KnowraOrexinLinked fromLinked fromThe 4 pages that link to Orexin, each with the reason it gives.All 4Related 4NarcolepsyRelated: Loss of orexin-producing neurons underlies most narcolepsy type 1.ModafinilRelated: Animal studies suggest modafinil can influence orexin-related wake circuits.SomnolenceRelated: Reduced orexin signaling can make wakefulness unstable and promote daytime sleepiness.WakefulnessRelated: Loss of orexin signaling can destabilize waking and cause narcolepsy.