One of the major issues facing patients is that of dry mouth. Many of the medications used to manage the Parkinson’s, can cause a marked decrease in saliva production. Saliva is important for a number of reasons. Not only does it lubricate the mouth to assist in swallowing, it’s vital to taste and chewing. The enzymes and antibacterial properties present in saliva help to stop sugar from accumulating on teeth and aid in food digestion.