I tried searching for a past post on this and could not find one even though I am sure there was. I am having nasty cramping, nausea and am not eating solids. I had stopped Pentasa as my new Gi said it wasn't working on the area where I show most symptom (butt). However, the cramping is happening further up---surgery site and upper abdomen. I have a ton of Pentasa still and was going to take it. Have doc appointment next week and was wondering if this might kick in before then. Had been on it so long, I can't rem how long it took to show signs of improvement.