A 19-year-old college student is brought to the ED with conf…
A 19-year-old college student is brought to the ED with confusion, diaphoresis, tremor, and hyperreflexia after taking sertraline and a friend’s “study drug,” which he reports may have been MDMA. His temperature is 102.6°F. Which finding would best distinguish serotonin syndrome from neuroleptic malignant syndrome (NMS)?