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Epilepsy contraception interaction — GPhC CRA MCQ

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HardCNS TherapeuticsEpilepsy contraception interactionGPhC CRA

A patient taking carbamazepine for epilepsy asks for emergency hormonal contraception after unprotected sex 24 hours ago. They also use a combined oral contraceptive but missed pills. What is the most appropriate action?

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Correct answer: D — Refer for copper intrauterine device discussion or suitable adjusted emergency contraception

Carbamazepine is an enzyme inducer and can reduce the effectiveness of hormonal contraception, including some emergency contraception options. A copper intrauterine device is the most effective emergency contraception and avoids enzyme induction. If oral emergency contraception is used, specialist or PGD guidance on adjusted dosing and suitability is needed. The patient also needs ongoing contraception review.

Reference: BNF; FSRH guidance