a) Certain anticonvulsants,(phenytoin, carbamazepine, barbiturates, primidone, topiramate, oxcarbazepine)
2
Clarification: Although the interaction of certain anticonvulsants with LNG/ETG implants is not harmful to women, it is likely to reduce the effectiveness of LNG/ETG implants. Use of other contraceptives should be encouraged for women who are long-term users of any of these drugs.