Epilepsy and contraception
Women of child bearing age who are sexually active and taking antiepileptic medicine should be made aware that some medications can interfere with the effectiveness of the oral contraceptive pill. Those who are seeking family planning advice should let the doctor or nurse know about the medication being taken so that appropriate advice can be given.
Some antiepileptic drugs can cause failure of hormonal contraceptives. The enzyme inducing antiepileptic drugs increase the rate at which the liver breaks down the contraceptive hormones.