Nuvigil (generic: armodafinil) is a prescription medication used to treat excessive sleepiness linked to narcolepsy, obstructive sleep apnea, and shift work disorder.  Nuvigil belongs to a group of drugs called eugeroics or wakefulness-promoting agents, which alter the amount of a substance in the brain that controls sleep and wakefulness.

This medication comes in tablet form and is taken once a day, with or without food.

Common side effects of Nuvigil include headache, nausea, dizziness, and difficulty sleeping.