I’ve been on and off this med for a few years now. It does work. The main side effect was constipation, but I had another med handy that helped with that.
However, I recently vomited profusely, had diarrhea and abdominal cramps and I think it was because of this drug. I took a break and was fine, but when I re-started it happened again. If you can get your insurance to cover it, it’s worth a shot though.