Home › Severe Interactions › Phenytoin & Levonorgestrel
SEVERE

Phenytoin and Levonorgestrel Interaction

Phenytoin is predicted to decrease the efficacy of some contraceptive methods containing Levonorgestrel. For CoSRH guidance, see Contraceptives, interactions.

Evidence: Theoretical
View all Phenytoin interactions View all Levonorgestrel interactions

Other Phenytoin Interactions

Other Levonorgestrel Interactions

    Check interactions for your patient's full medication list

    InteractRx checks all drug combinations at once — built for GP surgery pharmacists.

    Use the Free Checker