I have not posted for about 5 months because since June ive been doing GREAT! Ever since Ive been taking Caltrate. Anyways last week I got a cold, sinus infection and they gave me 875MG tablets of Amoxicillin. Since then my tummy has been kinda upset, growling, and passing more gas. Tonight I had a BM that was kinda softer than it has been the last six months.Ive been reading the side effects of Amoxicillin and it says upset stomach, loose bowels are common.Just wondering should I be freaking out right now, or is it likely the medication causing it?