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.
(erdin hasdemir/iStock/Getty Images) A clear liquid diet is made up of liquids and foods that turn to liquid at room temperature. A liquid is considered clear if when you hold it up to the light, you can see through it. Apple juice, for example, is a clear liquid, while milk is not.