Phenytoin interactions on FDA labels
These are pairs with Phenytoin where an FDA label names an interaction, grouped by the desk's grade. A drug that isn't listed here hasn't been cleared as safe with Phenytoin; it just isn't on this list. Open any pair in the desk to see it alongside other drugs.
Avoid together
Enzyme roles on the desk
Educational reference only. Not FDA-cleared. The Prescribing Information governs.