I am 42 with ADD. I was on Ritalin a few years ago then stopped. When I started again I had really bad headaches taking it. (also headaches without it). I also tried Adderall and Metadate. Now that I have my headaches under control the pdoc said that I could try again. I can choose which ever one I want and we are going to see which one feels better for me. I have really only taken Ritalin for any length of time. Not sure about Adderall and Metadate. I hate the side effects of sleeplessness and weight loss. Do these differ any?
Metadate has the same active ingredient as Ritalin. If you didn't feel well on it, chances are you aren't going to feel well with Metadate, either. Granted, Metadate is sustained release as opposed to immediate release.
Give Adderall a try. There are various strengths, and 2 different formulations.