Description Vilafinil is a brand name for the well-known medicine Modafinil, which is a wakefulness-promoting agent used to treat narcolepsy, obstructive sleep apnea, and shift work sleep disorder. Vilafinil is a highly selective dopamine reuptake inhibitor that enhances wakefulness by increasing dopamine levels in the brain. It's also considered a cognitive booster. Vilafinil should only be...