Inquest into the death of Hugh David LISLE

24y · Male·cardio-respiratory arrest due to multi-drug toxicity

Hugh Lisle, a 24-year-old man with severe chronic arthritis, depression, polysubstance addiction and gambling disorder, died in a private psychiatric facility after admission for substance withdrawal management. Death resulted from cardio-respiratory arrest due to multi-drug toxicity involving prescribed sedatives (diazepam, clonazepam, mirtazapine, quetiapine) combined with illicitly obtained buprenorphine. Clinical lessons include: monitoring for signs of excessive sedation despite therapeutic dosing; ensuring robust communication systems for clinically significant observations (patient drug-seeking behaviour); strict medication administration oversight; and maintaining advanced life support training for all staff in high-risk psychiatric facilities. While psychiatrist-led care was appropriate and resuscitation attempts were made immediately, there were deficiencies in documenting and escalating concerning behaviours, managing patient leave appropriately, and in resuscitation training and technique (CPR performed on bed rather than firm surface, confusion regarding defibrillator use). The patient's access to non-prescribed buprenorphine despite being in supervised care highlights medication security gaps.