All broad-spectrum Antibiotics , usually after 2-3 rounds, will cause yeast overgrowth. The yeast overgrowth isn't just in your mouth, it's all thru your body, mostly intestines. You have to cleanse it out, eat carefully to starve the yeasts and not produce any more, and take probiotics. Anti-fungals are somewhat helpful but not the entire cure. Please read the Candida Notes and all the posts on cleansing the bowels, liver, and diet, in the fAQ for this page. Good luck!