Armodafinil may be used to improve wakefulness in adults who are very sleepy due to narcolepsy, obstructive sleep apnea (OSA), or shift work disorder (SWD).

Armodafinil is taken in combination with other treatments for sleep disorders.
Use of armodafinil does not replace using your CPAP machine or other treatments that your doctor has prescribed for OSA. Continue to use these treatments.
Armodafinil is not a cure. It may help the sleepiness caused by these conditions, but it may not stop all your sleepiness and does not take the place of getting enough sleep. Follow your doctor’s advice about good sleep habits and using other treatments.
Armodafinil's mechanism of action is thought to involve dopamine transporter (DAT) inhibition, although the exact way it works for sleep disorders is not known. While similar to stimulants like amphetamine and methylphenidate, armodafinil has a different chemical structure. Armodafinil belongs to the drug class called CNS stimulants.

Armodafinil is classified as a Schedule IV (4) controlled substancedue to its potential for misuse and dependence. Misuse is illegal and harmful and you should always keep it in a safe place and never share it with others. Tell your doctor if you have a history of substance abuse.

Armodafinil gained FDA approval on June 15, 2007, under the brand name Nuvigil. Armodafinil is available as a generic and as the brand Nuvigil.