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Identification
NameKetazolam
Accession NumberDB01587
Typesmall molecule
Groupsapproved
Description

Ketazolam is a drug which is a benzodiazepine derivative. It possesses anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties. Ketazolam is not approved for sale in the United States or Canada.

Structure
Thumb
SynonymsNot Available
SaltsNot Available
Brand namesNot Available
Brand mixturesNot Available
CategoriesNot Available
CAS number27223-35-4
WeightAverage: 368.814
Monoisotopic: 368.092770127
Chemical FormulaC20H17ClN2O3
InChI KeyInChIKey=PWAJCNITSBZRBL-UHFFFAOYSA-N
InChI
InChI=1S/C20H17ClN2O3/c1-13-10-18(24)23-12-19(25)22(2)17-9-8-15(21)11-16(17)20(23,26-13)14-6-4-3-5-7-14/h3-11H,12H2,1-2H3
IUPAC Name
14-chloro-4,10-dimethyl-2-phenyl-3-oxa-7,10-diazatricyclo[9.4.0.0^{2,7}]pentadeca-1(11),4,12,14-tetraene-6,9-dione
SMILES
CN1C2=C(C=C(Cl)C=C2)C2(OC(C)=CC(=O)N2CC1=O)C1=CC=CC=C1
Mass SpecNot Available
Taxonomy
KingdomOrganic Compounds
SuperclassHeterocyclic Compounds
ClassBenzodiazepines
SubclassNot Available
Direct parentBenzodiazepines
Alternative parentsChlorobenzenes; Aryl Chlorides; Tertiary Carboxylic Acid Amides; Tertiary Amines; Polyamines; Dialkyl Ethers; Carboxylic Acids; Organochlorides
Substituentschlorobenzene; aryl chloride; aryl halide; benzene; tertiary carboxylic acid amide; tertiary amine; carboxamide group; carboxylic acid derivative; carboxylic acid; dialkyl ether; polyamine; organochloride; organohalogen; amine; organonitrogen compound
Classification descriptionThis compound belongs to the benzodiazepines. These are organic compounds containing a benzene ring fused to either isomers of diazepine(unsaturated seven-member heterocycle with two nitrogen atoms replacing two carbon atoms).
Pharmacology
IndicationKetazolam could be used for the treatment of anxiety. In approved countries, it is indicated for the treatment of anxiety, tension, irritability and similar stress related symptoms.
PharmacodynamicsBenzodiazepines enhance the effect of the neurotransmitter gamma-aminobutyric acid (GABA), which results in sedative, hypnotic, anxiolytic, anticonvulsant, muscle relaxant and amnesic action. Benzodiazepines bind nonspecifically to benzodiazepine receptors which mediate sleep, affects muscle relaxation, anticonvulsant activity, motor coordination, and memory. As benzodiazepine receptors are thought to be coupled to gamma-aminobutyric acid-A (GABAA) receptors, this enhances the effects of GABA by increasing GABA affinity for the GABA receptor. Binding of GABA to the site opens the chloride channel, resulting in a hyperpolarized cell membrane that prevents further excitation of the cell.
Mechanism of actionBenzodiazepines share a similar chemical structure and their effects in humans are mainly produced by the allosteric modification of a specific kind of neurotransmitter receptor, the GABAA receptor, which increases the conductance of this inhibitory channel; this results in the various therapeutic effects as well as adverse effects of benzodiazepines. Binding of benzodiazepines to this receptor complex promotes binding of GABA, which in turn increases the conduction of chloride ions across the neuronal cell membrane. This increased conductance raises the membrane potential of the neuron resulting in inhibition of neuronal firing. In addition, different GABAA receptor subtypes have varying distributions within different regions of the brain and therefore control distinct neuronal circuits. Hence, activation of different GABAA receptor subtypes by benzodiazepines may result in distinct pharmacological actions.
AbsorptionNot Available
Volume of distributionNot Available
Protein bindingNot Available
Metabolism

Ketazolam breaks down in the blood to diazepam which breaks down to demoxepam which breaks down to desmethyldiazepam.

