I am trying to gain weight and can not do it. I eat all day long and still can not gain weight. I feel sick all the time. Would you please help me to gain weight

Well it actually depends on what type of weight you want to gain; muscle or flab. IF you want muscle the best thing to do is get Whey protein shake. To gain flab when you eat something look at the items with the most fat calories.

As much as know use of anti-psyhotics usually have side effect of getting fat .