Drug Interaction Report

Fosphenytoin may significantly reduce the blood levels of ulipristal, which may make the medication less effective in treating your condition. If you are currently taking or have taken fosphenytoin within the past 4 weeks and are seeking emergency contraception, you should consider other options, as ulipristal may not be effective in preventing pregnancy under these circumstances. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.