I know this is an old post but I was just doing some research on how long it took for the Remicade to kick in for different people. I guess I still have some hope after reading this thread. I have had two infusions already with minimal improvement. Im hoping my third (today) is the one. My urgency and frequency has been going up lately and im just hoping this might do the trick :) I guess we'll see! Hope everyone is having more luck than me with this stuff, take care all.