"adderall is effective, but it comes with consequences. both to your physical and mental health. i am 27 years old, i have taken adderall on and off for about 10 years. started it my freshman year of college. it was amazing at first! lost that freshman 15, got straight a&#039;s, actually enjoyed my work. then i started noticing the crash symptoms. tired, withdrawn, emotionless, sleepless. i stopped taking it because i hated the way it made me feel, but i realized how much more productive i am when taking it. when i start taking it again my immune system is shot, i&#039;m constantly sick with something, i get super irritable. when i don&#039;t take it i can barely get out of bed and i always gain weight, which always sucks. it&#039;s a vicious cycle."