"i&#039;m 24 years old and have taken adderall over the course of 10 years. i know the only side effect i couldn&#039;t control is the stunting of my growth. i&#039;m 5&#039;7&quot; and i only grew 1/2 inch in high school. i&#039;m given 90, 30mg monthly. it has always improved my grades, however knowing that tolerance builds i do not take it all the time. remember you have to take care of your body, especially your heart and liver, because long-term use side effects are still not concisely known."