COMT

Medications for PD fall into three categories. The first category includes drugs that increase the level of dopamine in the brain. The second category of PD drugs affects other neurotransmitters in the body in order to ease some of the symptoms of the disease. The third category of drugs prescribed for PD includes medications that help control the non-motor symptoms of the disease, that is, the symptoms that don't affect movement. The most common drugs for PD are in the first category, dopamine precursors—substances such as levodopa that cross the blood-brain barrier and are then changed into dopamine.  Other drugs ...