I've been thinking of getting back on meds to help concentrate more since I plan to take a Comptia certs course and exam. I've been doing somethings to improve my focus without meds but I really want to get my act together and actually do something with my life. I used to take Concerta when I was in middle and high school and it did improve my focus in class. The only major downside I faced was loss of appetite. Since I've been off meds, I've heard of people taking Adderall which piqued my interest but I don't how it differs from Concerta. What do you guys think? Thanks in advance.