Some are available by prescription only; others can be bought over-the-counter. FDA has also approved several prescription drugs to relieve dry mouth caused by certain medical treatments or conditions, such as Sjoegren'sjÃ¶gren s syndrome and radiation for head or neck. cancer
Parkinson's disease (or, simply, Parkinson's or PD) is the most common form of parkinsonism, a group of motor system disorders. It is a slowly progressing, degenerative disease that is usually associated with the following symptoms, all of which result from the loss of dopamine-producing brain cells: Tremor or trembling of the arms, jaw, legs, and face.
As these nerve cells break down, dopamine levels drop and brain signals that direct movement become abnormal. Symptoms of Parkinson's disease appear when these dopamine-producing nerve cells become damaged or die. Parkinson's disease typically begins relatively late in life, around age 60 on average, and progresses slowly over time.