From: Serotonin syndrome triggered by postoperative administration of serotonin noradrenaline reuptake inhibitor (SNRI)
Hunter criteria
History of serotonergic agent usage
At least one or more of the followings:
 1. Clonus: spontaneous, inducible, ocular
 2. Agitation
 3. Autonomic dysfunction (i.e., hyperthermia)
 4. Tremor
 5. Hyperreflexia