Hydrastine is an alkaloid primarily used in the pharmaceutical and medical fields as a key component in formulations for treating gastrointestinal disorders, such as ulcers and diarrhea. Its astringent and hemostatic properties aid in reducing inflammation and controlling bleeding in the digestive tract. It is also applied in topical preparations for mucous membrane inflammations, including ophthalmic, nasal, and respiratory applications. In research settings, hydrastine is investigated for its antimicrobial activity against bacteria, fungi, and protozoa, with potential applications in developing new antimicrobial agents. In traditional herbal medicine, it is incorporated into remedies for supporting digestive health and immune function, though its use is limited due to potential toxicity.