I have gained about 8 pounds since I started meds, but I don't know if it's my celexa (which I plan to stick with) or my risperdal (similar to abilify and seroquel) that is causing it. Do anti-paychotics cause weight gain? I've been tired so I haven't been working out as much and I've been eating very healthily. I have never been overweight. I know this is just vanity but if the risperdal is the likely culprit, I might ask to go offf of it since my doctor has said it is only temporary anyways. If it's more likely the celexa, I guess I'm just stuck.