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Mental status changes:
Agitation (3)
Anxiety (4)
Coma (3)
Confusion (1)
Hypomania (3)

Cardiovascular:
Hypertension (3)
Hypotension (4)
Sinus tachycardia (3)

Gastrointestinal:
Abdominal pain (5)
Diarrhea (5)
Nausea (3)
Salivation (5)

Motor Abnormalities:
Ataxia/incoordination (2)
Hyperreflexia (1)
Muscle rigidity (1)
Myoclonus (1)
Nystagmus (4)
Restlessness (2)
Seizures (4)
Shivering (3)
Tremor (2)

Other:
Diaphoresis (2)
Hyperpyrexia (2)
Tachypnea (3)
Unreactive pupils (3)

% of people reporting:
1: >50%
2: >40%
3: >20%
4: >10%
5: <10%


References:
Mills KC. (1995) Am. Fam. Physician. 52: 1475-82. "Serotonin syndrome."

Sternbach H. (1991) Am. J. Psychiatry. 148: 705-13. "The serotonin syndrome."

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