You can drink a ton of water during your waking hours, but it's the nighttime hours that do us in
because we product very little, or no saliva
, which contains enzymes, whose main purpose is to break down sugars, etc that lead to tooth decay.
Listed below is the URL that lists medications that cause dry mouth, as well as a product to help fight this side-effect.
There are numerous medically-documented studies that have been done, as well as are ongoing, regarding this topic.