The present disclosure includes compositions and methods for administering to a human subject one or more orexin type 2
receptor agonists in one or more dosage forms in an amount and frequency that provides a wake-promoting
blood plasma concentration of orexin type 2
receptor agonist during a portion of waking hours of a twenty-four-hour period, and a
blood plasma concentration of orexin type 2
receptor agonist at or below a maximum non-awakening
plasma concentration of the
agonist for the remainder of the twenty-four-hour period. Also disclosed are compositions and methods for treating
narcolepsy type 1 (NT1) or the symptoms of
narcolepsy type 1, in a human in need of said treatment by maintaining a wake-promoting
blood plasma concentration of orexin type 2 receptor agonist during a portion of waking hours of a twenty-four-hour period, and a blood
plasma concentration of orexin type 2 receptor agonist at or below a maximum non-awakening
plasma concentration of the agonist for the remainder of the twenty-four-hour period.