Keflex Side Effects: I HAVE BEEN ON KEFLEX FOR ABOUT 8 DAYS NOW AND HAVE COME DOWN W/A http://www.medications.com/effect/view/4399 I HAVE BEEN ON KEFLEX FOR ABOUT 8 DAYS NOW AND HAVE COME DOWN W/A YEAST INFECTION...NOT SURE IF IT IS THIS OR THE CLEOCIN I AM TAKING AT THE SAME TIME... I understand yeast infections are typical of women taking antibio Thu, 20 Nov 2008 10:35:35 -0500 http://www.medications.com/effect/view/4399?item=14684 I understand yeast infections are typical of women taking antibiotics. Antibiotics also kill good bacteria...some of those good bacteria keep the yeast in check. Other issues probably occur...intestinal problem can be caused by the good bacteria being ki http://www.medications.com/effect/view/4399?item=14684