Pharmaceutical and OTC drug misuse — structured clinical viva

This is not a trivial gastroenterology side-story. Mega-dose loperamide is used for opioid effects or withdrawal self-treatment and is associated with cardiac dysrhythmia and death (Eggleston; FAERS cardiotoxicity signals). Psychiatry/addiction involvement is mandatory once medical stabilisation begins.^[1][2]

Priorities. ABC and continuous cardiac monitoring; 12-lead ECG (QRS/QTc); electrolytes; toxicology/cardiology liaison; naloxone if respiratory depression while recognising that unstable arrhythmia care dominates. Prolonged observation may be required.^[1][2]

Addiction formulation. Pharmaceutical/prescription opioid dependence with loss of OAT continuity — a high-relapse, high-mortality window — now complicated by cardiotoxic self-medication. Offer OAT re-induction carefully after the gap (not automatic return to a prior high methadone dose), take-home naloxone for future opioid risk, and clear education that loperamide is dangerous at these doses.^[3][4]

Staff myth-busting. “OTC” is a retail category, not a safety grade. Qualitative literature shows patients minimise pharmacy-sourced dependence; clinicians must not collude.^[5]