Berberine hydrochloride is an isoquinoline alkaloid isolated from a variety of herbs, including Coptidis rhizoma, Phellodendron Chinense Schneid, and Phellodendron amurense, and has diverse pharmacological actions. It has antidiabetic and anti-lipid peroxidation activity, as well as an anti-atherosclerotic action, and also has neuroprotective properties and improves polycystic ovary syndrome. Berberine hydrochloride is widely used as an antibacterial, antifungal, and anti-inflammatory drug.