DR RV ANAND SENIOR NEUROLOGIST SAI NEURO CLINIC CHENNAI PARKINSON DISEASE TREATMENT parkinson disease is caused by deficiency of a neurotransmitter called dopamine.this transmitter is produced from a brain structure called basal ganglia.in these patients dopamine producing cells either die or reduced in number. the treatment is by giving back the dopamine. the drug of choice is LEVODOPA.it gets converted to dopamine in the brain. there are drugs which activate dopamine receptors in the brain.