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Identification
NameEthotoin
Accession NumberDB00754  (APRD00962)
TypeSmall Molecule
GroupsApproved
Description

Ethotoin is a hydantoin derivative and anticonvulsant. Ethotoin exerts an antiepileptic effect without causing general central nervous system depression. The mechanism of action is probably very similar to that of phenytoin. The latter drug appears to stabilize rather than to raise the normal seizure threshold, and to prevent the spread of seizure activity rather than to abolish the primary focus of seizure discharges. Ethotoin is no longer commonly used.

Structure
Thumb
Synonyms
SynonymLanguageCode
(+-)-3-Ethyl-5-phenylhydantoinNot AvailableNot Available
1-Ethyl-2,5-dioxo-4-phenylimidazolidineNot AvailableNot Available
3-Ethyl-5-phenyl-2,4-imidazolidinedioneNot AvailableNot Available
3-Ethyl-5-phenyl-imidazolidine-2,4-dioneNot AvailableNot Available
3-Ethyl-5-phenylhydantoinNot AvailableNot Available
3-Ethyl-5-phenylimidazolidin-2,4-dioneNot AvailableNot Available
EthotoinGermanINN
EthotoïneFrenchINN
EthotoinumLatinINN
EtotoinaSpanishINN
Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing End
Peganonetablet250 mgoralRECORDATI RARE DISEASES, INC.1957-04-22Not AvailableUs 0a2ef1ad1c84951dc1392a8bbe1f3cb241c91ed59e44ad8268635315440d978c
Generic Prescription ProductsNot Available
Over the Counter ProductsNot Available
International Brands
NameCompany
AccenonDainippon Sumitomo
PegoanoneNot Available
Brand mixturesNot Available
SaltsNot Available
Categories
CAS number86-35-1
WeightAverage: 204.2252
Monoisotopic: 204.089877638
Chemical FormulaC11H12N2O2
InChI KeySZQIFWWUIBRPBZ-UHFFFAOYSA-N
InChI
InChI=1S/C11H12N2O2/c1-2-13-10(14)9(12-11(13)15)8-6-4-3-5-7-8/h3-7,9H,2H2,1H3,(H,12,15)
IUPAC Name
3-ethyl-5-phenylimidazolidine-2,4-dione
SMILES
CCN1C(=O)NC(C1=O)C1=CC=CC=C1
Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as phenylhydantoins. These are heterocyclic aromatic compounds containing an imiazolidinedione moiety substituted by a phenyl group.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassAzolidines
Sub ClassImidazolidines
Direct ParentPhenylhydantoins
Alternative Parents
Substituents
  • 5-phenylhydantoin
  • Phenylimidazolidine
  • Ureide
  • Benzenoid
  • Monocyclic benzene moiety
  • Urea
  • Tertiary amine
  • Carboxamide group
  • Azacycle
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Amine
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External DescriptorsNot Available
Pharmacology
IndicationFor the control of tonic-clonic (grand mal) and complex partial (psychomotor) seizures.
PharmacodynamicsEthotoin is a hydantoin derivative and anticonvulsant. Ethotoin exerts an antiepileptic effect without causing general central nervous system depression. The mechanism of action is probably very similar to that of phenytoin. The latter drug appears to stabilize rather than to raise the normal seizure threshold, and to prevent the spread of seizure activity rather than to abolish the primary focus of seizure discharges.
Mechanism of actionThe mechanism of action is probably very similar to that of phenytoin. The latter drug appears to stabilize rather than to raise the normal seizure threshold, and to prevent the spread of seizure activity rather than to abolish the primary focus of seizure discharges. Ethotoin inhibits nerve impulses in the motor cortex by lowering sodium ion influx, limiting tetanic stimulation.
AbsorptionFairly rapidly absorbed, however, the extent of oral absorption is not known.
Volume of distributionNot Available
Protein bindingNot Available
Metabolism

Hepatic. The drug exhibits saturable metabolism with respect to the formation of N-deethyl and p-hydroxyl-ethotoin, the major metabolites.

