I am 28 years old Indian male, having a white coating tongue since 5-6 months, when I wake up from bed dry saliva from my mouth comes after that I wash my mouth.. it disappear.. but after few minutes it again comes. I don't have any sore on the tongue therefore I consult with a dentist in my home town agartala... after observation he prescribed me eldervit tablet... but no fruitful result come. What I have to do...