Did they put you on azathioprine or methotrexate in advance of beginning Remicade? This is to prevent anti-Remicade antibodies. It is particularly needed if you had been on Remicade before. The antibodies do not make you have a reaction, but prevent the Remicade from being effective. If they did not test for antibodies, you should probably have this done prior to your next infusion. I have antibody testing every year.
Jan