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.

Herbs with Vasodilator properties expand blood vessels and lower blood pressure. Many herbs act on smooth muscle to reduce tone, (i.e., spasmolytics).

Vasodilator Herbs that are primarily used for relaxing arterial tone (vasodilators) are included here.