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Lamotrigine combined pill — GPhC CRA MCQ

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ModerateDrug InteractionsLamotrigine combined pillGPhC CRA

A woman taking lamotrigine starts a combined oral contraceptive. What is the most important interaction to flag?

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

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Correct answer: ACombined hormonal contraception can lower lamotrigine concentrations and affect seizure control

Oestrogen-containing contraception can increase lamotrigine clearance. In this scenario, the pharmacist should prioritise safe supply, appropriate counselling and timely referral or clarification where needed. This is the single best answer because the other options would either delay assessment, ignore a clinically significant risk, or create an unsafe legal or professional outcome.

Reference: BNF