Naloxone Administration and Survival Outcomes in Suspected Opioid-Associated Out-of-Hospital Cardiac Arrest

Article Impact Level: HIGH
Data Quality: STRONG
Summary of  JAMA Network Open https://doi.org/10.1001/jamanetworkopen.2026.15539
Dr. Ralph C. Wang et al.

Points

Opioid overdoses contribute to a growing number of out-of-hospital cardiac arrests and represent a critical evidence gap in prehospital resuscitation care protocols according to the American Heart Association.
A retrospective cohort study analyzed clinical records from 3,811 patients treated by emergency medical service personnel to evaluate the survival impacts of field naloxone administration.
Patients receiving naloxone achieved an 8.1% rate of survival to hospital discharge compared to a 4.4% survival rate observed among individuals who did not receive the medication.
Resuscitation with the opioid antagonist was independently associated with a 3.3% absolute increase in return of spontaneous circulation and a 3.2% improvement in favorable neurological outcomes.
The survival benefit climbed to approximately 8% to 9% in cases of suspected drug-related arrest but weakened significantly if patients also required epinephrine during resuscitation.

Summary

The impact of emergency medical service (EMS) naloxone administration on clinical outcomes in patients experiencing suspected opioid-associated out-of-hospital cardiac arrest (OA-OHCA). Opioid overdose mortality remains an ongoing public health challenge, contributing to an increasing volume of out-of-hospital cardiac arrests (OHCA). Although naloxone is standard therapy for acute opioid toxicity, its therapeutic utility during an established cardiac arrest has remained undefined. The American Heart Association has flagged this specific protocol as a critical evidence gap in resuscitation care. The research sought to determine if adding naloxone to standard resuscitation algorithms correlates with higher survival rates and improved neurological recovery.

Using a retrospective cohort design, the study analyzed clinical records from 3,811 patients with suspected OHCA compiled by the California Resuscitation Outcomes Consortium between 2021 and 2022. The data demonstrated that patients who received naloxone during EMS resuscitation achieved higher rates of survival to hospital discharge (8.1%) compared to those who did not receive the drug (4.4%). After adjusting for baseline patient and clinical covariates, naloxone administration was independently associated with a 2.8% absolute increase in survival to hospital discharge. Furthermore, the treated cohort exhibited an absolute improvement of 3.3% in the return of spontaneous circulation (ROSC) and a 3.2% increase in favorable neurological outcomes.

Subgroup analyses revealed that therapeutic benefits were most pronounced among patients with EMS-suspected drug-related cardiac arrest, where survival improvements approached 8% to 9%. However, the positive association between naloxone administration and survival was noticeably attenuated in patients who concurrently required epinephrine during resuscitation. This variation suggests that increased resuscitation complexity or delayed administration timelines may limit the drug’s absolute utility. While these retrospective findings suggest that naloxone may help reverse tissue-level hypoxia or opioid-induced cardiovascular depression during cardiac arrest, prospective randomized controlled trials are required to establish explicit causal relationships and relative risk ratios.

Link to the article: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2849629#google_vignette

References

Wang, R. C., Toy, J., Montoy, J. C. C., Tolles, J., Ehlers, P. F., Donofrio-Odmann, J. J., Menegazzi, J. J., Gausche-Hill, M., Rodriguez, R. M., Dillon, D. G., CAL-ROC Investigators, VanBuren, J. M., Bosson, N., Ballard, D. W., Breyre, A. M., Kidane, S., Konik, Z., Luoto, M., Mackey, K., … Kahn, C. A. (2026). Naloxone and clinical outcomes in suspected opioid-associated out-of-hospital cardiac arrests. JAMA Network Open, 9(5), e2615539. https://doi.org/10.1001/jamanetworkopen.2026.15539