Like amphetamines, Armodafinil present in Nuvigil Pill helps in staying awake by stimulating the brain. However, the precise mechanism of action is not clearly understood. It is believed to work by elevating the amounts of dopamine, an endogenous chemical that nerves in the brain use to transfer information to one another. They do so by decreasing the reuptake of dopamine into nerves.
The time required for this medication to produce its action is not clinically determined. Also, there is a lack of well-established clinical information available about the duration of action of this medicine. This medication may reduce your sleepiness, but will not cure sleep disorders.