Individuals suffering from daytime drowsiness can improve their condition and restore their sleep-wake schedule with the correct dose of a popular cognitive enhancer called Modafinil. It eliminates fatigue, promotes wakefulness, raises concentration levels, sharpens the brain and reduces reaction time. Modafinil is also prescribed in the treatment of narcolepsy, sleep apnea, shift work sleep disorder and attention deficit hyperactivity disorder (ADHD). A user can buy Modafinil online from the website of a reliable drug supplier.