Carbamazepine and contraception — GPhC CRA MCQ
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Correct answer: D — Reduced contraceptive effectiveness due to enzyme induction
Carbamazepine is an enzyme inducer and can reduce hormonal contraceptive effectiveness. This makes reduced contraceptive effectiveness due to enzyme induction the single best answer in this scenario. The other options would either miss the key safety issue, delay appropriate review, or fail to meet the relevant clinical or professional requirement.
Reference: BNF interactions; FSRH guidance