I'm sorry to hear about your friends problems and I really hope he can get it sorted out soon.

I don't have MS but I do have CRPS (Complex Regional Pain Syndrome), which is also neurological. I have the same problem has your friend and suffer from constipation a lot of the time, I can go days or weeks without going to the toilet!! My nanan also had MS and my mum says that she had the same problem ... oh, the joys of neurological illnesses!!

I haven't found anything that helps me at the moment but I second what Gazelle said and that it might be useful for your friend to pay a trip to the Gastroenterologist.

A lot of the meds that we take can cause constipation so it could be that that is making your friend have difficulties going to the toilet.

I hope whatever it is gets fixed soon has I know it's no fun!! please keep us updated when you can.

Alison