Route of eliminationDiazepam and its metabolites are excreted mainly in the urine, predominantly as their glucuronide conjugates.
Half life26-200 hours
ClearanceNot Available
ToxicitySymptoms of overdose include somnolence, confusion, coma, and diminished reflexes. Respiration, pulse and blood pressure should be monitored.
Affected organismsNot Available
PathwaysNot Available
SNP Mediated EffectsNot Available
SNP Mediated Adverse Drug ReactionsNot Available
ADMET
Predicted ADMET features
Property Value Probability
Human Intestinal Absorption + 0.9965
Blood Brain Barrier + 0.9382
Caco-2 permeable + 0.7069
P-glycoprotein substrate Substrate 0.7006
P-glycoprotein inhibitor I Inhibitor 0.6305
P-glycoprotein inhibitor II Non-inhibitor 0.8837
Renal organic cation transporter Non-inhibitor 0.7534
CYP450 2C9 substrate Non-substrate 0.8193
CYP450 2D6 substrate Non-substrate 0.8504
CYP450 3A4 substrate Substrate 0.7504
CYP450 1A2 substrate Non-inhibitor 0.5878
CYP450 2C9 substrate Inhibitor 0.5154
CYP450 2D6 substrate Non-inhibitor 0.9257
CYP450 2C19 substrate Inhibitor 0.5938
CYP450 3A4 substrate Inhibitor 0.6037
CYP450 inhibitory promiscuity Low CYP Inhibitory Promiscuity 0.52
Ames test Non AMES toxic 0.7228
Carcinogenicity Non-carcinogens 0.789
Biodegradation Not ready biodegradable 1.0
Rat acute toxicity 1.8992 LD50, mol/kg Not applicable
hERG inhibition (predictor I) Weak inhibitor 0.9935
hERG inhibition (predictor II) Non-inhibitor 0.8687
Pharmacoeconomics
ManufacturersNot Available
PackagersNot Available
Dosage forms
FormRouteStrength
CapsuleOral15
CapsuleOral30
PricesNot Available
PatentsNot Available
Properties
Statesolid
Experimental PropertiesNot Available
Predicted Properties
PropertyValueSource
water solubility8.39e-02 g/lALOGPS
logP2.6ALOGPS
logP3.01ChemAxon
logS-3.6ALOGPS
pKa (strongest acidic)14.2ChemAxon
pKa (strongest basic)-0.89ChemAxon
physiological charge0ChemAxon
hydrogen acceptor count3ChemAxon
hydrogen donor count0ChemAxon
polar surface area49.85ChemAxon
rotatable bond count1ChemAxon
refractivity99.78ChemAxon
polarizability36.96ChemAxon
number of rings4ChemAxon
bioavailability1ChemAxon
rule of fiveYesChemAxon
Ghose filterYesChemAxon
Veber's ruleNoChemAxon
MDDR-like ruleNoChemAxon
Spectra
SpectraNot Available
References
Synthesis ReferenceNot Available
General ReferenceNot Available
External Links
ResourceLink
PubChem Compound33746
PubChem Substance46507008
ChemSpider31110
PharmGKBPA164749385
WikipediaKetazolam
ATC CodesN05BA10
AHFS CodesNot Available
PDB EntriesNot Available
FDA labelNot Available
MSDSNot Available
Interactions
Drug Interactions
Drug
CimetidineCimetidine may increase the effect of the benzodiazepine, ketazolam.
ClozapineIncreased risk of toxicity
OmeprazoleOmeprazole may increase the effect of the benzodiazepine, ketazolam.
Food Interactions
  • Avoid alcohol
  • Avoid excessive quantities of coffee or tea (caffeine).
  • Avoid taking with grapefruit or grapefruit juice as grapefruit can significantly increase serum levels of this product.
  • Take with food.

1. Translocator protein

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: agonist

Components

Name UniProt ID Details
Translocator protein P30536 Details

References:

  1. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. Pubmed
  2. Falchi AM, Battetta B, Sanna F, Piludu M, Sogos V, Serra M, Melis M, Putzolu M, Diaz G: Intracellular cholesterol changes induced by translocator protein (18 kDa) TSPO/PBR ligands. Neuropharmacology. 2007 Aug;53(2):318-29. Epub 2007 Jun 2. Pubmed
  3. Vega D, Fernandez D, Echeverria G: Ketazolam. Acta Crystallogr C. 2001 Jul;57(Pt 7):848-50. Epub 2001 Jul 9. Pubmed

2. Gamma-aminobutyric acid receptor subunit alpha-1

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: potentiator

Components

Name UniProt ID Details
Gamma-aminobutyric acid receptor subunit alpha-1 P14867 Details

References:

  1. Blaschke G, Kley H, Muller WE: [Racemation of the benzodiazepines camazepam and ketazolam and receptor binding of enantiomers]. Arzneimittelforschung. 1986 Jun;36(6):893-4. Pubmed
  2. Mohler H, Fritschy JM, Rudolph U: A new benzodiazepine pharmacology. J Pharmacol Exp Ther. 2002 Jan;300(1):2-8. Pubmed
  3. Riss J, Cloyd J, Gates J, Collins S: Benzodiazepines in epilepsy: pharmacology and pharmacokinetics. Acta Neurol Scand. 2008 Aug;118(2):69-86. Epub 2008 Mar 31. Pubmed
  4. Derry JM, Dunn SM, Davies M: Identification of a residue in the gamma-aminobutyric acid type A receptor alpha subunit that differentially affects diazepam-sensitive and -insensitive benzodiazepine site binding. J Neurochem. 2004 Mar;88(6):1431-8. Pubmed

3. Gamma-aminobutyric acid receptor subunit beta-1

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: potentiator

Components

Name UniProt ID Details
Gamma-aminobutyric acid receptor subunit beta-1 P18505 Details

References:

