is modafinil a stimulant for adhd is modafinil a mild stimulant is modafinil a cns stimulant is modafinil non stimulant is provigil stimulant is modafinil a strong stimulant is modafinil a stimulant reddit is modafinil a stimulant drug is modafinil a stimulant like adderall is modafinil stimulant