I've taken most of the drugs you've mentioned. I've been taking trilafon atleast for this year as far as I can remember. It hasnt' caused weight gain in me which I am like thank God because it seemed like everything I was taking was causing weight gain. I've actually changed my eating portions and as a result have lost 25lbs since the beginning of the year although I don't think trilafon causes weight loss. I don't have a problem with nausea; but, I usually eat something small with my pills because others are supposed to have food with, etc. Hope this is helpful. You can try www.webmd.com if u like.