Cephalexin and Diarrhea
Cephalexin (Keflex®, Biocef®) is an antibiotic often prescribed for the treatment of various types of bacterial infections. It is also licensed to prevent heart valve infections. A number of side effects have been reported with this medicine; diarrhea appears to be one of the most commonly reported problems with cephalexin.
It is important to know that not everyone who takes cephalexin will experience problems. In fact, most people tolerate the drug quite well. If side effects do occur, in most cases, they are minor, meaning they either require no treatment or can easily be treated by you or your healthcare provider. If you are taking this medication and diarrhea occurs (and becomes severe or is watery), be sure to notify your healthcare provider immediately, as it could indicate a potentially serious complication.
(Click Cephalexin Side Effects for a more complete list of side effects that may occur with cephalexin, including other potentially serious problems that require immediate medical attention.)