Used as a potent immune response modifier, particularly in dermatology and antiviral therapies. It acts as a Toll-like receptor 7 (TLR7) agonist, stimulating the production of cytokines such as interferon-alpha, which enhances the body's natural defense mechanisms. Commonly formulated in topical treatments for skin conditions like actinic keratosis, superficial basal cell carcinoma, and external genital warts. Its ability to induce local immune activation without extensive systemic absorption makes it suitable for targeted therapy. Also investigated for use in vaccine adjuvants and cancer immunotherapy due to its strong immunostimulatory properties.