There are many causes of dry mouth. Dry mouth most commonly occurs as a side effect of medications that cause decreased saliva production, including high blood pressure medications, antihistamines, antidepressants, diuretics, nonsteroidal anti-inflammatories, narcotics, and many others.
Liquid diet: The Liquid diet is the restriction of solid food intake, and replacement of solid food with liquids. In hospitals, liquid diets are prescribed by doctors for a number of reasons for patients who are unable to consume solid foods. Liquid diets may be prescribed following surgery or as a preparation for certain medical procedures.
A clear liquid diet consists of transparent liquid foods, and does not contain any solid particulates. This includes vegetable broth, bouillon (excepting any particulate dregs), clear fruit juices, clear fruit ices, clear gelatin desserts, and certain carbonated drinks such as ginger-ale and seltzer water.