WAY-647802 is primarily used in scientific research as a selective antagonist for the 5-HT2C receptor, a subtype of serotonin receptor. Its main application lies in neuropharmacological studies, where it helps researchers understand the role of serotonin signaling in behaviors related to mood, appetite, and cognition. Due to its selectivity, it is valuable in experiments designed to isolate the effects of 5-HT2C receptor activity from other serotonin receptor subtypes. It has been employed in animal models to investigate conditions such as depression, anxiety, and obesity, helping to clarify the therapeutic potential of modulating this receptor pathway. WAY-647802 is not used clinically and remains restricted to laboratory and experimental settings.