Neuropeptide SF human augments paraventricular corticotrophin-releasing hormone (CRH) release and increases adrenocorticotropic hormone (ACTH) and corticosterone levels in the plasma. Neuropeptide SF human play a physiologic role in the regulation of such circadian functions as the activity of motor centers and the HPA axis, through the release of CRH.

18β,20α-Glycyrrhizin-6′-methylester

Endogenous agonist at orexin receptors (Ki values are 20 and 38 nM for OX1 and OX2 receptors respectively). Stimulates feeding following central administration and may be involved in the control of sleep-wake cycle and other hypothalamic functions.