Hi Supermom, my son is on Remicade and MTX, his CD is located at his terminal ileum. He did great during the loading doses of Remicade, all the symptoms were gone. Then when we started the regular doses he couldn't make it past 4 weeks before the symptoms would return. We first upped the dose then tightened the schedule to 6 weeks but he would still flare so we then added MTX. He takes it in pill form, 10 pills every Friday. The GI told us to take it on Friday as some experience flu like symptoms after taking it and that would give him the weekend to recoup. He has been taking it for 12 weeks now and has experienced no side effects, so far. Also he is experiencing no CD symptoms.
I have read that many do better with the injection instead of pill form when it comes to side effects. Jmckinley also has a son that was on the remicade/mtx combo but he had a reaction to the Remicade and I think she is now on just MTX, I think. Maybe she will be by with their experiences.
Also since adding the MTX the GI had us add folic acid too as I think MTX is a folate antagonist, but you can probably read more about that in the wiki forum under methotrexate.