Tacrolimus is the generic version of the topical drug Protopic, which is used  to treat eczema (a skin condition that causes redness, dryness, and itchiness). The prescription medicine is in a class of drugs known as topical calcineurin inhibitors.
Merge this question into. Split and merge into it. Answer by Briesmom. Confidence votes 9. It is impossible to taste substances with a dry tongue because when the tongue is wet, the wetness releases the action of tasting.the tongue has to be wet so that the afferent fibers from the taste buds can send the chemical compounds to the brain to be identified.erge this question into. Split and merge into it. Answer by Briesmom. Confidence votes 9. It is impossible to taste substances with a dry tongue because when the tongue is wet, the wetness releases the action of tasting.
If you have a white tongue due to dry mouth, you can usually resolve this condition by drinking more water, using a humidifier, or rinsing with special mouthwash. You can also chew sugar-free gum or suck on sugarless lozenges to stimulate saliva production. You should avoid smoking and reduce your alcohol consumption.n addition to making your mouth more vulnerable to disease, xerostomia can cause your tongue to turn white. When your mouth becomes too dry, the papillae on your tongue can become inflamed, collecting debris without enough spit to rinse it away. Approximately ten percent of Americans suffer from dry mouth.