no i don't..(I was reaattached but had problems in that same area, and have the illeostomy now) and often wondered what the correct med would have been, as you cannot dilate empty space. The idea of filling the space to inflate the bowel might be accomplished by metamucil but with the additional strain on the healing area, so stool softeners etc. all the logical physical approaches. If you seek a medication that dilates, dilate what? the area to dilate is empty. hence the physical balloon approach.
You can dilate the blood vessels on the bowel wall but in theory, this will decrease the space in the opening, so this approach might do the opposite of what is intended, yet it is used for fissures in order to decrease the pressure and increase blood flow to aid in healing and relax contraction. such a med is isosorbide dinitrate. see also http://en.wikipedia.org/wiki/Vasodilation but this of course applies to the blood vessel not the bowel as a vessel.