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.
Various types of hospital diets are soft diet, full liquid diet, clear liquid diet and solid diet. Clear liquid diet is given immediately after surgery. Full fluid diet comprises of viscous fluids, in the form of juices, white soups and so on. Soft diet is given after four or five days of surgery or infection.