvatinib.Approved
LercanidipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Lercanidipine.Approved, Investigational
LeuprolideTizanidine may increase the QTc-prolonging activities of Leuprolide.Approved, Investigational
LevetiracetamThe risk or severity of adverse effects can be increased when Tizanidine is combined with Levetiracetam.Approved, Investigational
LevobunololThe risk or severity of adverse effects can be increased when Tizanidine is combined with Levobunolol.Approved
LevobupivacaineThe risk or severity of adverse effects can be increased when Levobupivacaine is combined with Tizanidine.Approved
LevocabastineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Levocabastine.Approved
LevocetirizineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Levocetirizine.Approved
LevodopaTizanidine may increase the orthostatic hypotensive activities of Levodopa.Approved
LevofloxacinTizanidine may increase the QTc-prolonging activities of Levofloxacin.Approved, Investigational
Levomethadyl AcetateThe risk or severity of adverse effects can be increased when Levomethadyl Acetate is combined with Tizanidine.Approved
LevomilnacipranLevomilnacipran may increase the tachycardic activities of Tizanidine.Approved
LevorphanolThe risk or severity of adverse effects can be increased when Levorphanol is combined with Tizanidine.Approved
LevosimendanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Levosimendan.Approved, Investigational
LidocaineThe serum concentration of Tizanidine can be increased when it is combined with Lidocaine.Approved, Vet Approved
LisinoprilTizanidine may increase the hypotensive activities of Lisinopril.Approved, Investigational
LithiumThe risk or severity of adverse effects can be increased when Lithium is combined with Tizanidine.Approved
LofentanilThe risk or severity of adverse effects can be increased when Lofentanil is combined with Tizanidine.Illicit
LofexidineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Lofexidine.Approved, Investigational
LomefloxacinThe serum concentration of Tizanidine can be increased when it is combined with Lomefloxacin.Approved
LopinavirTizanidine may increase the QTc-prolonging activities of Lopinavir.Approved
LoratadineThe risk or severity of adverse effects can be increased when Loratadine is combined with Tizanidine.Approved
LorazepamThe risk or severity of adverse effects can be increased when Lorazepam is combined with Tizanidine.Approved
LosartanThe serum concentration of Tizanidine can be increased when it is combined with Losartan.Approved
LoxapineThe risk or severity of adverse effects can be increased when Loxapine is combined with Tizanidine.Approved
Lu AA21004The risk or severity of adverse effects can be increased when Lu AA21004 is combined with Tizanidine.Investigational
LucinactantTizanidine may increase the bradycardic activities of Lucinactant.Approved
LumefantrineTizanidine may increase the QTc-prolonging activities of Lumefantrine.Approved
LurasidoneThe risk or severity of adverse effects can be increased when Lurasidone is combined with Tizanidine.Approved
Magnesium SulfateMagnesium Sulfate may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved, Vet Approved
MannitolThe risk or severity of adverse effects can be increased when Tizanidine is combined with Mannitol.Approved, Investigational
MaprotilineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Maprotiline.Approved
MecamylamineThe risk or severity of adverse effects can be increased when Mecamylamine is combined with Tizanidine.Approved
MeclizineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Meclizine.Approved
MedetomidineThe risk or severity of adverse effects can be increased when Medetomidine is combined with Tizanidine.Vet Approved
MefloquineThe therapeutic efficacy of Tizanidine can be decreased when used in combination with Mefloquine.Approved
MelatoninThe risk or severity of adverse effects can be increased when Melatonin is combined with Tizanidine.Approved, Nutraceutical, Vet Approved
MelperoneThe risk or severity of adverse effects can be increased when Melperone is combined with Tizanidine.Approved
MepivacaineThe risk or severity of adverse effects can be increased when Mepivacaine is combined with Tizanidine.Approved, Vet Approved
MeprobamateThe risk or severity of adverse effects can be increased when Meprobamate is combined with Tizanidine.Approved, Illicit
MesoridazineThe risk or severity of adverse effects can be increased when Mesoridazine is combined with Tizanidine.Approved
MestranolThe serum concentration of Tizanidine can be increased when it is combined with Mestranol.Approved
MetaxaloneThe risk or severity of adverse effects can be increased when Metaxalone is combined with Tizanidine.Approved
MethadoneTizanidine may increase the QTc-prolonging activities of Methadone.Approved
Methadyl AcetateThe risk or severity of adverse effects can be increased when Methadyl Acetate is combined with Tizanidine.Approved, Illicit
MethapyrileneThe risk or severity of adverse effects can be increased when Methapyrilene is combined with Tizanidine.Withdrawn
MethaqualoneThe risk or severity of adverse effects can be increased when Methaqualone is combined with Tizanidine.Illicit, Withdrawn
MethazolamideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Methazolamide.Approved
MethimazoleThe serum concentration of Tizanidine can be increased when it is combined with Methimazole.Approved
MethocarbamolThe risk or severity of adverse effects can be increased when Methocarbamol is combined with Tizanidine.Approved, Vet Approved
MethohexitalThe risk or severity of adverse effects can be increased when Methohexital is combined with Tizanidine.Approved
