Lithium long-term — GPhC CRA MCQ

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ModerateCNS TherapeuticsLithium long-termGPhC CRA

A patient on stable lithium asks why the GP keeps arranging blood tests. What monitoring is required?

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

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Correct answer: E — Serum lithium concentration, renal function and thyroid function

Lithium requires ongoing monitoring because toxicity, renal impairment and thyroid dysfunction can occur. In this vignette, "Serum lithium concentration, renal function and thyroid function" is the safest single best answer. The other options are less appropriate because they miss the key clinical risk, conflict with UK medicines guidance, or delay needed review.

Reference: BNF; NICE CKS