Setipiprant is a highly selective CRTH2 receptor antagonist that exerts its therapeutic effects by specifically blocking the binding pathway of prostaglandin D2 (PGD2) to CRTH2 receptors, thereby effectively modulating various inflammatory responses and immune processes. This compound demonstrates unique advantages in treating androgenetic alopecia, where it potently inhibits PGD2-induced hair follicle miniaturization, improves the perifollicular microenvironment, and promotes the restoration of healthy hair growth cycles. In allergic respiratory diseases such as asthma, Setipiprant exhibits remarkable intervention efficacy by reducing eosinophil infiltration and suppressing Th2-type immune responses, which alleviates airway hyperresponsiveness and inflammatory damage. Emerging research also suggests its potential benefits in atopic dermatitis and other allergic conditions through modulation of mast cell activation and cytokine release. With its carefully optimized molecular structure, Setipiprant maintains exceptional receptor selectivity while demonstrating favorable tissue distribution characteristics and metabolic stability, making it an ideal candidate for the long-term management of chronic inflammatory disorders. The compound's multi-faceted pharmacological profile continues to attract significant interest in both dermatological and respiratory therapeutic areas.