..just happened to get notification of your question so don't want to interfere as not on it nor been on it, (never heard of it before) but I did just check on Internet and it is listed (diarrhea) as a common side effect, but also says to tell your Doctor if you get this side effect......although I have not taken it I have IBS-D, C.Diff and now fecal incontinence/diarrhea daily and I hope that it does go away for you as it's horrible to live with. I also get it with all antibiotics... and when we are on antibiotics we cannot take anti-diarrhea meds!!! ......so wishing you the best outcome.... J.S.