[Xerostomia in the elderly: causes, consequences and treatment possibilities of dry mouth].

Xerostomia is in most cases caused by a decrease or discontinuity of salivation (hyposalivation). A physiological decrease in salivary gland function is not the main cause of hyposalivation. According to recent publications the general state of health plays a major role. Probably the most common cause is the use of medication with a salivary secretion inhibitory side effect. Proper patient assessment is essential to reveal the cause and to provide optimal treatment.