The combination of chewing and acidic taste, as provided by chewing gums or solid food or fruits, preferentially acidic (apple, pinneapple, carrots etc.) can be very effective in stimulating saliv flow for patients who have remaining salivary function. Patients with dry mouth must be told not to use sweets, sweetener in food and drink and various other sugar products due to the increased risk for dental caries.Acidic soft drinks are an increasing source of dental erosion as is excessive intake of white wine