Tremor

Enhanced physiologic tremor, eg, anxiety
Essential (familial) tremor
Parkinson's disease
Hyperthyroidism
Hepatic encephalopathy
Cerebellar tremor, eg, multiple sclerosis
Adult-onset idiopathic dystonia
Wilson's disease
Drugs: caffeine, alcohol withdrawal, sympathomimetics, antipsychotics, theophylline, metoclopramide, lithium, levothyroxine, tricyclic antidepressants, valproic acid, reserpine
Psychogenic tremor