And a statistic to remember is only 65% respond to remicade, so it doesn't work universally work for everyone. Too early to call remicade a failure, but it's important to remain pragmatic and move on should it come to it.
Another tool at your disposal is a blood test to measure his minimum remicade/infliximab concentration and antibody levels. It's a dosing guide, to tell if he has his optimum levels of remicade/infliximab needed to heal. These tests aren't essential (a doctor can try an experimental higher dose without this test), but are a good helper when you're not sure what's going on and need some data to backup your decision. Prometheus Labs in Ca invented the test and still charges a premium for it, they call it Anser IFX
/www.anserifx.com. You can also get this test as a generic from LabCorps and a variety of other labs:
/www.labcorp.com/test-menu/29496/infliximab-concentration-and-anti-infliximab-antibody