Armodafinil Artvigil 150 mg Tablets are formulated to improve wakefulness and alertness. It does this by affecting the amount of certain natural substances in the human brain that control the sleep cycle and prompt wakefulness. Armodafinil belongs to the wakefulness-promoting agent class of drugs. This drug is a stimulant to treat excessive sleepiness issues such as narcolepsy, obstructive sleep apnea (breathing stops during sleep) and shift work disorder (sleepiness during working hours in people working at night or in shifts) in adults.