Postural induced-tremor in psychiatry.

Postural tremor is the most common movement disorder in psychiatry, and often a difficult problem for clinicians. It can be classified as physiological, essential, drug-induced, and postural tremor in Parkinson's disease. Drugs used in psychiatry that can produce postural tremor, include lithium, valproic acid, lamotrigine, antidepressants, and neuroleptics. Clinical characteristics of postural tremor induced by each of these drugs are described. Pharmacological strategies for therapy in disabling drug-induced tremor include beta-blockers, primidone, gabapentin, topiramate, and benzodiazepines; their utility, doses and side-effects are also discussed.