For five years i've maintained a 100 lb. weight loss. they recently changed my psyhc. meds and i'm ballooning. is it the celexa (citalopram) or the trazadone?

More likely Celexa (citalopram): Both trazadone ; Celexa (citalopram) can cause weight gain in some people; both are also known to cause weight loss. However, it appears that more people gain weight on celexa- many websites say studies have shown an average weight gain of 15-20 pounds on Celexa (citalopram) (though I have not seen the actual studies). Consider alternatives including 5-htp ; same. Michael schachter is an excellent holistic md in suffern.

Neither is known : For this. You will have to ask your psychiatrist to stop them one at a time to figure out which one it is. Best wishes.