Mayo Clinic, Parkinson's Disease, Levodopa versus Hillary's Problem

Carbidopa-levodopa. Levodopa, the most effective Parkinson's disease medication, is a natural chemical that passes into your brain and is converted to dopamine.


Side effects may include nausea or lightheadedness (orthostatic hypotension).


Also, you may experience involuntary movements (dyskinesia) after taking higher doses of levodopa. Your doctor may lessen your dose or adjust the times of your doses to control these effects.