"i have only been on ritalin for a couple days now and the results are great. my concentration and focus has improved, i can get more things done and i feel more motivated and self assured. my social life is better and can keep a conversation going. the downsides for me where fast heart rate which made me feel anxious, a bad headache when i first took it and a decreased in appetite. overall this is working for me so far and i would say to not abuse this drug, combine it with alcohol or anything else and to eat well before taking medicine. hope this helps"