Parkinsonism
Drug-induced parkinsonism is a subacute syndrome that mimics Parkinson’s disease. Though less alarming than dystonia, it is more common, more difficult to treat and can be the cause of significant disability during maintenance treatment especially in the elderly. Bradykinesia is accompanied by masked facies, reduced arm swing, slowed initiation of activities, soft speech and flexed posture. 32 Bilateral and symmetrical rigidity of neck, trunk and extremities appears with cog-wheeling. Resting or action tremors are also observed symmetrically and can be generalized or take the form of a focal peri-oral tremor (rabbit syndrome). Patients may also experience sialorrhea, and postural or gait disturbances.
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