bladder infection
"This medicine was effective in curing a UTI during pregnancy but it was also effective as causing upset stomach and vomiting. I am allergic to penicillin and had no allergic reactions to Keflex but it did cause me to feel very ill by the second pill of the day.  I took this medicine 3x a day for 8 days and by the second day, I knew we would have stomach issues. I took plenty of probiotics but it's just a very powerful medicine."