WAY 100635 Hydrochloride is primarily used in scientific research to study the role of serotonin receptors in the brain. It acts as a selective antagonist for the 5-HT1A receptor, making it a valuable tool for understanding serotonin's involvement in various physiological and psychological processes. Researchers utilize it to investigate conditions such as anxiety, depression, and schizophrenia, as well as to explore the mechanisms of action of antidepressants and antipsychotics. Additionally, it aids in mapping serotonin receptor distribution in the brain, contributing to advancements in neuroscience and pharmacology.