BUY PROVIGIL ONLINE Without a prescription and save up to 60 % on your first order. Provigil (modafinil) is an oral prescription medication that reduces daytime sleepiness in people with narcolepsy, obstructive sleep apnea, and shift work sleep disorder. It reduces extreme sleepiness due to narcolepsy and other sleep disorders, such as periods of stopped breathing during sleep (obstructive sleep apnea). It is also used to help you stay awake during work hours if you have a work schedule that keeps you from having a normal sleep routine (shift work sleep disorder). Provigil is also available in Provigil 100 mg and Provigil 200 mg Provigil is a central nervous system (CNS) stimulant and is believed to work by increasing the availability of certain chemicals in the brain, most notably dopamine. Provigil is available in tablet form.