By Dr. William Walden
There are many causes of dry mouth, but the most common cause is medications. Dry mouth is the main side effect of many prescription and nonprescription medications, including drugs used to treat depression, anxiety, pain, allergies and colds (antihistamines and decongestants), obesity, acne, epilepsy, hypertension (diuretics), diarrhea, nausea, psychotic disorders, urinary incontinence, asthma (certain bronchodilators), and Parkinson's disease. Dry mouth can also be a side effect of muscle relaxants and sedatives. As well as many diseases themselves cause dry mouth, such as, Sjögren's syndrome, salivary gland diseases, sleep apnea, HIV/AIDS, Alzheimer's disease, diabetes, anemia, cystic fibrosis, rheumatoid arthritis, hypertension, Parkinson's disease, stroke, and mumps. Eating disorders such as bulimia and anorexia can also lead to dry mouth.
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