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.
Examples of items allowed on a clear liquid diet include: 1  Broth. 2  Fruit juices without pulp, such as apple juice. 3  Ice chips.  Ice pops without bits of fruit or fruit 1  pulp. Gelatin. 2  Water. Tea or coffee without  cream.