WAY-351812 is primarily used in neuroscience research as a potent and selective antagonist for the 5-HT6 receptor subtype. Its main application lies in studying the role of serotonin signaling in cognitive functions, memory, and learning processes. Due to its high selectivity, it serves as a valuable pharmacological tool to investigate the involvement of 5-HT6 receptors in conditions such as Alzheimer's disease, schizophrenia, and other cognitive disorders. It has also been utilized in preclinical studies to assess potential effects on appetite regulation and mood-related behaviors. Its use remains restricted to laboratory and experimental settings, with no current clinical applications approved.