It’s OK, I won’t complain (yet :P ). The problem was more the time when I take medications. Both Concerta and atomoxetine, I took them at breakfast, let’s say between 7 and 8. Concerta wore off at 18, 19 or 20, it depended on the day, but sometimes I needed more time to do my stuff, until 22, and I felt upset because of that.
Atomoxetine starts fully working after weeks or months. But it works for 24 hours, so I can control when I start and when I stop doing my stuff.
Besides, I didn’t take Concerta during weekends, which was good at that moment, but not always. Being a student has some circumstances. I stopped taking that pill in March, when I started atomoxetine.