I'm sorry your spouse is going through all this. New j-pouches take time to adjust - not what you want to hear, but know things will get better. Some suggestions to help as you adjust: 1) Try to add some thickening things (soluble fiber) to his diet. Examples: oatmeal, peanut butter, potatoes. 2) Begin using a fiber supplement like psyllium husks or Benefiber. It seems counter-intuitive, but it really helps to thicken up the stools. Add them slowly or you may have a rough time with too much gas. (I take a Beano when I use psyllium.) 3) Ask your Doctor for a prescription for Lomotil. It is stronger than Imodium and personally helps me better. 4) Be careful with too much ibuprofen. It can cause liver problems and I don't want that for you! 5) Remember you haven't had your take down very long and its going to take a few months for it to adjust. Don't give up!
Hope this helps a little.