Norix 1 Levonorgestrel [For emergency contraception] Carbamazepine
ModerateLevonorgestrel [for emergency contraception] may not work as well if you take it with carbamazepine. Carbamazepine belongs to a group of anti-seizure medicines, along with phenobarbitone, phenytoin and primidone, that can reduce or even stop the emergency contraceptive from working. Rifampicin and griseofulvin can do the same.
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.