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Carbamazepine emergency contraception — GPhC CRA MCQ

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HardDrug InteractionsCarbamazepine emergency contraceptionGPhC CRA

A 25-year-old woman taking carbamazepine asks for emergency contraception 72 hours after unprotected sex. She has no contraindications and wants the most effective option. What is the most appropriate action?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: D — Refer urgently for a copper intrauterine device as the most effective option

Carbamazepine is an enzyme inducer and can reduce effectiveness of oral emergency contraception. The copper intrauterine device is the most effective emergency contraception and is not affected by enzyme induction. If oral options are considered, specialist guidance and dose considerations are needed.

Reference: BNF; FSRH guidance