Buy Provigil online from Careskit to get discounts over it. Careskit pharmacy sites provide all medicines that you need. Buying Provigil online you can save money, time and effort. Provigil is a medication that promotes wakefulness.It is used to treat excessive sleepiness caused by sleep apnea, narcolepsy, or shift work sleep disorder. This may also be used for purposes not listed in this medication guide. Provigil, a central nervous system (CNS) stimulant, is believed to work by increasing the availability of certain chemicals in the brain, most notably dopamine.