George and Ron, as the doctor once explained it to me, yogurt works on the intestinal circuit, but not the reproductive circuit. Never reaches there. So while it is important to eat the yogurt while one is taking antibiotics, nonetheless, certain side effects may often occur, bringing discomfort or even distress, and requiring even more medication. It's like having a tiger by the tail. Broad spectrum antibiotics kill off much of the 'good' bacteria, as well as the 'bad' ones. When they discover new medicines that can pinpoint the bad guys, the problem will be resolved. Penny, NY . ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.