• Russell Bardsley.
• Emergency Department, Catholic Medical Center, Manchester, NH.
• Am J Health Syst Pharm. 2019 Oct 30; 76 (22): 1835-1837.

PurposeCarfentanil is a synthetic opioid with an estimated potency that is 10,000 times more than that of morphine and 100 times more than that of fentanyl. Although there is a paucity of evidence, when considering the potency of carfentanil, it is reasonable to speculate that larger doses of naloxone may be required to resuscitate patients after carfentanil ingestion. This case report discusses the use of high-dose naloxone in 2 patients with suspected carfentanil overdose presenting to a small community hospital.SummaryTwo patients with suspected carfentanil overdose presented to a 30-bed emergency department at a community hospital in New Hampshire. Cyanosis and respiratory distress were noted in both instances, and airway intervention was ultimately deemed necessary. Patient 1 required a total of 12 mg of naloxone to be successfully resuscitated, while patient 2 required a total of 10 mg for resuscitation. Both patients were successfully resuscitated with high doses of naloxone. The use of high-dose naloxone prevented the need for intubation in these patients.ConclusionWhile more robust studies should be considered, emergency personnel should be comfortable using higher-than-standard doses of naloxone in appropriate cases.© American Society of Health-System Pharmacists 2019. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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