Patients discharged from the emergency department after stimulant toxicity face a 1-year mortality rate of 2.1%, roughly 14 times higher than the rate among people of similar age in the general population, according to a study published on October 23, 2026, in The American Journal of Emergency Medicine. Overdose accounts for about two thirds of these deaths, with opioids contributing to more than half of those fatal overdoses.
In Plain English: The Clinical Takeaway
- Elevated Risk: Patients leaving the hospital after an emergency visit for stimulant toxicity face a high risk of dying within one year.
- Hidden Dangers: More than half of the overdose deaths following stimulant toxicity involve opioids, indicating dangerous substance mixing or contamination.
- Harm Reduction Window: Emergency department discharges present a critical opening for clinicians to distribute preventative resources.
Retrospective Cohort Tracking One-Year Mortality After Emergency Room Discharges
Led by Damilola Idowu, MD, of the Medical College of Wisconsin in Milwaukee, researchers conducted a retrospective cohort study examining records of 2356 patients discharged directly from the emergency department between 2018 and 2023. Every patient in the primary cohort carried a primary diagnosis of stimulant toxicity identified through International Classification of Diseases, Tenth Revision, or ICD-10, codes. These codes encompassed cocaine, amphetamines, methamphetamines, methylenedioxymethamphetamine, methylphenidate, other psychostimulants, and synthetic cannabinoids.
To establish a baseline comparison, the investigative team evaluated a reference group of 1665 patients discharged after an emergency department visit for opioid toxicity. The data revealed that a total of 46 patients from the stimulant cohort died within one year of discharge, yielding an estimated mortality rate of 2.1%. The median age of these decedents at their index emergency visit was 35 years, and the median time elapsed from discharge to death was 118 days. Methamphetamines and amphetamines accounted for 54% of the index diagnoses, while cocaine represented 24%.
| Patient Cohort | Sample Size (N) | 1-Year Mortality Rate | Median Time to Death |
|---|---|---|---|
| Stimulant Toxicity Discharge | 2356 | 2.1% | 118 days |
| Opioid Toxicity Discharge | 1665 | 6.9% | 174 days |
Overdose Mechanics and Substance Overlap in Wisconsin Patient Records
Among the patients in the stimulant cohort who died within the one-year follow-up window, 67% succumbed to an overdose. A granular examination of these fatal overdoses demonstrated that opioids were involved in 54% of the cases, whereas stimulants were detected in 48%. Both drug classes were present in 37% of these fatal events. By comparison, the reference cohort of patients treated for opioid toxicity experienced a 1-year mortality rate of 6.9%, with a median time to death of 174 days.
The administrative dataset carried distinct methodological limitations. Because researchers relied on ICD-10 codes to isolate stimulant-related emergency visits, the methodology may have missed certain cases or captured visits where stimulants were not the primary driver. Furthermore, investigators matched deaths using a hashed identifier derived from patient names, dates of birth, and sex rather than a unique personal identifier. This approach left room for missed matches stemming from misspelled names or incorrect birth dates. Because the dataset drew exclusively from Wisconsin state death records, out-of-state residents and state residents who died elsewhere were excluded from the mortality count.
Clinical Opportunities for Opioid-Focused Harm Reduction
Patients who required hospital admission following their index visit were excluded from the analysis under the presumption of greater illness severity, which could introduce selection bias. Additionally, the administrative records lacked granular details regarding social determinants of health and underlying patterns of substance use, and the data source held no prior records of stimulant-related emergency visits before 2018. Because the findings originated from a single Midwestern state, regional variations in the drug supply, including the balance of cocaine vs amphetamines and patterns of opioid contamination, may limit the applicability of the findings to other regions.
“ED encounters for stimulant toxicity identify patients at increased risk of subsequent mortality. Deaths were predominantly overdose-driven and frequently opioid-involved, suggesting that these encounters may represent an important opportunity for opioid-focused harm reduction and overdose prevention.”
wrote the authors in their published findings.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