MethotrimeprazineTizanidine may increase the central nervous system depressant (CNS depressant) activities of Methotrimeprazine.Approved
MethoxyfluraneThe risk or severity of adverse effects can be increased when Methoxyflurane is combined with Tizanidine.Approved, Vet Approved
MethsuximideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Methsuximide.Approved
MethyclothiazideThe risk or severity of adverse effects can be increased when Methyclothiazide is combined with Tizanidine.Approved
MethyldopaThe risk or severity of adverse effects can be increased when Tizanidine is combined with Methyldopa.Approved
MethylphenobarbitalThe risk or severity of adverse effects can be increased when Methylphenobarbital is combined with Tizanidine.Approved
MetipranololThe risk or severity of adverse effects can be increased when Tizanidine is combined with Metipranolol.Approved
MetolazoneThe risk or severity of adverse effects can be increased when Metolazone is combined with Tizanidine.Approved
MetoprololTizanidine may increase the atrioventricular blocking (AV block) activities of Metoprolol.Approved, Investigational
MetyrosineTizanidine may increase the sedative activities of Metyrosine.Approved
MexiletineThe serum concentration of Tizanidine can be increased when it is combined with Mexiletine.Approved
MianserinThe therapeutic efficacy of Tizanidine can be decreased when used in combination with Mianserin.Approved
MidazolamThe risk or severity of adverse effects can be increased when Midazolam is combined with Tizanidine.Approved, Illicit
MifepristoneMifepristone may increase the QTc-prolonging activities of Tizanidine.Approved, Investigational
MilnacipranMilnacipran may increase the tachycardic activities of Tizanidine.Approved
MinocyclineMinocycline may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved, Investigational
MinoxidilThe risk or severity of adverse effects can be increased when Minoxidil is combined with Tizanidine.Approved
MirtazapineMirtazapine may decrease the antihypertensive activities of Tizanidine.Approved
MoclobemideThe serum concentration of Tizanidine can be increased when it is combined with Moclobemide.Approved
MoexiprilTizanidine may increase the hypotensive activities of Moexipril.Approved
MolindoneThe risk or severity of adverse effects can be increased when Molindone is combined with Tizanidine.Approved
MorphineThe risk or severity of adverse effects can be increased when Morphine is combined with Tizanidine.Approved, Investigational
MoxifloxacinTizanidine may increase the QTc-prolonging activities of Moxifloxacin.Approved, Investigational
MoxonidineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Moxonidine.Approved
NabiloneNabilone may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved, Investigational
NadololTizanidine may increase the atrioventricular blocking (AV block) activities of Nadolol.Approved
NalbuphineThe risk or severity of adverse effects can be increased when Nalbuphine is combined with Tizanidine.Approved
NebivololThe risk or severity of adverse effects can be increased when Tizanidine is combined with Nebivolol.Approved, Investigational
NefazodoneThe serum concentration of Tizanidine can be increased when it is combined with Nefazodone.Approved, Withdrawn
NelfinavirThe serum concentration of Tizanidine can be increased when it is combined with Nelfinavir.Approved
NesiritideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Nesiritide.Approved, Investigational
NevirapineThe serum concentration of Tizanidine can be increased when it is combined with Nevirapine.Approved
NicardipineThe risk or severity of adverse effects can be increased when Nicardipine is combined with Tizanidine.Approved
NicorandilNicorandil may increase the hypotensive activities of Tizanidine.Approved
NifedipineThe serum concentration of Tizanidine can be increased when it is combined with Nifedipine.Approved
NilotinibTizanidine may increase the QTc-prolonging activities of Nilotinib.Approved, Investigational
NilvadipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Nilvadipine.Approved
NimodipineThe risk or severity of adverse effects can be increased when Nimodipine is combined with Tizanidine.Approved
NisoldipineThe serum concentration of Tizanidine can be increased when it is combined with Nisoldipine.Approved
NitrazepamThe risk or severity of adverse effects can be increased when Nitrazepam is combined with Tizanidine.Approved
NitrendipineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Nitrendipine.Approved
Nitric OxideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Nitric Oxide.Approved
NitroglycerinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Nitroglycerin.Approved, Investigational
NitroprussideThe risk or severity of adverse effects can be increased when Nitroprusside is combined with Tizanidine.Approved
Nitrous oxideThe risk or severity of adverse effects can be increased when Nitrous oxide is combined with Tizanidine.Approved, Vet Approved
NorfloxacinThe serum concentration of Tizanidine can be increased when it is combined with Norfloxacin.Approved
NormethadoneThe risk or severity of adverse effects can be increased when Normethadone is combined with Tizanidine.Approved, Illicit
NortriptylineNortriptyline may decrease the antihypertensive activities of Tizanidine.Approved
Obeticholic acidThe serum concentration of Tizanidine can be increased when it is combined with Obeticholic acid.Approved
ObinutuzumabThe risk or severity of adverse effects can be increased when Tizanidine is combined with Obinutuzumab.Approved
