Chlorhexidine cured my white coated tongue. My doctor prescribed Chlorhexidine 10% mixed with water as a mouthwash. Many people says that white coated tongue is only candida. But I don't belive in that. I believe that it includes bacteria as well. So chlorhexidine kills all of them. It's extremely powerful and hurts the tongue. But you can already feel the difference in the day after. I tried EVERYTHING you can imagine, and belive me, glycerin will help just for 1 day, honey just for 1 day, and so. It's not solving anything. What will solve it is killing this pathogens. What helped: chlorhexidine, low carb diet, cultured vegetables (book: body ecology diet), brushing the tongue after EVERY meal, so the sugar does not stay much longer in the tongue offering food to pathogens.