Please listen to Grizz. A white tongue can be nothing BUT fungus. Google it "white film on tongue".
I took Antibiotics for years but it did nothing but make the situation worse. If you can get you body to an alkaline level the fungus can't survive. Antibiotics caused the white film to go away on my tongue but I still had the fungus.
Doctors would look at my white filmed tongue and say "Yuck". BUT none of them ever told me what it was. Decades of illness because of the fungus.