OctreotideOctreotide may increase the bradycardic activities of Tizanidine.Approved, Investigational
OfloxacinTizanidine may increase the QTc-prolonging activities of Ofloxacin.Approved
OlanzapineThe serum concentration of Tizanidine can be increased when it is combined with Olanzapine.Approved, Investigational
OlmesartanThe risk or severity of adverse effects can be increased when Olmesartan is combined with Tizanidine.Approved, Investigational
OlopatadineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Olopatadine.Approved
OmapatrilatTizanidine may increase the hypotensive activities of Omapatrilat.Investigational
OmeprazoleThe serum concentration of Tizanidine can be increased when it is combined with Omeprazole.Approved, Investigational, Vet Approved
OndansetronThe serum concentration of Tizanidine can be increased when it is combined with Ondansetron.Approved
OpipramolOpipramol may decrease the antihypertensive activities of Tizanidine.Investigational
OpiumThe risk or severity of adverse effects can be increased when Opium is combined with Tizanidine.Approved, Illicit
OrlistatThe serum concentration of Tizanidine can be decreased when it is combined with Orlistat.Approved, Investigational
OrphenadrineTizanidine may increase the central nervous system depressant (CNS depressant) activities of Orphenadrine.Approved
OsanetantThe risk or severity of adverse effects can be increased when Osanetant is combined with Tizanidine.Investigational
OsimertinibThe serum concentration of Tizanidine can be decreased when it is combined with Osimertinib.Approved
OxazepamThe risk or severity of adverse effects can be increased when Oxazepam is combined with Tizanidine.Approved
OxetacaineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Oxetacaine.Investigational
OxprenololTizanidine may increase the atrioventricular blocking (AV block) activities of Oxprenolol.Approved
OxybuprocaineThe risk or severity of adverse effects can be increased when Oxybuprocaine is combined with Tizanidine.Approved
OxycodoneThe risk or severity of adverse effects can be increased when Oxycodone is combined with Tizanidine.Approved, Illicit, Investigational
OxymorphoneThe risk or severity of adverse effects can be increased when Oxymorphone is combined with Tizanidine.Approved, Investigational, Vet Approved
PaclitaxelThe risk or severity of adverse effects can be increased when Tizanidine is combined with Paclitaxel.Approved, Vet Approved
PaliperidoneTizanidine may increase the QTc-prolonging activities of Paliperidone.Approved
PanobinostatTizanidine may increase the QTc-prolonging activities of Panobinostat.Approved, Investigational
PapaverineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Papaverine.Approved
ParaldehydeTizanidine may increase the central nervous system depressant (CNS depressant) activities of Paraldehyde.Approved
ParoxetineThe serum concentration of Tizanidine can be increased when it is combined with Paroxetine.Approved, Investigational
PasireotideTizanidine may increase the bradycardic activities of Pasireotide.Approved
PazopanibTizanidine may increase the QTc-prolonging activities of Pazopanib.Approved
Peginterferon alfa-2aThe serum concentration of Tizanidine can be increased when it is combined with Peginterferon alfa-2a.Approved, Investigational
Peginterferon alfa-2bThe serum concentration of Tizanidine can be increased when it is combined with Peginterferon alfa-2b.Approved
PenbutololTizanidine may increase the atrioventricular blocking (AV block) activities of Penbutolol.Approved, Investigational
PentamidineTizanidine may increase the QTc-prolonging activities of Pentamidine.Approved
PentazocineThe risk or severity of adverse effects can be increased when Pentazocine is combined with Tizanidine.Approved, Vet Approved
PentobarbitalThe risk or severity of adverse effects can be increased when Pentobarbital is combined with Tizanidine.Approved, Vet Approved
PentoxifyllineThe serum concentration of Tizanidine can be increased when it is combined with Pentoxifylline.Approved, Investigational
PerampanelPerampanel may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved
PerazineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Perazine.Investigational
PerflutrenTizanidine may increase the QTc-prolonging activities of Perflutren.Approved
PerindoprilTizanidine may increase the hypotensive activities of Perindopril.Approved
PerospironeThe risk or severity of adverse effects can be increased when Perospirone is combined with Tizanidine.Approved
PerphenazineThe serum concentration of Tizanidine can be increased when it is combined with Perphenazine.Approved
PethidineThe risk or severity of adverse effects can be increased when Pethidine is combined with Tizanidine.Approved
PhenelzineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Phenelzine.Approved
PhenobarbitalThe metabolism of Tizanidine can be increased when combined with Phenobarbital.Approved
PhenoxybenzamineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Phenoxybenzamine.Approved
PhenoxyethanolThe risk or severity of adverse effects can be increased when Phenoxyethanol is combined with Tizanidine.Approved
PhentolamineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Phentolamine.Approved
PhenytoinThe risk or severity of adverse effects can be increased when Phenytoin is combined with Tizanidine.Approved, Vet Approved
PimozideTizanidine may increase the QTc-prolonging activities of Pimozide.Approved
PindololTizanidine may increase the atrioventricular blocking (AV block) activities of Pindolol.Approved
PipamperoneThe risk or severity of adverse effects can be increased when Pipamperone is combined with Tizanidine.Approved
PipotiazineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Pipotiazine.Approved
PiritramideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Piritramide.Investigational
PizotifenThe risk or severity of adverse effects can be increased when Tizanidine is combined with Pizotifen.Approved
PomalidomideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Pomalidomide.Approved
Poractant alfaTizanidine may increase the bradycardic activities of Poractant alfa.Approved
PractololTizanidine may increase the atrioventricular blocking (AV block) activities of Practolol.Approved
PramipexoleTizanidine may increase the sedative activities of Pramipexole.Approved, Investigational
PramocaineThe risk or severity of adverse effects can be increased when Pramocaine is combined with Tizanidine.Approved
PrazepamThe risk or severity of adverse effects can be increased when Prazepam is combined with Tizanidine.Approved, Illicit
PrazosinThe risk or severity of adverse effects can be increased when Prazosin is combined with Tizanidine.Approved
PregabalinThe risk or severity of adverse effects can be increased when Pregabalin is combined with Tizanidine.Approved, Illicit, Investigational
PregnanoloneThe risk or severity of adverse effects can be increased when Tizanidine is combined with Pregnanolone.Investigational
PrilocaineThe risk or severity of adverse effects can be increased when Prilocaine is combined with Tizanidine.Approved
PrimaquineTizanidine may increase the QTc-prolonging activities of Primaquine.Approved
PrimidoneThe metabolism of Tizanidine can be increased when combined with Primidone.Approved, Vet Approved
ProcainamideTizanidine may increase the QTc-prolonging activities of Procainamide.Approved
ProcaineThe risk or severity of adverse effects can be increased when Procaine is combined with Tizanidine.Approved, Investigational, Vet Approved
ProchlorperazineThe risk or severity of adverse effects can be increased when Prochlorperazine is combined with Tizanidine.Approved, Vet Approved
PromazineTizanidine may increase the QTc-prolonging activities of Promazine.Approved, Vet Approved
PromethazineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Promethazine.Approved
PropafenoneThe serum concentration of Tizanidine can be increased when it is combined with Propafenone.Approved
ProparacaineThe risk or severity of adverse effects can be increased when Proparacaine is combined with Tizanidine.Approved, Vet Approved
PropofolThe serum concentration of Tizanidine can be increased when it is combined with Propofol.Approved, Investigational, Vet Approved
PropoxycaineThe risk or severity of adverse effects can be increased when Propoxycaine is combined with Tizanidine.Approved
PropranololThe serum concentration of Tizanidine can be increased when it is combined with Propranolol.Approved, Investigational
ProtriptylineProtriptyline may decrease the antihypertensive activities of Tizanidine.Approved
PSD502The risk or severity of adverse effects can be increased when PSD502 is combined with Tizanidine.Investigational
QuazepamThe risk or severity of adverse effects can be increased when Quazepam is combined with Tizanidine.Approved, Illicit
QuetiapineTizanidine may increase the QTc-prolonging activities of Quetiapine.Approved
QuinaprilTizanidine may increase the hypotensive activities of Quinapril.Approved, Investigational
QuinidineTizanidine may increase the QTc-prolonging activities of Quinidine.Approved
QuinineTizanidine may increase the QTc-prolonging activities of Quinine.Approved
RacloprideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Raclopride.Investigational
RamelteonThe risk or severity of adverse effects can be increased when Tizanidine is combined with Ramelteon.Approved, Investigational
RamiprilTizanidine may increase the hypotensive activities of Ramipril.Approved
RanitidineThe serum concentration of Tizanidine can be increased when it is combined with Ranitidine.Approved
RasagilineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Rasagiline.Approved
RemifentanilThe risk or severity of adverse effects can be increased when Remifentanil is combined with Tizanidine.Approved
RemoxiprideThe risk or severity of adverse effects can be increased when Remoxipride is combined with Tizanidine.Approved, Withdrawn
RescinnamineTizanidine may increase the hypotensive activities of Rescinnamine.Approved
ReserpineThe risk or severity of adverse effects can be increased when Reserpine is combined with Tizanidine.Approved
RifampicinThe metabolism of Tizanidine can be increased when combined with Rifampicin.Approved
RiociguatThe risk or severity of adverse effects can be increased when Tizanidine is combined with Riociguat.Approved
RisperidoneTizanidine may increase the hypotensive activities of Risperidone.Approved, Investigational
RitanserinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Ritanserin.Investigational
RivastigmineTizanidine may increase the bradycardic activities of Rivastigmine.Approved, Investigational
RomifidineThe risk or severity of adverse effects can be increased when Romifidine is combined with Tizanidine.Vet Approved
RopiniroleThe serum concentration of Tizanidine can be increased when it is combined with Ropinirole.Approved, Investigational
RopivacaineThe risk or severity of adverse effects can be increased when Ropivacaine is combined with Tizanidine.Approved
RotigotineTizanidine may increase the sedative activities of Rotigotine.Approved
RufinamideThe risk or severity of adverse effects can be increased when Rufinamide is combined with Tizanidine.Approved
RuxolitinibRuxolitinib may increase the bradycardic activities of Tizanidine.Approved
