A woman with previously well-controlled epilepsy on carbamazepine becomes pregnant while using the etonogestrel implant. She used no additional contra...

Question

A woman with previously well-controlled epilepsy on carbamazepine becomes pregnant while using the etonogestrel implant. She used no additional contraceptive precautions. This highlights which drug interaction?

Accepted Answer

Carbamazepine is a potent enzyme inducer that reduces the efficacy of the etonogestrel implant; she should have been switched to a method unaffected by enzyme inducers

Answer

No interaction was present

Answer

The implant was defective

Answer

Carbamazepine is only an enzyme inducer in pregnancy

Answer

Her implant must have been expired

uk-dfsrh MCQ (SBA): Pregnancy on Implant Carbamazepine Interaction Case

A woman with previously well-controlled epilepsy on carbamazepine becomes pregnant while using the etonogestrel implant. She used no additional contraceptive precautions. This highlights which drug interaction?