Is bruising a serious side effect when taking Adderall? My son has been on it about a month now and he has several bruises on his arms and legs. If someone didn't know me, they would think he was being abused which is FAR from the truth. His preschool said something to me about it and so did daycare. I'm taking him to the dr today to get checked out just to make sure he is ok. I'm worried about him..anyone else have this side effect and was it really serious? My husband thinks its just him being a boy, but I have my doubts.