Why so? Why cannot drug companies overcome that. Haloperidol did not do that, but had other side effects. Newer ones beat haloperidol on some neurological side effects, but introduce weight gain to "swap". Geodon that basically does not do it, and that I am on, is considered less effective by many doctors, and probably is. Zyprexa, which is extremely effective, causes massive weight gain in many patients. Why is this a price to pay?