S-EthylisothioureaThe risk or severity of adverse effects can be increased when S-Ethylisothiourea is combined with Tizanidine.Experimental
SacubitrilThe risk or severity of adverse effects can be increased when Tizanidine is combined with Sacubitril.Approved
Sage 547The risk or severity of adverse effects can be increased when Tizanidine is combined with Sage 547.Investigational
SaquinavirTizanidine may increase the QTc-prolonging activities of Saquinavir.Approved, Investigational
ScopolamineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Scopolamine.Approved
SecobarbitalThe risk or severity of adverse effects can be increased when Secobarbital is combined with Tizanidine.Approved, Vet Approved
SelegilineThe serum concentration of Tizanidine can be increased when it is combined with Selegiline.Approved, Investigational, Vet Approved
SertindoleThe risk or severity of adverse effects can be increased when Sertindole is combined with Tizanidine.Approved, Withdrawn
SertralineThe serum concentration of Tizanidine can be increased when it is combined with Sertraline.Approved
SevofluraneThe risk or severity of adverse effects can be increased when Sevoflurane is combined with Tizanidine.Approved, Vet Approved
SilodosinSilodosin may decrease the vasoconstricting activities of Tizanidine.Approved
SimeprevirThe serum concentration of Tizanidine can be increased when it is combined with Simeprevir.Approved
Sodium NitriteThe risk or severity of adverse effects can be increased when Tizanidine is combined with Sodium Nitrite.Approved
Sodium oxybateSodium oxybate may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved
Sodium phenylbutyrateThe serum concentration of Tizanidine can be increased when it is combined with Sodium phenylbutyrate.Approved
SotalolTizanidine may increase the atrioventricular blocking (AV block) activities of Sotalol.Approved
SpiraprilTizanidine may increase the hypotensive activities of Spirapril.Approved
SpironolactoneSpironolactone may decrease the vasoconstricting activities of Tizanidine.Approved
StiripentolThe risk or severity of adverse effects can be increased when Tizanidine is combined with Stiripentol.Approved
StreptokinaseThe risk or severity of adverse effects can be increased when Tizanidine is combined with Streptokinase.Approved
SufentanilTizanidine may increase the bradycardic activities of Sufentanil.Approved, Investigational
SulconazoleThe serum concentration of Tizanidine can be increased when it is combined with Sulconazole.Approved
SulfisoxazoleTizanidine may increase the QTc-prolonging activities of Sulfisoxazole.Approved, Vet Approved
SulpirideThe risk or severity of adverse effects can be increased when Sulpiride is combined with Tizanidine.Approved
SuvorexantTizanidine may increase the central nervous system depressant (CNS depressant) activities of Suvorexant.Approved
Synthetic Conjugated Estrogens, AThe serum concentration of Tizanidine can be increased when it is combined with Synthetic Conjugated Estrogens, A.Approved
TamsulosinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tamsulosin.Approved, Investigational
TandospironeThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tandospirone.Investigational
TapentadolTapentadol may increase the central nervous system depressant (CNS depressant) activities of Tizanidine.Approved
TasimelteonThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tasimelteon.Approved
TelavancinTizanidine may increase the QTc-prolonging activities of Telavancin.Approved
TelithromycinTizanidine may increase the QTc-prolonging activities of Telithromycin.Approved
TelmisartanThe risk or severity of adverse effects can be increased when Tizanidine is combined with Telmisartan.Approved, Investigational
TemazepamThe risk or severity of adverse effects can be increased when Temazepam is combined with Tizanidine.Approved
TemocaprilTizanidine may increase the hypotensive activities of Temocapril.Experimental, Investigational
TenofovirThe serum concentration of Tizanidine can be increased when it is combined with Tenofovir.Approved, Investigational
TerazosinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Terazosin.Approved
TeriflunomideThe serum concentration of Tizanidine can be decreased when it is combined with Teriflunomide.Approved
TetrabenazineTizanidine may increase the QTc-prolonging activities of Tetrabenazine.Approved
TetracaineThe risk or severity of adverse effects can be increased when Tetracaine is combined with Tizanidine.Approved, Vet Approved
TetrodotoxinThe risk or severity of adverse effects can be increased when Tetrodotoxin is combined with Tizanidine.Investigational
ThalidomideTizanidine may increase the central nervous system depressant (CNS depressant) activities of Thalidomide.Approved, Investigational, Withdrawn
TheophyllineThe serum concentration of Tizanidine can be increased when it is combined with Theophylline.Approved
ThiamylalThe risk or severity of adverse effects can be increased when Thiamylal is combined with Tizanidine.Approved, Vet Approved
ThiopentalThe risk or severity of adverse effects can be increased when Thiopental is combined with Tizanidine.Approved, Vet Approved
ThioridazineThe serum concentration of Tizanidine can be increased when it is combined with Thioridazine.Approved
ThiothixeneThe risk or severity of adverse effects can be increased when Thiothixene is combined with Tizanidine.Approved
TiagabineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tiagabine.Approved
TianeptineTianeptine may decrease the antihypertensive activities of Tizanidine.Approved
TiaprideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tiapride.Investigational
