I am currently 43 and started taking sertraline 50 mg on April 7th to help with some anxiety. On May 10th, I started having some chest pain and diaherra. I went to the dr and they thought I was having some issues with heartburn. As of 6/4, I would have had diaherra for almost 4 wks. Stool samples were negative, but they put me on Metronidazol 500 mg 3 times a day for 7 days to see if things improve, they have not, although it is not explosive as it was. Still funky colors. My question is that how can I tell if it is a side effect of the Sertraline or something else. I like the sertraline, and only had a headache for a few days when I took it. I go back to the dr on Thursday, but just wanted to know your thoughts.