SHEET /m/phenytoin · PubChem CID 1775 · CAS 57-41-0 · REV 2026.07
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Phenytoin
from sourceC15H12N2O2 · 252.27 g/mol
diphenylhydantoin · Dihycon · Dihydantoin · Dilabid
What is Phenytoin?
An anticonvulsant sold as Dilantin, in use since 1938. It was the first seizure medicine found that did not also sedate. from source
CategoryPrescription medicine
Fig. 1 · 2D structure RDKit
SMILES
C1=CC=C(C=C1)C2(C(=O)NC(=O)N2)C3=CC=CC=C3Where you'll find it
Dispensed on prescription, not sold on a shelf. See the rest of the prescription medicine group.
Relative acute toxicity from source
Animal study data · LD50
- Reported LD50
- 1,635 mg/kg · low toxicity
- Species
- rat
- Route
- oral
An LD50 describes acute toxicity under experimental conditions and is not a safe or dangerous dose for a person.
Toxicity & hazards
Toxicity · LD50
1,635 mg/kg · low toxicity · LD50 rat oral from source
4 more reported values
- 150 mg/kgLD50 · oral · mouse
- 100 mg/kgLD50 · other · mouse
- 101 mg/kgLD50 · iv · rat
- 110 mg/kgLD50 · other · mouse
DangerIrritantHealth hazardH302, H340, H350, H351, H360, H370, H372, H402, H412from source
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Where Phenytoin leads
Relatedcomputed