WAY-300569 is primarily used in scientific research as a selective antagonist for the 5-HT6 receptor, making it a valuable tool in neuroscience and pharmacology studies. It has been investigated for its potential to modulate cognitive functions, particularly in models related to Alzheimer's disease and other cognitive disorders. By blocking the 5-HT6 receptor, WAY-300569 helps researchers understand the role of serotonin signaling in learning and memory. It has also been used to explore the effects of 5-HT6 receptor inhibition on appetite and obesity-related pathways, showing potential anorectic effects in preclinical models. Due to its specificity, it supports the development of novel therapeutics targeting cognitive impairment and metabolic conditions, although it remains strictly for experimental use and is not approved for clinical applications.