Let's face it, persistent dry mouth isn't ranked on the list of medical conditions that are considered severe illnesses, but if you have ever woken up in the morning with a sore throat, numbness on your tongue and cottonmouth, you know how uncomfortable it can be. Dry mouth also known as xerostomia in medical terms results from an inadequate production saliva. While it is not a disease, dry mouth is a common symptom of a medical disorder or a side effect that occurs from medications, such as antihistamines, decongestants, pain killers, diuretics, and many others. Saliva plays a critical role...