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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.
Vasoconstriction is the constriction or narrowing of blood vessels by small muscles in their walls, slowing or blocking blood flow.    Vasoconstriction is the constrictio â¦ n of blood vessels that  increases blood pressure. Answered. In Body Temperature.