Cyproheptadine
"Ive always been skinny but not to a point where people would point it out or say i need to gain weight. I tried taking this because sometimes ill lose my appetite and i can go days without feeling hungry. I took half a 4mg at night before bed and i couldnt get out! I slept from 10 pm all the way to 1:30 in the afternoon and i was still tired! It makes your bones feel like jelly. It does help you gain weight but when i took it, all the weight just went to my stomach. So now im just forcing myself to eat more and i hit the gym 5 times a week for weight lifting and i look better than when i used this pill to gain weight. If you want to put on healthy weight aka muscle this isnt the pill to try- 16lbs of muscle =1 year to put on."