Other Causes of dry mouth:
o HIV/AIDS
o Medications (e.g. Medicines for high blood pressure or depression)
o Chemotherapy
o Hypothyroidism
o Radiation Therapy
o Sarcoidosis:
A chronic disease of unknown cause that is characterized by the formation of nodules resembling true tubercles especially in the lymph nodes, lungs, bones, and skin.
o Sjogren's Syndrome (Sicca syndrome):
A chronic autoimmune disease in which white blood cells attack the moisture-producing glands. The hallmark symptoms are dry eyes and dry mouth, but it is a systemic disease, affecting many organs and may cause fatigue.