Prescription-, Illicit-, and Self-Harm Opioid Overdose Cases Treated in Hospital

Objective:Research suggests unintentional overdose on prescription drugs and intentional self-harm cases differ fundamentally from unintentional illicit drug overdoses, but there are few data on opioid overdose per se.Method:We analyzed consecutive opioid overdose patients age 13 and over (N = 435) treated by a toxicology consult service to compare three poisoning groups: unintentional illicit drug (illicit, n = 128), unintentional prescription drug (prescription, n = 217), and intentional self-harm (self-harm, n = 90). The groups were compared on key characteristics of the poisoning events (severity, co-ingestion of non-opioid) and the hospital-based treatments required to manage the poisonings (use of antidote, provision of pharmacological support). Logistic regressions yielded incident rate ratios (IRRs) and 95% confidence intervals (CI) adjusted for age and sex.Results:Compared to the illicit group, the prescription group was more likely to co-ingest a non-opioid drug (IRR [95% CI] = 1.594 [1.077, 2.3...