Healthy for The Digestive Tract

I am wondering if anyone knows of foods, herbs and or supplements that strengthen and regulate digestion; specifically the colon. I'm suffering from acute IBS and as a result I am on 8 medications three of which are very strong painkillers(fentanyl/T3/voltaren=finally a non-narc pain med that is helping).

I will probably have to take the anti-spasmodic and 2 of the other 8 for the rest of my life ; but I would really like to remove (most urgently the narcs) the pain meds entirely; as they leave me practically disabled(and I just got offered a job next week installing internet and fixing/maintaining for a owner of a large rental unit = need to be awake!)


thanks!