Dry mouth is a condition in which the salivary glands in mouth do not produce enough saliva to keep the mouth wet. It is also called xerostomia. It leads to difficulty to speaking, eating, and digesting food, which can lead to malnutrition. Extreme dry mouth may impair quality of life as it may cause anxiety and permanent mouth and throat disorders. Dry mouth affects about 10% of the population and is more prevalent in women than in men. Dry mouth may occur as a side-effect of medication, including high blood pressure medications, antidepressants, diuretics, non-steroidal anti-inflammatory drugs, hypnotics, and others, causing in saliva production. Conditions affecting salivary glands, such as diabetes and HIV, may also lead to dry mouth. Furthermore, radiation therapy and chemotherapy used to treat cancer may cause dry mouth. Additionally, nerve damage in head or neck, dehydration, and menopause in women may cause dry mouth.