What are the most common causes of dry mouth? Dry mouth, also known as xerostomia, occurs when there is a decreased flow of saliva in the mouth. Saliva plays a crucial role in maintaining oral health by lubricating the mouth, aiding in digestion, and preventing tooth decay. There can be various causes of dry mouth, including: 1. Medications: A wide range of prescription and over-the-counter medications can cause dry mouth as a side effect. These include antihistamines, decongestants, antidepressants, antihypertensive drugs, and more. 2. Medical Conditions: Certain medical conditions can lead to dry mouth. These include autoimmune diseases like Sjögren's syndrome, diabetes, HIV/AIDS, Parkinson's disease, and stroke. 3. Dehydration: Not drinking enough water or experiencing excessive sweating can lead to dehydration, which in turn can cau...
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