15(R)-15-methyl Prostaglandin D2 is primarily used in research settings to study its effects on inflammation and allergic responses. It acts as a potent agonist for the DP1 and DP2 receptors, making it valuable for investigating the role of prostaglandins in various physiological and pathological processes. In immunology, it helps researchers understand how prostaglandins modulate immune cell behavior, particularly in conditions like asthma and allergic rhinitis. Additionally, it is utilized in pharmacological studies to explore potential therapeutic applications targeting prostaglandin pathways, such as developing anti-inflammatory or allergy-modulating drugs. Its unique structure allows for specific interactions with prostaglandin receptors, providing insights into receptor signaling mechanisms and downstream effects.