Emergency Medical Minute

Contributor: Taylor Lynch, MD Educational Pearls: What is tramadol and how does it work? Tramadol is a Schedule IV opioid analgesic used for moderate pain and is often perceived as safer than other opioids due to lower abuse potential. It is a prodrug with weak direct μ-opioid receptor activity. The parent compound also inhibits serotonin and norepinephrine reuptake, giving it SSRI/SNRI-like properties. Tramadol is metabolized by CYP2D6 into O-desmethyltramadol (ODT), which has significantly stronger μ-opioid receptor agonism than the parent drug. What are the concerns with tramadol? Ultrarapid CYP2D6 metabolizers (more common in Middle Eastern and North African populations) rapidly convert tramadol to ODT, increasing the risk of opioid toxicity. Poor CYP2D6 metabolizers generate little ODT and may experience primarily serotonergic effects, increasing the risk of serotonin syndrome, especially when combined with SSRIs or SNRIs. CYP2D6 inhibitors (e.g., bupropion, paroxetine, terbinafine, celec