Hi. I'm having a terrible time with metformin. I have suffered on and off now for 2 years with foul sulfur burps and diarrhea with sickness. Always starts during the night. I have been seen by gastroenterology and he seems to think it's either metformin or IBS. I'm due to have a double endoscopy and colonoscopy just to rule out crohns but he's pretty sure it's medication. I've now changed to 7mg rybelsus, 40mg of glipizide, and 5 mg of alogliptin a day. Has anyone else suffered this? I'm really struggling. I'm having to have time off work and cannot enjoy things anymore.