  1. Mohler H, Fritschy JM, Rudolph U: A new benzodiazepine pharmacology. J Pharmacol Exp Ther. 2002 Jan;300(1):2-8. Pubmed
  2. Riss J, Cloyd J, Gates J, Collins S: Benzodiazepines in epilepsy: pharmacology and pharmacokinetics. Acta Neurol Scand. 2008 Aug;118(2):69-86. Epub 2008 Mar 31. Pubmed
  3. Derry JM, Dunn SM, Davies M: Identification of a residue in the gamma-aminobutyric acid type A receptor alpha subunit that differentially affects diazepam-sensitive and -insensitive benzodiazepine site binding. J Neurochem. 2004 Mar;88(6):1431-8. Pubmed
  4. Blaschke G, Kley H, Muller WE: [Racemation of the benzodiazepines camazepam and ketazolam and receptor binding of enantiomers]. Arzneimittelforschung. 1986 Jun;36(6):893-4. Pubmed

4. Gamma-aminobutyric acid receptor subunit gamma-1

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: potentiator

Components

Name UniProt ID Details
Gamma-aminobutyric acid receptor subunit gamma-1 Q8N1C3 Details

References:

  1. Mohler H, Fritschy JM, Rudolph U: A new benzodiazepine pharmacology. J Pharmacol Exp Ther. 2002 Jan;300(1):2-8. Pubmed
  2. Riss J, Cloyd J, Gates J, Collins S: Benzodiazepines in epilepsy: pharmacology and pharmacokinetics. Acta Neurol Scand. 2008 Aug;118(2):69-86. Epub 2008 Mar 31. Pubmed

5. Gamma-aminobutyric acid receptor subunit delta

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: potentiator

Components

Name UniProt ID Details
Gamma-aminobutyric acid receptor subunit delta O14764 Details

References:

  1. Mohler H, Fritschy JM, Rudolph U: A new benzodiazepine pharmacology. J Pharmacol Exp Ther. 2002 Jan;300(1):2-8. Pubmed
  2. Riss J, Cloyd J, Gates J, Collins S: Benzodiazepines in epilepsy: pharmacology and pharmacokinetics. Acta Neurol Scand. 2008 Aug;118(2):69-86. Epub 2008 Mar 31. Pubmed

6. Gamma-aminobutyric acid receptor subunit epsilon

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: potentiator

Components

Name UniProt ID Details
Gamma-aminobutyric acid receptor subunit epsilon P78334 Details

References:

  1. Mohler H, Fritschy JM, Rudolph U: A new benzodiazepine pharmacology. J Pharmacol Exp Ther. 2002 Jan;300(1):2-8. Pubmed
  2. Riss J, Cloyd J, Gates J, Collins S: Benzodiazepines in epilepsy: pharmacology and pharmacokinetics. Acta Neurol Scand. 2008 Aug;118(2):69-86. Epub 2008 Mar 31. Pubmed

1. Cytochrome P450 3A4

Kind: protein

Organism: Human

Pharmacological action: unknown

Actions: substrate inhibitor

Components

Name UniProt ID Details
Cytochrome P450 3A4 P08684 Details

References:

  1. Flockhart DA. Drug Interactions: Cytochrome P450 Drug Interaction Table. Indiana University School of Medicine (2007). Accessed May 28, 2010.
  2. Zhou SF, Zhou ZW, Yang LP, Cai JP: Substrates, inducers, inhibitors and structure-activity relationships of human Cytochrome P450 2C9 and implications in drug development. Curr Med Chem. 2009;16(27):3480-675. Epub 2009 Sep 1. Pubmed
  3. 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. Epub 2009 Nov 24. Pubmed

1. Serum albumin

Kind: protein

Organism: Human

Pharmacological action: unknown

Components

Name UniProt ID Details
Serum albumin P02768 Details

References:

  1. Bertucci C, Wainer IW: Improved chromatographic performance of a modified human albumin based stationary phase. Chirality. 1997;9(4):335-40. Pubmed
  2. Brodersen R, Honore B: Drug binding properties of neonatal albumin. Acta Paediatr Scand. 1989 May;78(3):342-6. Pubmed

1. Multidrug resistance protein 1

Kind: protein

Organism: Human

Pharmacological action: unknown

Actions: substrate

Components

Name UniProt ID Details
Multidrug resistance protein 1 P08183 Details

References:

  1. Yamazaki M, Neway WE, Ohe T, Chen I, Rowe JF, Hochman JH, Chiba M, Lin JH: In vitro substrate identification studies for p-glycoprotein-mediated transport: species difference and predictability of in vivo results. J Pharmacol Exp Ther. 2001 Mar;296(3):723-35. Pubmed
  2. Adachi Y, Suzuki H, Sugiyama Y: Comparative studies on in vitro methods for evaluating in vivo function of MDR1 P-glycoprotein. Pharm Res. 2001 Dec;18(12):1660-8. Pubmed

Comments
Drug created on August 29, 2007 09:28 / Updated on September 16, 2013 17:15