Used primarily in scientific research to study the pharmacology of orexin receptors, particularly the orexin-1 receptor (OX1R). It acts as a potent and selective antagonist, helping researchers understand the role of orexin signaling in sleep-wake regulation, addiction, and other neurological processes. Due to its selectivity, it is valuable in experiments aiming to isolate OX1R activity from OX2R, making it a tool compound in developing potential treatments for insomnia, anxiety, and substance use disorders. Not intended for clinical use or human consumption.