"Common infections that are treated with Cephalexin include infections of the urinary tract. It is important to note that Keflex may cause false results in tests for sugar in the urine, diarrhea, nausea, abdominal pain, vomiting, or diarrhea in about one-third of patients. Keflex is effective antibiotic therapy for skin and wound infections and it can be used on dogs and cats and almost everyone either has old antibiotics in their medicine cabinet or knows people that do."