My first thought is that if adderall facilitates learning by helping a student focus then in no way is that cheating. The thought of cheating and expansion of the definition has over the years become more and more broad and many things have been added to it. So much so that if we keep being so worried about it I wouldn't be surprised to study groups before exams to start to become seen as cheating.
More disturbing is that Universities are driving students to want to use help for focusing more in class. University is a place that is supposed to facilitate a higher order of thinking not just regurgitating facts, but being able to analyze situations and uncover the facts. University has become a glorified High school. Students go and are expected to take in this vast amount of information. With needing to know all this information students are forced to memorize it and to be able to focus on all of a students classes along with life it is no wonder they are looking toward these avenues. I have to say yes I have had one or two classes that have helped me look at the world with a more open mind and help give me the ways to analyze situations as a person whom has been through university but these are far and few between. This makes getting a degree just truly a piece of paper. If I were an employer I would want someone with very good analytic skills over someone just with a degree and a bunch of useless memorized facts.
So overall I personally see that adderall is not cheating but a way of helping focus and get in more of the information that needs to be memorized for some test. Where the problem is for the university is in the way classes are structured. As always I welcome all comments and appreciate hearing all sides. Thanks and have a wonderful week. Namaste :)