Parkinsonism is a group of neurological disorders characterized by hypokinesia, tremor and muscular rigidity. Its most common form (Parkinsonís disease) is paralysis agitans, usually occurring in late life. There is degeneration within the nuclear masses of the extrapyramidal system and a characteristic reduction in dopamine levels. It is a slowly progressive disease characterized by mask like facies, a tremor of resting muscles, a slowing of voluntary movements, a festinating gait and peculiar posture. There may be excessive sweating and heat sensations. Although the disease cannot be cured, there are various agents which can relieve its symptoms, the most common of which are levodopa and anticholinergic drugs.