My ADHD partner started taking Adderall for his ADHD about 18 months ago. He started at a low dose (20 mg, I think) and seemed to do well. He was much less forgetful, more focused, and seemed more productive and happier as a result. However, when he and his doctor decided that the dose was too low and upped it to 40 mg, I started noticing personality changes: wild mood swings, violent temper fits, paranoia, and general agitation, especially in the early am and late pm when the drug wasn't in full effect. I called his doctor with my concerns, but he quickly dismissed them.