Does Metoprolol er succinate 25mg by Watson contain gluten? I started taking this med and progressively have gotten worse with a leaky gut. I have now been off this med since tues. It is now Sat and I am no better. I called the pharmacist and they did not know but did tell me about 5% of people on this med can get diarrhea. I work thru the week and it is hard for me to be able to contact the manufacturer as they are not open on the weekends. Any help would be greatly appreciated.