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Fentanyl patch heat exposure — GPhC CRA MCQ

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HardCNS TherapeuticsFentanyl patch heat exposureGPhC CRA

A 68-year-old woman using a fentanyl 25 micrograms/hour patch for cancer pain asks about using a heat pad for back stiffness. She has had a fever of 38.7°C since yesterday and feels unusually drowsy. What would you advise the patient?

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Correct answer: D — Avoid external heat and seek urgent medical advice because fentanyl exposure may increase

Heat and fever can increase transdermal fentanyl absorption and raise opioid toxicity risk. Unusual drowsiness is a concerning symptom that requires urgent medical assessment. Patches should not be cut, and dose changes should be prescriber-led. The patient should avoid heat sources over or near the patch and receive safety-netting about respiratory depression.

Reference: BNF