Provigil is a prescribed medication used for the treatment of ADHD. Provigil is also called Modafinil as well as a brand name of Provigil. It is used by adults for daytime sleep cause of Narcolepsy and For children enhance focus disorder. Also, it is approved by Food and drug administration in the United States. The blood concentration of Provigil typically reaches its peak 1 to 2 hours after consumption. But for some people, the benefits may begin to occur within just 30 minutes.