My 12 year old son takes 1mg Guanfacine 2x/day, 3.75mg Abilify 1x/day & 25mg Sertraline 1x/day. He has gained a lot of weight and his chest looks like a 12/13 yr old girl. He was very thin from birth until he started taking Guanfacine for ADHD. He has a big appetite and is lazy. Can you recommend something other than Guanfacine with similar results to his behavior without weight gain?