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Lithium monitoring — GPhC CRA MCQ

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EasyCNS TherapeuticsLithium monitoringGPhC CRA

A stable patient taking lithium modified-release tablets asks which routine blood tests are important. The GP has requested tests before issuing further repeats. What monitoring is required?

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Correct answer: C — Lithium level, renal function, thyroid function, calcium, and weight or BMI

Lithium requires therapeutic drug monitoring because the therapeutic range is narrow. Renal and thyroid function, calcium, and weight or BMI should also be monitored due to recognised long-term adverse effects. INR and respiratory tests are not routine lithium safety monitoring.

Reference: BNF; NICE CKS