Certainly possible, but I’m sort of a textbook mild case of ADHD, just with the side case of insomnia from being fairly prominent (which was true even before medication). Everybody reacts to medication in different ways, so I’ve just found I have to rely on coping strategies more than medication for my case. It’s not a big deal and I’m at a point in my life where I can manage my ADHD symptoms in a way that doesn’t affect my life too much. So for me, the side effects of the medication exacerbate my preexisting insomnia to the point that the drawbacks of adderall outweigh the benefits for my particular brand of ADHD.