<qa>  What is the safe, orally administered wakefulness-promoting agent approved for use in adults withModafinil is a safe, orally administered wakefulness-promoting agent approved for use in adults suffering from narcolepsy, idiopathic hypersomnia, obstructive sleep apnea, and shift work sleep syndrome. Since its FDA approval, it has been used for many additional varied conditions including depression, fatigue, fibromyalgia, myotonic dystrophy, organic brain syndrome, sleep deprivation, Parkinsons, and drug-induced somnolence. It has also been used in helicopter and airplane pilots to enhance their attentiveness during long flights. Some of our SLE patients have been prescribed modafinil for narcolepsy or associated fatigue. 