Nerves, hormones or substances (like herbs) that induce the relaxation of blood vessels.
An agent that expands blood vessels, allowing more blood to flow through them
n. a drug that causes widening of the blood vessels and therefore an increase in blood flow. Vasodilators are used to lower blood pressure in cases of hypertension. Coronary vasodilators, such as *glyceryl trinitrate, increase the blood flow through the heart and are used to relieve and prevent angina. Large doses of coronary vasodilators cause such side-effects as flushing of the face, severe headache, and fainting. Peripheral vasodilators affect blood flow to the limbs; they include *alpha blockers and some *calcium-channel blockers. Certain of the latter (e.g. *nifedipine) are used to treat conditions due to poor circulation, such as Raynaud’s disease and intermittent claudication.
an agent which dilates the blood vessels.
Substances that dilate blood vessels. Coronary vasodilators, such as NITRATES, CALCIUMCHANNEL BLOCKERS and POTASSIUM-CHANNEL ACTIVATORS, are used in heart failure to improve blood supply to the heart. Peripheral vasodilators affect the blood vessels in the limbs and are used to treat conditions due to poor circulation such as CHILBLAIN and RAYNAUD’S DISEASE.... vasodilators
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