Finally, on February 20, 1792, President Washington formally created the U.S. Postal Service with the signing of the Postal Service Act, which outlined in detail Congressional power to establish official mail routes.
The two concerns are firstly that Haldol (like all other antipsychotics) can cause tardive dyskinesia and as that is clinically related to Parkinson's this is an express concern with people with Parkinson's.
You may need to take several medicines to get the best results. Levodopa (also called L-dopa) is the best drug for controlling symptoms of Parkinson's. But it can cause problems if you use it for a long time or at a high dose. So doctors sometimes use other medicines to treat people in the early stages of the disease.