what is a vasoconstrictor used for
Cirrhosis: Vasoconstrictor Medicines for Variceal Bleeding. Cirrhosis: Vasoconstrictor Medicines for Variceal Bleeding. Medicines that constrict small blood vessels and reduce blood flow to the portal vein are used to treat sudden (acute) bleeding from enlarged veins (varices) in the digestive tract (variceal bleeding). Octreotide is the main medicine used in the United States to treat variceal bleeding.