Moremi~ Seroquel should be a taper off med. Not a good one to just stop cold turkey.

Voice your concerns about the weight gain to your Pdoc ,, There ARE some weight neutral meds out there.. I wish i hadnt let my weight gain go up to 40 lbs before I put my foot down. I know take Haldol and i have lost a few lbs. Im no longer hungry 24/7, I refused to become diabetic from weight gain just to treat Bipolar !
Be your own Advocate

Good Luck