TiclopidineThe serum concentration of Tizanidine can be increased when it is combined with Ticlopidine.Approved
TiletamineThe risk or severity of adverse effects can be increased when Tiletamine is combined with Tizanidine.Vet Approved
TimololTizanidine may increase the atrioventricular blocking (AV block) activities of Timolol.Approved
TioconazoleThe serum concentration of Tizanidine can be increased when it is combined with Tioconazole.Approved
TofacitinibTofacitinib may increase the bradycardic activities of Tizanidine.Approved, Investigational
TolazolineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tolazoline.Approved, Vet Approved
TolcaponeThe risk or severity of adverse effects can be increased when Tolcapone is combined with Tizanidine.Approved, Withdrawn
TopiramateThe risk or severity of adverse effects can be increased when Topiramate is combined with Tizanidine.Approved
TorasemideThe risk or severity of adverse effects can be increased when Torasemide is combined with Tizanidine.Approved
ToremifeneTizanidine may increase the QTc-prolonging activities of Toremifene.Approved, Investigational
TramadolThe risk or severity of adverse effects can be increased when Tramadol is combined with Tizanidine.Approved, Investigational
TrandolaprilTizanidine may increase the hypotensive activities of Trandolapril.Approved
Trans-2-PhenylcyclopropylamineThe risk or severity of adverse effects can be increased when Trans-2-Phenylcyclopropylamine is combined with Tizanidine.Experimental
TranylcypromineThe risk or severity of adverse effects can be increased when Tranylcypromine is combined with Tizanidine.Approved
TrazodoneThe risk or severity of adverse effects can be increased when Trazodone is combined with Tizanidine.Approved, Investigational
TretinoinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Tretinoin.Approved, Investigational, Nutraceutical
TriamtereneThe risk or severity of adverse effects can be increased when Triamterene is combined with Tizanidine.Approved
TriazolamThe risk or severity of adverse effects can be increased when Triazolam is combined with Tizanidine.Approved
TrifluoperazineThe risk or severity of adverse effects can be increased when Trifluoperazine is combined with Tizanidine.Approved
TriflupromazineThe risk or severity of adverse effects can be increased when Triflupromazine is combined with Tizanidine.Approved, Vet Approved
TrimazosinTrimazosin may decrease the vasoconstricting activities of Tizanidine.Experimental
TrimipramineTrimipramine may decrease the antihypertensive activities of Tizanidine.Approved
TriprolidineThe risk or severity of adverse effects can be increased when Triprolidine is combined with Tizanidine.Approved
Uc1010The risk or severity of adverse effects can be increased when Tizanidine is combined with Uc1010.Investigational
ValaciclovirThe serum concentration of Tizanidine can be increased when it is combined with Valaciclovir.Approved, Investigational
Valproic AcidThe risk or severity of adverse effects can be increased when Valproic Acid is combined with Tizanidine.Approved, Investigational
ValsartanThe risk or severity of adverse effects can be increased when Valsartan is combined with Tizanidine.Approved, Investigational
VandetanibTizanidine may increase the QTc-prolonging activities of Vandetanib.Approved
VemurafenibThe serum concentration of Tizanidine can be increased when it is combined with Vemurafenib.Approved
VenlafaxineVenlafaxine may increase the tachycardic activities of Tizanidine.Approved
VerapamilThe serum concentration of Tizanidine can be increased when it is combined with Verapamil.Approved
VigabatrinThe risk or severity of adverse effects can be increased when Tizanidine is combined with Vigabatrin.Approved
VortioxetineThe risk or severity of adverse effects can be increased when Vortioxetine is combined with Tizanidine.Approved
XylazineThe risk or severity of adverse effects can be increased when Xylazine is combined with Tizanidine.Vet Approved
ZafirlukastThe serum concentration of Tizanidine can be increased when it is combined with Zafirlukast.Approved, Investigational
ZaleplonThe risk or severity of adverse effects can be increased when Zaleplon is combined with Tizanidine.Approved, Illicit, Investigational
ZiconotideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Ziconotide.Approved
ZileutonThe serum concentration of Tizanidine can be increased when it is combined with Zileuton.Approved, Investigational, Withdrawn
ZimelidineThe risk or severity of adverse effects can be increased when Tizanidine is combined with Zimelidine.Withdrawn
ZiprasidoneTizanidine may increase the QTc-prolonging activities of Ziprasidone.Approved
ZolazepamThe risk or severity of adverse effects can be increased when Zolazepam is combined with Tizanidine.Vet Approved
ZolpidemTizanidine may increase the central nervous system depressant (CNS depressant) activities of Zolpidem.Approved
ZonisamideThe risk or severity of adverse effects can be increased when Tizanidine is combined with Zonisamide.Approved, Investigational
ZopicloneThe risk or severity of adverse effects can be increased when Zopiclone is combined with Tizanidine.Approved
ZotepineThe risk or severity of adverse effects can be increased when Zotepine is combined with Tizanidine.Approved
ZuclopenthixolTizanidine may increase the QTc-prolonging activities of Zuclopenthixol.Approved, Investigational
Food InteractionsNot Available
References
Synthesis Reference

Pavel Hradil, Lubomir Kvapil, Martin Grepl, Jan Novotny, “METHOD FOR THE PREPARATION OF TIZANIDINE HYDROCHLORIDE.” U.S. Patent US20110263863, issued October 27, 2011.

