Hi Nikki, I have narrowing in the terminal ileum also, and I'm also on Entocort and Pentasa (called Salofalk here in Greece). I have been on Entocort for two months, and although it helps me, I still have my bad diarrhea days, the difference is that it's not everyday. Entocort takes 2-4 weeks to fully work. Prednisolone is much more effective, but also has much more side-effects. Keep in mind, that you also have to watch your diet, otherwise the medicines alone won't do the trick.
Avoid seeds, rough fiber, raw vegetables and raw fruits. These foods always cause me diarrhea, no matter what medication I take.
Oh! and try to avoid stress. Stress always sends me to the bathroom right away!!!