It's been a few years for me, but if I remember... I didn't have any side effects and started noticing a little difference by the 3-4 day. but, it was the third infusion before I really felt better and it took a while longer to heal. Enjoy the less pain part! Every little step counts!
--39 year old female, dx as UC in '04 (1st symptoms in '03), switched to Crohn's in '05, 1 fistula, crohn's colitis, limited to large intestine
--rejected (reaction/didn't work): Asacol, AZA, 6-MP, MTX, Remicade, Humira, prednisone
--stuck on methylprednisolone, tried Prochymal in Phase III study (can't wait til it's approved!)
--started Tysabri 3/21/08
--single mom to 10-year-old girl