Coroner's Finding: Porteous, Shayne Edward

59y · Male·mixed drug toxicity (tramadol and sertraline), likely serotonin syndrome

A 59-year-old man died from mixed drug toxicity involving tramadol and sertraline, likely precipitating serotonin syndrome. He was prescribed tramadol 150mg morning and 100mg evening (total 250mg daily), but evidence indicates he consumed double this dose (approximately 500mg daily), exceeding safe guidelines. When his sertraline was increased from 100mg to 150mg for emotional instability—symptoms potentially representing early serotonin toxicity—the combined high-dose serotonergic agents created a life-threatening interaction. The pharmacy dispensed medications at a rate consistent with double-dosing but failed to question this pattern, monitor for drug interactions, or communicate with the prescriber. Key clinical lessons include: recognizing serotonin syndrome symptoms (emotional instability, irritability, agitation, autonomic dysfunction); vigilant monitoring when combining tramadol with SSRIs; pharmacist responsibility to detect inappropriate dosing patterns and counsel patients on complex medication changes; and interdisciplinary communication between prescribers and dispensers to prevent tragic drug interactions.