SubstrateEnzymesProduct
Ethotoin
Not Available
p-Hydroxyl-ethotoinDetails
Route of eliminationNot Available
Half life3 to 9 hours
ClearanceNot Available
ToxicitySymptoms of overdose include drowsiness, loss of or impaired muscle coordination, nausea, visual disturbance, and, at very high doses, coma.
Affected organisms
  • Humans and other mammals
PathwaysNot Available
SNP Mediated EffectsNot Available
SNP Mediated Adverse Drug ReactionsNot Available
ADMET
Predicted ADMET features
PropertyValueProbability
Human Intestinal Absorption+1.0
Blood Brain Barrier+0.9936
Caco-2 permeable+0.5629
P-glycoprotein substrateNon-substrate0.592
P-glycoprotein inhibitor INon-inhibitor0.8358
P-glycoprotein inhibitor IINon-inhibitor0.9401
Renal organic cation transporterNon-inhibitor0.8532
CYP450 2C9 substrateNon-substrate0.7507
CYP450 2D6 substrateNon-substrate0.9115
CYP450 3A4 substrateNon-substrate0.7383
CYP450 1A2 substrateNon-inhibitor0.9045
CYP450 2C9 substrateNon-inhibitor0.914
CYP450 2D6 substrateNon-inhibitor0.9619
CYP450 2C19 substrateNon-inhibitor0.9025
CYP450 3A4 substrateNon-inhibitor0.8591
CYP450 inhibitory promiscuityLow CYP Inhibitory Promiscuity0.8483
Ames testNon AMES toxic0.7056
CarcinogenicityNon-carcinogens0.8655
BiodegradationNot ready biodegradable0.8423
Rat acute toxicity2.1653 LD50, mol/kg Not applicable
hERG inhibition (predictor I)Weak inhibitor0.886
hERG inhibition (predictor II)Non-inhibitor0.8724
Pharmacoeconomics
Manufacturers
  • Lundbeck inc
Packagers
Dosage forms
FormRouteStrength
Tabletoral250 mg
Prices
Unit descriptionCostUnit
Peganone 250 mg tablet1.33USD tablet
DrugBank does not sell nor buy drugs. Pricing information is supplied for informational purposes only.
PatentsNot Available
Properties
StateSolid
Experimental Properties
PropertyValueSource
melting point94 °CPhysProp
water solubility5280 mg/LNot Available
logP1.05SANGSTER (1994)
Predicted Properties
PropertyValueSource
Water Solubility2.38 mg/mLALOGPS
logP1.11ALOGPS
logP1.07ChemAxon
logS-1.9ALOGPS
pKa (Strongest Acidic)11.29ChemAxon
pKa (Strongest Basic)-8.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area49.41 Å2ChemAxon
Rotatable Bond Count2ChemAxon
Refractivity55.05 m3·mol-1ChemAxon
Polarizability20.68 Å3ChemAxon
Number of Rings2ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Mass Spec (NIST)Download (8.5 KB)
SpectraMS
References
Synthesis Reference

Close, W.J.; U.S. Patent 2,793,157; May 21, 1957; assigned to Abbott Laboratories.

