Ever since I took Levaquin in December for about eight days, my mouth has been extremely dry, my saliva is white foamy and my taste buds are very sensitive. It somewhat subsided after a couple of months. Then I recently got sick again, was given a different type of strong antibiotic and the foaming, the excessively dry mouth, damage taste buds have all return back. I am a 10 year stage ll thyroid cancer survivor. What could be causing all of this?