WAY-119574 is primarily used in scientific research to study serotonin receptor activity, particularly as a selective agonist at the 5-HT2C receptor subtype. It has been investigated for its potential to modulate behaviors related to appetite, mood, and impulse control. Due to its action on 5-HT2C receptors, it has served as a pharmacological tool in studies exploring the treatment of obesity, depression, and substance use disorders. Its selectivity makes it valuable for understanding the specific roles of 5-HT2C receptors without significant off-target effects on related serotonin receptors. It is not used clinically and remains restricted to preclinical research settings.