What Are the Uses of Bear Bile Eye Drops?

Bear bile eye drops are a traditional Chinese medicine preparation historically used for conditions involving ocular inflammation and heat accumulation, such as conjunctivitis, blepharitis, and early-stage corneal opacity. The active components—primarily tauroursodeoxycholic acid (TUDCA) and other bile acids—are believed to exert anti-inflammatory, choleretic, and mild antioxidant effects. However, it is critical to emphasize that robust clinical evidence supporting the efficacy and safety of bear bile eye drops in modern ophthalmology is lacking. No randomized controlled trials have demonstrated superiority over standard therapies, and regulatory agencies including the U.S. FDA and the European Medicines Agency have not approved bear bile-derived products for ocular use.

Moreover, ethical and conservation concerns significantly limit clinical relevance: harvesting bile from live bears—often via invasive, unanesthetized procedures—constitutes severe animal cruelty and violates international wildlife protection conventions. Many countries, including China, have strengthened bans on bear farming and bile extraction, and reputable hospitals and academic institutions no longer endorse or stock such preparations.

In contemporary practice, evidence-based alternatives—including topical antibiotics (e.g., moxifloxacin), corticosteroids (e.g., loteprednol etabonate), or nonsteroidal anti-inflammatory agents (e.g., ketorolac)—are preferred for inflammatory eye conditions. Patients presenting with ocular symptoms should seek evaluation by a board-certified ophthalmologist to ensure accurate diagnosis and appropriate, guideline-concordant management.