"i have been taking ritalin for about a month now. it really helps me focus on things. but a downfall is, it is really hard to multi-task. i can only concentrate on one thing at a time, and that makes it very difficult for my school work. also, i have had a huge loss in appetite. i am not hungry, ever. during the month i have been on this medicine i have lost almost twenty pounds due to the fact that i never want to eat."