Lithium toxicity monitoring — GPhC CRA MCQ
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Correct answer: E — Urgent lithium level, renal function and electrolyte assessment
Dehydration reduces lithium clearance and thiazides can further raise its concentration. Tremor and ataxia suggest toxicity, so lithium should be withheld pending urgent clinical assessment, a correctly interpreted concentration, renal function and electrolytes.
Reference: BNF: lithium carbonate: https://bnf.nice.org.uk/drugs/lithium-carbonate/