What has been the long term side effects of taking ADD and ADHD Drugs?

I was in middle school when i began taking cylert and ritalin. It was a new drug and a new thing. I was one of the first if not the first student in my school. With this new special drug combo. So now i am 40. Middle school was many years ago and what have if any been the long term effect from the drugs. I used them well into college and a few time afterwards in my adult life. Then i enjoyed taking the pills. But i really didnt think about any dangers from long term exposure or build up or side affects. I now question whether it was right to take these pills to alter me to fit into a mold which i didnt fit. What was causing my so called hyper-ness and distractions. Why is the drug the answer and now after these drugs have been used for over 30 years we see that some are being pulled of the market. Cylert was banned in Canada and Europe long before it was in the USA, why, what's been foundout, I home to get peoples comments on what happened to you, how long did you take the drugs. and what drugs? and what times? what doses and what if any side affect. Did you have weight loss over time? tell me what you found out and what you experienced. I would lke to document this and i could not find much on it on the web.