Do all the meds used to treat RA have the side effect of weight gain?

I know it's worth the price of being pain free ....I was just wondering.

And I realize the anti-inflammatories don't, however, they also don't do anything for me !!!

I think prednisone is the only one that will. I like to save it until I absolutely am in a flare that goes for more than couple days. I do know that many people with RA tend to gain weight, not from the drugs, but from not being able to be physically active like they once were.