Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Mephenytoin
Drug ID BADD_D01386
Description Mephenytoin is used for the treatment of refractory partial epilepsy. Mephenytoin is a solid. This compound belongs to the phenylhydantoins. These are heterocyclic aromatic compounds containing an imiazolidinedione moiety substituted by a phenyl group. Mephenytoin is known to target sodium channel protein type 5 subunit alpha. Cytochrome P450 2C19, Cytochrome P450 2C8, Cytochrome P450 2C9, Cytochrome P450 2B6, Cytochrome P450 1A2, and Cytochrome P450 2D6 are known to metabolize mephenytoin. Mephenytoin is a hydantoin-derivative anticonvulsant used to control various partial seizures. Mephenytoin and oxazolidinedione derivatives are associated with higher incidences of blood dyscrasias compared to other anticonvulsants.
Indications and Usage For the treatment of refractory partial epilepsy.
Marketing Status approved; investigational; withdrawn
ATC Code N03AB04
DrugBank ID DB00532
KEGG ID D00375
MeSH ID D008617
PubChem ID 4060
TTD Drug ID D07RGW
NDC Product Code Not Available
UNII R420KW629U
Synonyms Mephenytoin | 5-Ethyl-3-Methyl-5-Phenylhydantoin | 5 Ethyl 3 Methyl 5 Phenylhydantoin | Mefenetoin | Methoin | Methyl Phenetoin | Phenetoin, Methyl | Phenantoin | Mesantoin
Chemical Information
Molecular Formula C12H14N2O2
CAS Registry Number 50-12-4
SMILES CCC1(C(=O)N(C(=O)N1)C)C2=CC=CC=C2
Chemical Structure
ADRs Induced by Drug
*The priority for ADR severity classification is based on FAERS assessment, followed by the most severe level in CTCAE rating. If neither is available, it will be displayed as 'Not available'.
**The 'Not Available' level is hidden by default and can be restored by clicking on the legend twice..
ADR Term ADReCS ID ADR Frequency (FAERS) ADR Severity Grade (FAERS) ADR Severity Grade (CTCAE)
Agranulocytosis01.02.03.001--Not Available
Alopecia23.02.02.001--
Anaemia01.03.02.001--
Anaemia megaloblastic14.12.01.003; 01.03.02.003--Not Available
Aplastic anaemia01.03.03.002--Not Available
Arthropathy15.01.01.003--Not Available
Asthenia08.01.01.001--Not Available
Ataxia17.02.02.001; 08.01.02.004--
Chorea17.01.01.001--Not Available
Confusional state19.13.01.001; 17.02.03.005--
Conjunctivitis06.04.01.002; 11.01.06.012--
Death08.04.01.001--
Depression19.15.01.001--
Dermatitis23.03.04.002--Not Available
Dermatitis exfoliative23.03.07.001; 10.01.01.004--
Diplopia17.17.01.005; 06.02.06.002--Not Available
Dizziness02.11.04.006; 24.06.02.007; 17.02.05.003--
Dysarthria19.19.03.001; 17.02.08.001--
Eosinophilia01.02.04.001--
Erythema multiforme10.01.03.015; 23.03.01.003--
Fatigue08.01.01.002--
Feeling abnormal08.01.09.014--Not Available
Gingival hypertrophy07.09.13.008--Not Available
Haemolytic anaemia01.06.03.002--Not Available
Hepatitis09.01.07.004--Not Available
Hodgkin's disease16.31.01.001; 01.16.01.001--Not Available
Hodgkin's disease lymphocyte depletion type stage unspecified16.31.03.001; 01.16.03.001--Not Available
Hodgkin's disease lymphocyte predominance type stage unspecified16.31.04.001; 01.16.04.001--Not Available
Hypersensitivity10.01.03.003--
Insomnia17.15.03.002; 19.02.01.002--
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