"i&#039;ve been on concerta before and decided to try adderall. i loved the results, ultra focused. at the beginning i was incredibly happy with it. unfortunately, i had a severe allergic reaction to it. i&#039;m not allergic to any other medicines but for some reason adderall got me. if you get extremely itchy on the medicines stop taking it. i kept taking it for a while because i loved the results and the itching got really bad."