General Reference
  1. SCHWADE ED, RICHARDS RK, EVERETT GM: Peganone, a new antiepileptic drug. Dis Nerv Syst. 1956 May;17(5):155-8. Pubmed
External Links
ATC CodesN03AB01
AHFS CodesNot Available
PDB EntriesNot Available
FDA labelNot Available
MSDSNot Available
Interactions
Drug Interactions
Drug
AlprazolamEthotoin may increase the metabolism of alprazolam via CYP3A4.
AminophyllineDecreased effect of both products
AmiodaroneIncreases the effect of hydantoin
AprepitantThe CYP3A4 inducer, ethotoin, may decrease the effect of aprepitant.
BetamethasoneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, betamethasone.
CapecitabineCapecitabine increases the effect of hydantoin
ChloramphenicolIncreases phenytoin, modifies chloramphenicol
ChlordiazepoxideEthotoin may increase the metabolism of chlordiazepoxide via CYP3A4.
ChlorphenamineThe antihistamine increases the effect of hydantoin
CimetidineIncreases the effect of hydantoin
CiprofloxacinDecreases the hydantoin effect
ClomifeneThe enzyme inducer, ethotoin, decreases the effect of the hormone agent, clomifene.
ClorazepateEthotoin may increase the metabolism of clorazepate via CYP3A4.
ClozapineHydantoin decreases the effect of clozapine
Conjugated EstrogensThe enzyme inducer, ethotoin, decreases the effect of the hormone agent, conjugated estrogens.
CyclosporineThe hydantoin decreases the effect of cyclosporine
DexamethasoneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, dexamethasone.
DiazepamEthotoin may increase the metabolism of diazepam via CYP3A4.
DiethylstilbestrolThe enzyme inducer, ethotoin, decreases the effect of the hormone agent, diethylstilbestrol.
DisopyramideThe hydantoin decreases the effect of disopyramide
DisulfiramIncreases the effect of phenytoin
DoxycyclineThe anticonvulsant, ethotoin, decreases the effect of doxycycline.
EstradiolThe enzyme inducer, ethotoin, decreases the effect of the hormone agent, estradiol.
Ethinyl EstradiolThis product may cause a slight decrease of contraceptive effect
FelbamateIncreased phenytoin levels and decreased felbamate levels
FelodipineThe hydantoin decreases the effect of felodipine
FluconazoleIncreases the effect of hydantoin
FludrocortisoneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, fludrocortisone.
FluorouracilFluorouracil increases the effect of hydantoin
FluoxetineFluoxetine increases the effect of phenytoin
FlurazepamEthotoin may increase the metabolism of flurazepam via CYP3A4.
FluvoxamineIncreases the effect of hydantoin
Folic AcidFolic acid decreases the levels of hydantoin
FurosemideThe hydantoin decreases the effect of furosemide
GabapentinIncreases the effect of hydantoin
GefitinibThe CYP3A4 inducer, ethotoin, may decrease the serum concentration and therapeutic effects of gefitinib.
HydrocortisoneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, hydrocortisone.
ImatinibThe hydantoin decreases the levels of imatinib
IsoniazidIsoniazid increases the effect of phenytoin in 20% of patients
ItraconazolePhenytoin decreases the effect of itraconazole
LamotriginePhenytoin may reduce levels of lamotrigine
LevonorgestrelPhenytoin decreases the contraceptive effect
MebendazoleThe hydantoin decreases the efficiency of mebendazole
Medroxyprogesterone AcetateThe enzyme inducer, ethotoin, decreases the effect of the hormone agent, medroxyprogesterone.
Megestrol acetateThe enzyme inducer, ethotoin, decreases the effect of the hormone agent, megestrol.
MethadoneThe hydantoin decreases the effect of methadone
MethotrexateThe antineoplasic agent decreases the effect of hydantoin
MethoxsalenThe hydantoin decreases the effect of psoralene
MexiletineThe hydantoin decreases the effect of mexiletine
MidazolamEthotoin may increase the metabolism of midazolam via CYP3A4.
MirtazapineThe hydantoins may reduce mirtazapine plasma concentrations and pharmacological effects
NorethindroneThis product may cause a slight decrease of contraceptive effect
OmeprazoleOmeprazole increases the effect of hydantoin
OxcarbazepineOxcarbazepine increases the effect of hydantoin
OxtriphyllineDecreased effect of both products
OxyphenbutazoneThe NSAID, oxyphenbutazone, may increase the hydantoin effect of ethotoin.
PhenylbutazoneThe NSAID, phenylbutazone, may increase the hydantoin effect of ethotoin.
PrednisoloneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, prednisolone.
PrednisoneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, prednisone.
QuetiapinePhenytoin decreases the effect of quetiapine
RifampicinRifampin decreases the effect of the hydantoin
TheophyllineDecreased effect of both products
TiclopidineTiclopidine increases the effect of hydantoin
TriamcinoloneThe enzyme inducer, ethotoin, may decrease the effect of the corticosteroid, triamcinolone.
TriazolamEthotoin may increase the metabolism of triazolam via CYP3A4.
TriprolidineThe CNS depressants, Triprolidine and Ethotoin, may increase adverse/toxic effects due to additivity. Monitor for increased CNS depressant effects during concomitant therapy.
Food InteractionsNot Available

Targets

1. Sodium channel protein type 5 subunit alpha

Kind: protein

Organism: Human

Pharmacological action: yes

Actions: inhibitor

Components

Name UniProt ID Details
Sodium channel protein type 5 subunit alpha Q14524 Details

References:

  1. Overington JP, Al-Lazikani B, Hopkins AL: How many drug targets are there? Nat Rev Drug Discov. 2006 Dec;5(12):993-6. Pubmed
  2. Imming P, Sinning C, Meyer A: Drugs, their targets and the nature and number of drug targets. Nat Rev Drug Discov. 2006 Oct;5(10):821-34. Pubmed
  3. Lenkowski PW, Ko SH, Anderson JD, Brown ML, Patel MK: Block of human NaV1.5 sodium channels by novel alpha-hydroxyphenylamide analogues of phenytoin. Eur J Pharm Sci. 2004 Apr;21(5):635-44. Pubmed
  4. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. Pubmed

Enzymes

1. Cytochrome P450 2C19

Kind: protein

Organism: Human

Pharmacological action: unknown

Actions: inhibitor

Components

Name UniProt ID Details
Cytochrome P450 2C19 P33261 Details

References:

  1. 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

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Drug created on June 13, 2005 07:24 / Updated on April 22, 2014 10:40