{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,16]],"date-time":"2026-06-16T22:33:02Z","timestamp":1781649182404,"version":"3.54.5"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T00:00:00Z","timestamp":1779148800000},"content-version":"vor","delay-in-days":138,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Critical Care"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>A 21\u2010year\u2010old woman was admitted to our emergency department following a 3\u2010h loss of consciousness after intentional ingestion of multiple psychotropic medications. Initial management included gastric lavage, catharsis, intravenous fluid resuscitation, diuresis, and hemoperfusion to enhance toxin elimination. Shortly after admission, she developed rapid respiratory deterioration, high fever, limb tremors, and tachycardia. Emergency endotracheal intubation and mechanical ventilation were initiated, along with sedation and active cooling measures. A comprehensive workup\u2014including complete blood count, procalcitonin (PCT), blood, urine, and sputum cultures, and chest CT\u2014was performed to exclude infectious etiologies. After ruling out other potential causes, a diagnosis of serotonin syndrome was related to quetiapine fumarate overdose. With aggressive supportive care and enhanced drug clearance, the patient gradually regained consciousness, achieved hemodynamic stability, and was successfully weaned from mechanical ventilation before being discharged without neurological sequelae. Clinicians should maintain a high index of suspicion for serotonin syndrome in patients with quetiapine overdose who present with altered mental status, autonomic instability, hyperthermia, and neuromuscular abnormalities. 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