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Vasoconstriction is the narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, particularly the large arteries, small arterioles and veins.
This process is the opposite of vasodilation, the widening of blood vessels. Medications that cause vasoconstriction include antihistamines, decongestants and stimulants used to treat ADHD. Vasoconstrictor herbs help to constrict blood vessels and raise blood pressure. Vasoconstrictors are uncommon amongst herbs. Vasoconstrictor herbs causing constriction of capillaries are often used to prevent and treat migraine headaches.
Herbs with Vasoconstrictor properties include