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Medicines phenytoinQuestion & answer

phenytoin · Medicine question

Which liver enzymes metabolise phenytoin?

iatroX medicinesPublished 8 November 2026

The answer

Answer

Phenytoin is metabolised by the liver cytochrome P450 enzymes CYP2C9 and CYP2C19.

Sources for this answer

Epanutin 30mg/5ml oral SuspensionViatris (formerly Mylan or Upjohn) · emc · SmPC §4.5 Interaction with other medicinal products · Version 28Document updated 2 February 2026

Sources checked 8 November 2026

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phenytoin

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