Suis Feuis Puwis is a traditional animal-derived medicinal material prepared by drying and processing pig bile. Its primary active components include conjugated bile acids (such as hyocholic acid and hyodeoxycholic acid), bilirubin, and mucoproteins. Characterized by its bitter-cold properties in traditional medicine, it has been historically used to clear heat, improve vision, resolve phlegm, and relieve cough. Modern pharmacological studies have confirmed its choleretic effect, cholesterol gallstone-dissolving capacity, and broad-spectrum antibacterial activity. Its unique bile acid composition (e.g., high hyodeoxycholic acid content) gives it distinct advantages in treating biliary tract diseases. The current Chinese Pharmacopoeia specifies strict quality control requirements for its bile acid content and microbial limits.