Eugeroic
Eugeroics (originally "eugrégorique" or "eugregoric"), also known as wakefulness-promoting agents and wakefulness-promoting drugs, are a class of drugs that promote wakefulness and alertness. They are medically indicated for the treatment of certain sleep disorders including excessive daytime sleepiness (EDS) in narcolepsy or obstructive sleep apnea (OSA). Eugeroics are also often prescribed off-label for the treatment of EDS in idiopathic hypersomnia, a rare and often debilitating sleep disorder which currently has no official treatments approved by the Food and Drug Administration (FDA). In contrast to classical psychostimulants, such as methylphenidate and amphetamine, which are also used in  the treatment of these disorders, eugeroics typically do not produce euphoria, and, consequently, have a lower addictive potential. Modafinil and armodafinil are each thought to act as selective, weak, atypical dopamine reuptake inhibitors (DRI), whereas adrafinil acts as a prodrug for modafinil. Other eugeroics include solriamfetol, which acts as a norepinephrine–dopamine reuptake inhibitor (NDRI), and pitolisant, which acts as a histamine 3 (H) receptor antagonist/inverse agonist.