I have to take Aderal 20mg a day(time release ritalin) because of my A.D.D. I love it, it not only gives me a little extra something at the gym but I stay so focused..it like I'm on a mission. I can say it kills my appetite but during the day while the Aderal is in full effect I only eat because I know I have too, not because I'm hungry. I always have 2 100g protien shakes in my office at work to sip off of throughout the day in between meals(2). But at around 5-6pm it wares off and I chow down at night(3 meals) and a 60g shake before bed if I'm not stuffed, if I am I'll slam it when I wake up in the middle of the night to take a leak.
I had to take ritalin when I was a lot younger(13) but I couldn't stand that shit....way too dramatic. With Aderal you really never know its kicked in or your on it other than you are more focused and for me I don't stumble over words or lose my train of thought but w/R that shit was like doing a bump of crystal.. and following a jolt of energy always comes a CRASH....thats how it effected me, but we're all different.
Thats my 2 cents, good luck bro