Background: Tramadol is an adulterant of illicit opioids. As it is a serotonin-norepinephrine reuptake inhibitor as well as a μ-opioid agonist, tramadol adulteration may worsen overdose signs and symptoms or affect the amount of naloxone patients receive.
Methods: This is a multicenter, prospective cohort of adult patients with suspected opioid overdoses who presented to one of eight United States emergency departments and were included in the Toxicology Investigators Consortium's Fentalog Study.
Objectives: Although considerable focus has been placed on understanding the causes of opioid drug overdoses, the intentions for such overdoses are not well characterized. We investigated the motivations behind nonfatal opioid exposures resulting in serious adverse health outcomes.
Methods: We analyzed prospectively collected data on nonfatal opioid overdoses in the multicenter Toxicology Investigators Consortium (ToxIC) Core Registry between 2014 and 2021.