Has anyone experienced diarrhea while taken cefprozil 500 mg? I started taken it because i have a ear infection but i am worried because reading the little paper that tell you everything about it, it says may cause watery stool and diarrhea and tell your doctor if you are experiencing these symptoms which could be a sign of another infection or cause C. Diff. Colitis, but i been feeling fine just a sinus infection so my doctor gave me cefprozil to help, which it is, but i have been experiencing watery loose stools. last year i had C diff which i have no idea how i got it, but i am worried that maybe its causing me to get it again, Maybe i am over reacting. I am just wondering should i tell my doctor or is it normal and i will get over it in time. I am not in pain or anything just been going to the bathroom a lot. Is their a way to improve my symptoms and not have to go to the doctor?