Ethinyl Estradiol + Gestodene Phenytoin
ModeratePhenytoin, along with rifampicin, primidone, rifabutin, dexamethasone, griseofulvin, topiramate, some protease inhibitors, modafinil, ritonavir and barbiturates, may lower the level of ethinyl estradiol in the blood.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.