Home oxygen smoking risk — GPhC CRA MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: D — Methylthioninium chloride can precipitate serotonin syndrome with sertraline
Explanation lettering: D = shown as A · C = shown as B · E = shown as C · A = shown as D · B = shown as E
A is correct: methylthioninium chloride is an MAO inhibitor, and serious or fatal serotonin syndrome has occurred with serotonergic medicines including SSRIs; urgent use requires specialist risk–benefit assessment, consideration of alternatives and close monitoring. B invents a folate mechanism. C describes neither drug’s relevant pharmacology. D reverses the concern, which is serotonergic toxicity rather than chelation. E is chemically false.
Reference: Proveblue methylthioninium chloride SmPC. https://www.medicines.org.uk/emc/product/6898/smpc