Nuvigil contains a nootropic agent as an active ingredient called Armodafinil. Its chemical structure is classified as R-enantiomer of modafinil. The mechanism of Armodafinil is not completely known yet. Though, researchers and experts say that this potent chemically active drug acts on an individual’s central nervous system (CNS). It specifically acts on certain neurotransmitters, aka brain chemicals. Neurotransmitters are known to control the sleep/wake cycle. Therefore, Armodafinil in Nuvigil Generic helps to keep awake and alert by improving cognitive function.