I had only a little bit of white coating early in
tx, but have always gotten a very sore tongue
, with horribly painful bumps, from the interferon/ribavirin aspect of tx. Try to drink even more water, and carry water with you at all times. My dentist advised using Biotene mouthwash and it helps a LOT. In some stores they also carry Biotene chewing gum, which is great to have with you when you are away from home (but be sure to carry your water bottle too). Good luck!