SNAP 37889 is primarily used in research settings to study the role of neuropeptide systems in the brain, particularly those involving the neuropeptide S (NPS) receptor. It acts as a selective antagonist for the NPS receptor, making it a valuable tool for investigating the physiological and behavioral effects of NPS signaling. Researchers utilize SNAP 37889 to explore its potential in modulating anxiety, stress responses, and sleep regulation, as the NPS system is known to influence these processes. Additionally, it helps in understanding the receptor's involvement in addiction and reward pathways, providing insights into potential therapeutic targets for neurological and psychiatric disorders. Its application is largely confined to preclinical studies, contributing to the broader understanding of neuropeptide functions and their implications in brain health.