The best place to check out side effects is the Remicade website. They list everything there. http://www.remicade.com/remicade/global/index.html
I'm schedule for my third infusion next week, and so far no side effects. Knock on wood. I've seen a big improvement, but I still have a lot more symptoms than I would like. I just keep reminding myself that it's medicine, not a magic potion, and that I have to allow myself time to heal.
As for the weight issue, Pred causes weight gain. And as far as I know, Remicade use has only resulted in weight gain in one study. Not to say that it can't happen, but one study isn't much to go on.