Buy Provigil Online, Provigil is used to treat sleepiness caused by narcolepsy, obstructive sleep apnea, and shift work. It belongs to the class of drugs called stimulants. It comes in 100 mg and 200 mg oral tablets. It is easy to use and has any doctor’s prescription. It is important to take Provigil exactly as prescribed by your doctor. The usual recommended dose for adults is 200 mg taken orally one tablet per day in the morning. If you are using Provigil to treat shift work sleep disorder, you should take it one hour before the start of your shift. Provigil can be taken with or without food. It is important to follow the prescription guidelines and talk to your doctor about any concerns or questions you may have regarding its use.