Pre- Op Liquid diet

Did anyone else have a problem with this? I am on a high protein liquid diet for 10 days before surgery. I am on day 3 and am experiencing cramping, nausea and diarrhea. This is really hard to deal with at work, I have to keep running to the bathroom. I can deal with this knowing that I have to do it for only a specific period of time, but I am wondering if I am doing something wrong here- could taking metformin be a factor, or the type of protien drinks I am using?

 I don't have an answer to your question. Things worked great for me till surgery, then lactose intolerance set in. You lactose intolerant? That would certainly cause stomach pain, gas and other lovely things.