Primarily utilized in research settings, SB 200646 HCl is a selective antagonist for the 5-HT2B and 5-HT2C receptors. It is extensively used in neuroscience studies to investigate the role of these serotonin receptors in various physiological and behavioral processes. Researchers employ it to explore its effects on mood regulation, anxiety, and feeding behavior, providing insights into potential therapeutic targets for psychiatric and metabolic disorders. Additionally, it aids in understanding the mechanisms underlying serotonin-related pathways in the central nervous system.