Treatment Guidelines from The Medical Letter
				
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ISSUE 22
    
   			
      			
      		
            		
			ISSUE 22
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				Drugs for Parkinson's Disease
June 1, 2004 (Issue: 22)
				Parkinson's disease is caused by progressive degeneration of dopamine-containing neurons in the substantia nigra. Dopamine itself cannot be used to treat Parkinson's disease because it does not cross the blood-brain barrier.
        			
        			
				
				
        			
				The Medical Letter is a subscriber-funded nonprofit organization that publishes critical appraisals of new prescription drugs and comparative reviews of drugs for common diseases.
				