It can negatively affect a patient's quality of life-impacting on eating habits, nutritional health, speech, taste, tolerance to dental prosthesis (such as dentures) and can increase the likelihood of dental decay.
Dry Mouth can result from a number of causes, such as the use of certain drugs (such as anti-hypertensives, tricyclic anti-depressants, analgesics, tranquilizers, diuretics and anti-histamines); inflammatory conditions such as Mumps, TB, Sarcoidosis and Sjögren's Syndrome; obstructions such as salivary stones; conditions such as dehydration, diabetes, cardiac and renal failure, toxic goitre, menopause and senility; nutritional causes such as Vitamin A and iron deficiency; cancer treatment such as chemotherapy and radiotherapy; and psychiatric causes.
Spray a water and glycerine solution into your mouth, mixed in a small aerosol bottle.
Always take water or non-alcoholic drinks with meals.
Avoid anything that worsens the dryness, such as certain drugs (see above), alcohol, smoking, caffeine and mouth-breathing.
Protect against dental decay by using a Fluoride mouth rinses / gels (such as Fluorigard), regular dental checks, avoiding sugary foods / drinks and sticky food.
Protect against Thrush & Halitosis by your mouth very clean and moist, rinsing twice daily with chlorhexidine (Corsodyl, Chlorhex or Eludril) or Triclosan (Plax), brushing or scraping of tongue, keeping dentures out at night and soaked in hypochlorite (eg Miltons or Dentural) and use of anti-fungals (if prescribed by your clinician).
Protect the lips with a lip salve or petroleum jelly (eg Vaseline).
Consider a humidifier in the room.
You can also make dietary changes to help the condition - blended and mixed foods are easier to swallow.
Eat hard cheeses instead of soft cheeses and use sucralose in place of sugar. Avoid spicy, hard crunchy or dry foods. Take small bites and eat slowly. Pineapple has an enzyme that helps clean the mouth.
Drugs such as pilocarpine or cevimeline are sometimes prescribed but these drugs have many side effects that many people can not tolerate.
(Adapted from the Eastman Dental Institute, Oral Medicine Clinic - Dry Mouth - 10 steps towards managing a dry mouth. My thanks to Prof Scully for updating me regarding this).