PT - JOURNAL ARTICLE AU - Saeed A. Bohlega AU - Nurah B. Al-Foghom TI - Drug-induced Parkinson's disease. A clinical review DP - 2013 Jul 01 TA - Neurosciences Journal PG - 215--221 VI - 18 IP - 3 4099 - http://nsj.org.sa/content/18/3/215.short 4100 - http://nsj.org.sa/content/18/3/215.full SO - Neurosciences (Riyadh)2013 Jul 01; 18 AB - Drug-induced Parkinsonism must always be suspected when parkinsonian symptom like rigidity, tremor, or postural instability appear in patients receiving drug treatment. Indeed, drug-induced Parkinsonism is a frequent etiology of secondary Parkinsonism. The main causative drugs are antipsychotic, other neuroleptic drugs, and calcium-channel entry blockers. The risk associated with antipsychotics is often dose dependent and related to dopamine D2 striatal occupancy. The risk is less for the second-generation atypical antipsychotic. The other treatments rarely involved are antidepressants, antivirals, anti-arrhythmics, lithium, valproic acid, and others. Regression of symptom will be observed in most cases after a mean delay of 3 months after cessation of treatment. In one-tenth of cases, symptoms persist after drug withdrawal leading to the diagnosis of underlined idiopathic Parkinson's disease.