US20110263863
General ReferencesNot Available
External Links
ATC CodesM03BX02
AHFS Codes
  • 12:20.00
PDB EntriesNot Available
FDA labelDownload (145 KB)
MSDSNot Available
ADMET
Predicted ADMET features
PropertyValueProbability
Human Intestinal Absorption+1.0
Blood Brain Barrier+0.8592
Caco-2 permeable+0.5323
P-glycoprotein substrateSubstrate0.6545
P-glycoprotein inhibitor INon-inhibitor0.8365
P-glycoprotein inhibitor IINon-inhibitor0.7953
Renal organic cation transporterInhibitor0.6577
CYP450 2C9 substrateNon-substrate0.7953
CYP450 2D6 substrateNon-substrate0.8018
CYP450 3A4 substrateNon-substrate0.5795
CYP450 1A2 substrateNon-inhibitor0.5248
CYP450 2C9 inhibitorNon-inhibitor0.7117
CYP450 2D6 inhibitorNon-inhibitor0.7867
CYP450 2C19 inhibitorNon-inhibitor0.6353
CYP450 3A4 inhibitorNon-inhibitor0.781
CYP450 inhibitory promiscuityHigh CYP Inhibitory Promiscuity0.5
Ames testNon AMES toxic0.6538
CarcinogenicityNon-carcinogens0.8915
BiodegradationNot ready biodegradable1.0
Rat acute toxicity2.6573 LD50, mol/kg Not applicable
hERG inhibition (predictor I)Weak inhibitor0.6935
hERG inhibition (predictor II)Non-inhibitor0.8907
ADMET data is predicted using admetSAR, a free tool for evaluating chemical ADMET properties. (23092397 )
Pharmacoeconomics
Manufacturers
  • Acorda therapeutics inc
  • Actavis elizabeth llc
  • Actavis totowa llc
  • Alphapharm party ltd
  • Apotex inc
  • Barr laboratories inc
  • Caraco pharmaceutical laboratories ltd
  • Corepharma llc
  • Dr reddys laboratories inc
  • Ivax pharmaceuticals inc sub teva pharmaceuticals usa
  • Mylan pharmaceuticals inc
  • Sandoz inc
  • Teva pharmaceuticals usa inc
Packagers
Dosage forms
FormRouteStrength
Kit
TabletOral4 mg
TabletOral2 mg
TabletOral4.576 mg/1
Capsule, gelatin coatedOral2 mg/1
Capsule, gelatin coatedOral4 mg/1
Capsule, gelatin coatedOral6 mg/1
TabletOral2 mg/1
TabletOral4 mg/1
CapsuleOral2 mg/1
CapsuleOral4 mg/1
CapsuleOral6 mg/1
Prices
Unit descriptionCostUnit
Zanaflex 6 mg capsule4.79USD capsule
Zanaflex 4 mg capsule3.2USD capsule
Zanaflex 2 mg capsule2.52USD capsule
Zanaflex 4 mg tablet2.29USD tablet
Tizanidine hcl 4 mg tablet1.49USD tablet
Zanaflex 2 mg tablet1.42USD tablet
Tizanidine hcl 2 mg tablet1.25USD tablet
DrugBank does not sell nor buy drugs. Pricing information is supplied for informational purposes only.
