WAY-662041 is primarily used in scientific research to investigate the function and pharmacology of sigma receptors, particularly the sigma-1 receptor subtype. It acts as a potent and selective antagonist, making it a valuable tool for studying neurological pathways involved in pain, neurodegenerative diseases, and psychiatric disorders such as depression and schizophrenia. Due to its high selectivity, it helps researchers differentiate sigma-1 mediated effects from those involving other receptor systems. It is not used clinically but supports the development of novel therapeutics targeting sigma receptor pathways. Its application is largely confined to in vitro and in vivo preclinical studies.