Buy Modafinil(Generic Provigil) 200mg is a prescription medication used to treat excessive sleepiness caused by narcolepsy, shift work sleep disorder, or sleep apnea.It works by altering neurotransmitters in the brain to promote wakefulness. Modafinel 200mg is taken orally, usually once a day in the morning, and its effects can last for up to 12 hours.It is important to note that Modafinil should only be taken under the supervision of a healthcare provider and should not be used as a substitute for sleep.