any advice or experiences that could help me understand would be really helpful please. My brother has started university to study architecture this year and due to the huge amount of nights he had to work, started going on modafinil. Now that the year is finished and he's not taking it however, he has become aggressive, irrational and rude. Does anyone know if this is because of the modafinil or if there's a link. He's changed so much and is doing irrepairable damage to our family, I'd just like to know why.