Piboserod hydrochloride is primarily used in the field of medical research and drug development, particularly in the study of serotonin receptors. It acts as a selective antagonist for the 5-HT4 receptor, making it valuable for investigating the role of these receptors in various physiological and pathological processes. Researchers utilize it to explore its potential therapeutic effects in conditions such as gastrointestinal disorders, cardiovascular diseases, and certain neurological conditions. Its application helps in understanding the mechanisms of serotonin signaling and in the development of targeted treatments for related disorders.