"i was on adderall for 12 years after diagnosed with adhd. i have always had problems being tired all the time and that helped along with the other sytoms. i have fallen asleep driving etc. i saw a neurologist his recommendation was a sleep specialist and take me off the adderall. my regular doctor weaned me off the adderall and started the modafinl. i started with 100 mg at the end off the adderall then went to 200 mg alone that done nothing she upped it to 400mg and it helped for a few months now it&#039;s like i&#039;m taking a sugar pill it does nothing. i can not function or stay awake. now going for sleep study."