Neuropeptide SF (human) acetate augments paraventricular corticotrophin-releasing hormone (CRH) release and increases adrenocorticotropic hormone (ACTH) and corticosterone levels in the plasma. Neuropeptide SF (human) acetate 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[1].