Does citalopram make you gain weight? if so how ?

Celexa (citalopram): It tends to be fairly weight neutral. This means that some people may gain some weight, some may lose weight & some may have no change. It's sister drug; lexapro; is even more weight neutral. Although most of my patients have not gained weight on it, some have had minor weight gain and a couple of patients had a large amount of weight gained.