Buy Modafinil Online, Modafinil (Brand name: Provigil) is a wakefulness-promoting prescription drug that reduces the extreme sleepiness accompanying sleep disorders including narcolepsy, obstructive sleep apnea, and shift work disorder (SWD). It is sometimes used off-label to treat symptoms of ADHD in adults 18 years of age and older. The FDA does not approve this use, but some research has shown improvement in ADHD symptoms compared to a placebo. According to the FDA, modafinil is a federally controlled substance (C-IV) because it can be abused or lead to dependence. The safety and effectiveness of children has not been established.