I am a long time Ritalin user. I'm not really sure how much of a help it is but it helps more than any of the others I tried. I take 25 mg. 30 mg helped a little more but my B/P didn't like it at all! I have a weird body sleep/awake pattern. I think it's called cicadia or something like that! It doesn't matter how much sleep I get or what time of the day I get I really don't feel really good and peppy until about 7 PM!!!! So I usually don't go to bed until about midnight or so. If I sleep really late 2 PM is my cut off time to take the Ritalin. Because I don't really feel it until the evening I tried taking it in the evening a couple of times and that was a big mistake. No sleep at all. I wish it had that effect in the morning! And I still have days that no matter what I do I feel just down right lousy but I know that I will feel better in the evening. Psycological maybe? I don't know.Good luck with whatever you take.