Hi,
My son has been on Remicade for almost 2 years now. When he couldn't last the 8 weeks between infusions they first tried shortening the time in between. Eventually they ended up doubling the dosage and giving him infusions every 6 weeks. That combination seems to be working for him. The nurse at the GI's office told me it is very common to have to adjust the dosage and/or time between infusions. It's just a matter of figuring out what will work for each individual patient. I wouldn't panic yet.
Take care,
Nancy (son Ben, 15, CD dx 3/06; Remicade, probiotic, multi-vitamin)