Phenobarbital and phenytoin reduce the effects of oral contraceptives.

Question

Quizplus · Accepted Answer

Phenobarbital and phenytoin are known to increase the metabolism of estrogen and progestin hormones present in oral contraceptives, thus reducing their effectiveness in preventing pregnancy. Women who take these medications along with oral contraceptives should consider using alternate forms of birth control or consult with their healthcare provider for appropriate adjustments in dosage or medication.

Phenobarbital and Phenytoin Reduce the Effects of Oral Contraceptives