^It's ok, much better to bump an old thread than to start a completely new one, also makes it much easier for people searching through threads to get the answer they were looking for.

I'm certainly not a doctor, but I've never heard of marijuana having a bad reaction with other meds being taken. I'm sure its possible, but I just haven't heard about it. I haven't taken Asacol, but I have been taking Pentasa for years which is made by the same manufacturer and have never had any problems with using marijuana with the Pentasa.

I am guessing it is more likely you got either some strong weed you weren't used to, or really crappy quality. How often did you use cannabis before you had this reaction? What type of symptoms did you have? Was it just a bad high or did you have increased symptoms related to idiopathic colitis?