skip to main content

Lithium monitoring — GPhC CRA MCQ

Instant feedback + full explanation. One question, done properly.

EasyCNS TherapeuticsLithium monitoringGPhC CRA

A 52-year-old woman has been stable on lithium for bipolar disorder for several years. She collects her prescription and asks why the GP checks blood tests even when she feels well. What monitoring is required?

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

Reveal the answer and explanation

Correct answer: A — Lithium level, renal function and thyroid function at regular intervals

Lithium has a narrow therapeutic index and requires regular serum lithium monitoring. Renal and thyroid function also need ongoing surveillance because lithium can impair both. Stable patients still require monitoring, with extra checks after dose changes, illness or interacting medicines.

Reference: BNF; NICE CKS