I had a problem with yeast infections while taking antibiotics all winter for chronic sinus infections...My Dr. told me to take over the counter acidophilis pills every day to help with intestinal health. (if your Dr. says there is no such thing as intestinal yeast infections, how does he/she explain how we get loose stools when we take antibiotics! It's the increase in yeast in the intestines! I found it at walmart and it cost about $5.00 for a 30 day supply. It seemed to work. It's worth a try!