Phenytoin - Interactions

Interactions

Phenytoin is an inducer of the CYP3A4 and CYP2C19 families of the P450 enzyme responsible for the hepatic degradation of various drugs.

Warfarin (Coumadin) and Trimethoprim increase serum phenytoin levels and prolong the serum half-life of phenytoin by inhibiting its metabolism.

  • hydantoins
  • fosphenytoin
  • mephenytoin
  • ethotoin

Read more about this topic:  Phenytoin

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