Patents
Patent NumberPediatric ExtensionApprovedExpires (estimated)
US6455557 No2001-11-282021-11-28Us
Properties
StateSolid
Experimental Properties
PropertyValueSource
logP1.4Not Available
Predicted Properties
PropertyValueSource
Water Solubility0.133 mg/mLALOGPS
logP1.6ALOGPS
logP2.02ChemAxon
logS-3.3ALOGPS
pKa (Strongest Basic)7.49ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count5ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area62.2 Å2ChemAxon
Rotatable Bond Count1ChemAxon
Refractivity64.77 m3·mol-1ChemAxon
Polarizability23.97 Å3ChemAxon
Number of Rings3ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Mass Spec (NIST)Not Available
Spectra
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, NegativeNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, NegativeNot Available
MSMass Spectrum (Electron Ionization)splash10-0udi-5490000000-5ee0610f321160b63c82View in MoNA
Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as benzothiadiazoles. These are heterocyclic aromatic compounds containing a benzene ring fused to a thiadiazole ring. Thiadiazole is a five-membered aromatic heterocycle made up of one sulfur atom and two nitrogen atoms.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassBenzothiadiazoles
Sub ClassNot Available
Direct ParentBenzothiadiazoles
Alternative Parents
Substituents
  • 2,1,3-benzothiadiazole
  • Benzenoid
  • Aryl halide
  • Aryl chloride
  • Heteroaromatic compound
  • Thiadiazole
  • 2-imidazoline
  • Azole
  • Guanidine
  • Azacycle
  • Organic 1,3-dipolar compound
  • Propargyl-type 1,3-dipolar organic compound
  • Carboximidamide
  • Hydrocarbon derivative
  • Organonitrogen compound
  • Organochloride
  • Organohalogen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors

Targets

Kind
Protein
Organism
Human
Pharmacological action
unknown
Actions
agonist
General Function:
Thioesterase binding
Specific Function:
Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is oxymetazoline > clonidine > epinephrine > norepinephrine > phenylephrine > dopamine > p-synephrine > p-tyramine > serotonin = p-octopamine. For antagonists, the rank order is yohimbine > phentolamine = mianser...
Gene Name:
ADRA2A
Uniprot ID:
P08913
Molecular Weight:
48956.275 Da
References
  1. Piletz JE, Zhu H, Chikkala DN: Comparison of ligand binding affinities at human I1-imidazoline binding sites and the high affinity state of alpha-2 adrenoceptor subtypes. J Pharmacol Exp Ther. 1996 Nov;279(2):694-702. [PubMed:8930173 ]
Kind
Protein
Organism
Human
Pharmacological action
yes
Actions
agonist
General Function:
Epinephrine binding
Specific Function:
Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins. The rank order of potency for agonists of this receptor is clonidine > norepinephrine > epinephrine = oxymetazoline > dopamine > p-tyramine = phenylephrine > serotonin > p-synephrine / p-octopamine. For antagonists, the rank order is yohimbine > chlorpromazine > phent...
Gene Name:
ADRA2B
Uniprot ID:
P18089
Molecular Weight:
49565.8 Da
References
  1. Piletz JE, Zhu H, Chikkala DN: Comparison of ligand binding affinities at human I1-imidazoline binding sites and the high affinity state of alpha-2 adrenoceptor subtypes. J Pharmacol Exp Ther. 1996 Nov;279(2):694-702. [PubMed:8930173 ]
Kind
Protein
Organism
Human
Pharmacological action
yes
Actions
agonist
General Function:
Protein homodimerization activity
Specific Function:
Alpha-2 adrenergic receptors mediate the catecholamine-induced inhibition of adenylate cyclase through the action of G proteins.
Gene Name:
ADRA2C
Uniprot ID:
P18825
Molecular Weight:
49521.585 Da
References
  1. Piletz JE, Zhu H, Chikkala DN: Comparison of ligand binding affinities at human I1-imidazoline binding sites and the high affinity state of alpha-2 adrenoceptor subtypes. J Pharmacol Exp Ther. 1996 Nov;279(2):694-702. [PubMed:8930173 ]
Kind
Protein
Organism
Human
Pharmacological action
no
Actions
agonist
General Function:
Phosphatidylinositol binding
Specific Function:
Acts either as the functional imidazoline-1 receptor (I1R) candidate or as a membrane-associated mediator of the I1R signaling. Binds numerous imidazoline ligands that induces initiation of cell-signaling cascades triggering to cell survival, growth and migration. Its activation by the agonist rilmenidine induces an increase in phosphorylation of mitogen-activated protein kinases MAPK1 and MAPK...
Gene Name:
NISCH
Uniprot ID:
Q9Y2I1
Molecular Weight:
166627.105 Da
References
  1. Rolon PA: Myxoglobulosis of the appendix. Int Surg. 1977 Jun-Jul;62(6-7):355-6. [PubMed:893017 ]

Enzymes

Kind
Protein
Organism
Human
Pharmacological action
unknown
Actions
substrate
General Function:
Oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
Specific Function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Most active in catalyzing 2-hydroxylation. Caffeine is metabolized primarily by cytochrome CYP1A2 in the liver through an initial N...
Gene Name:
CYP1A2
Uniprot ID:
P05177
Molecular Weight:
58293.76 Da
References
  1. Wang B, Zhou SF: Synthetic and natural compounds that interact with human cytochrome P450 1A2 and implications in drug development. Curr Med Chem. 2009;16(31):4066-218. [PubMed:19754423 ]
  2. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. doi: 10.1093/nar/gkp970. Epub 2009 Nov 24. [PubMed:19934256 ]
  3. Shellenberger MK, Groves L, Shah J, Novack GD: A controlled pharmacokinetic evaluation of tizanidine and baclofen at steady state. Drug Metab Dispos. 1999 Feb;27(2):201-4. [PubMed:9929503 ]
  4. Drug Interactions: Cytochrome P450 Drug Interaction Table [Link]
Comments
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Drug created on June 13, 2005 07:24 / Updated on August 17, 2016 12:23