My psychiatrist started with concerta 18mg and I used it for a month. I don't know if it was because it was my first month of using adhd meds but it sucked. I was feeling empty all the time and couldn't get anything done. Then I started taking ritalin and the first time I took it, I felt way too energetic and like I could do anything. And now, I've been using ritalin for a little more than a month. It makes me feel better. For example, I was feeling like shit when I woke up today and after taking Ritalin, I was more motivated and had the energy to do a lot of things. But I still don't think it's enough because I still can't focus while studying. Is there anything else I can do for it?