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Opioid renal failure — DGM MCQ

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HardEnd-of-life careOpioid renal failureDGM

An 89-year-old man with end-stage renal disease becomes drowsy and myoclonic after escalating analgesia. He has metastatic prostate cancer and poor oral intake. eGFR is 12 mL/min/1.73m2. Current medicines include morphine, senna and metoclopramide. Which medication should be reviewed?

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

Reveal the answer and explanation

Correct answer: AMorphine

Morphine metabolites accumulate in severe renal impairment and can cause drowsiness and myoclonus. Senna, metoclopramide, paracetamol and mouth care do not explain opioid neurotoxicity as directly. Renal function should guide opioid choice in palliative care.

Reference: BNF; palliative care guidance