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GTN storage advice — GPhC CRA MCQ

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EasyDispensingGTN storage adviceGPhC CRA

A community pharmacist receives a prescription for glyceryl trinitrate (GTN) sublingual tablets 500 micrograms. The patient asks how to store them at home. What is the most appropriate advice?

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

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Correct answer: A — Keep them in the original glass container and replace eight weeks after opening

GTN sublingual tablets are unstable and must be stored in the original glass container with the foil-lined cap tightly closed. They should be discarded eight weeks after opening as they lose potency due to volatilisation and adsorption. They should not be transferred to other containers, including dosette boxes, as this accelerates degradation. Refrigeration is not required.

Reference: BNF; GTN SmPC