| Anticholinergic syndrome | Use of tricyclic antidepressants or other anticholinergic drugs | Tachycardia, tachypnea, hyperthermia (usually 102.2°F [39°C] or below) | Dry mouth, blurred vision, mydriasis, flushed skin, agitation/delirium, decreased bowel sounds |
| Malignant hyperthermia | Administration of halogenated inhalational anesthetics or depolarizing muscle relaxants | Hypertension, tachycardia, tachypnea, hyperthermia (up to 114.8°F [46°C]) | Diaphoresis, mottled skin, agitation, decreased bowel sounds, muscular rigidity, hyporeflexia |
| Neuroleptic malignant syndrome | Ingestion of antipsychotic medications | Hypertension, tachycardia, tachypnea, hyperthermia (above 105.8°F [41°C]) | Sialorrhea, diaphoresis, pallor, stupor, mutism, coma, normal or decreased bowel sounds, lead-pipe rigidity, bradyreflexia |