Hydrastinine hydrochloride is primarily used in medical and pharmacological research due to its vasoconstrictive properties. It is often studied for its potential effects on blood vessels, particularly in conditions where vasoconstriction is beneficial, such as epistaxis (nosebleeds) or mucosal hemorrhages. Additionally, it has been explored in the development of treatments for hemorrhages and as a component in experimental therapies aimed at controlling bleeding. Its role in modulating vascular tone makes it a compound of interest in cardiovascular research and related therapeutic applications.