serotonin syndrome (thing)

Symptoms associated with serotonin syndrome include:

• Confusion (in 58% of people diagnosed)
• Agitation (34%)
• Hypomania (21%)
• Anxiety (15%)
• Coma (29%)
• Sinus tachycardia (36%)
• Hypertension (35%)
• Hypotension (15%)
• Nausea (23%)
• Diarrhea (8%)
• Abdominal pain (4%)
• Salivation (2%)
• Myoclonus (58%)
• Hyperreflexia (52%)
• Muscle rigidity (51%)
• Restlessness (48%)
• Tremor (43%)
• Ataxia/incoordination (40%)
• Shivering (26%)
• Nystagmus (15%)
• Seizures (12%)
• Diaphoresis (45%)
• Unreactive pupils (20%)
• Tachypnea (26%)
• Hyperpyrexia (45%)

References:
Sternbach H. The serotonin syndrome. Am J Psychiatry 1991;148:705-13.
Mills KC. Serotonin syndrome. Am Fam Physician 1995;52:1475-82.