Bad taste in mouth, yellow coating on tongue, lansoprazole didn't work. what can i do?

Discontinue: Lansoprazole can cause your mouth to become dry. When that occurs then the balance of bacteria and other organisms in your mouth can become unbalanced. For example, a bloom of yeast could occur which could explain the yellow coating on the tongue and the bad taste. Consult your doctor before discontinuing the lansoprazole. Antifungal medicine could be prescribed.

Clean Tongue: Use a soft tooth brush and/or a tongue scraper to clean you tongue.