In the past I had food poisoning and it took me a while to recover normal bowel function. A short course of antibiotics may be in order, so I would consult someone with actual J Pouch expertise about it. As mentioned by prior posters, taking lots of fluids is very, very important both to stay hydrated and flush the toxins out of your system. And to plain feel good as dehydration will make you feel like crap. You should be peeing frequently and have a clear urine, and if not take your fluid intake up more than a few notches.