I am curious as to why you’re taking both methylphenidate and an amphetamine. To my knowledge, people do better with either one or the other, but not both. I think that I am possibly one of the people who do well on a dose that is higher than the dose range the FDA studied; it is possible. I read this on an AdditudeMag Article called “Patient’s Primer on ADHD medication”. If you find it, it may answer a lot of your questions. Good luck.