The American journal of emergency medicine
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Am J Emerg Med
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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. ⋯ Tramadol was identified in a subset of patients presenting to the Emergency Department with opioid overdoses suggesting adulteration of illicitly manufactured fentanyl with tramadol. Its presence was not associated with a lack of treatment response, difference in severity of overdose, or increased risk of complications.