I am on Risperdal (for 9 years) and Zyprexa (for 5 years). I have gained a lot of weight since the Zyprexa was added. I am beginning to worry but I cannot live with the symptoms if they returned, they would ruin my life. Double-edged sword here my friends. I will talk with my pdoc, maybe I can wean off of the Risperdal.....I believe the Zyprexa is more effective against my symptoms, but I can't be sure.