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Enzyme inducer and EC — DFSRH MCQ

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HardEmergency contraceptionEnzyme inducer and ECDFSRH

A 28-year-old woman on carbamazepine had UPSI 48 hours ago. She declines copper IUD and wants an oral emergency method. What is the most appropriate management?

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Correct answer: D — Offer double-dose levonorgestrel with counselling

Enzyme-inducing medicines reduce oral EC effectiveness; Cu-IUD is preferred. If declined, double-dose levonorgestrel is used with counselling, whereas ulipristal is not recommended with enzyme inducers. A follow-up pregnancy test is needed.

Reference: FSRH Emergency Contraception Guideline 2017 amended 2023; FSRH UPA breastfeeding statement 2025; BNF