An agent that promotes decrease in blood vessel diameter. Used in dentistry to prolong anesthesia, and to reduce bleeding during surgical procedures.
Drug that causes constriction of blood vessels.
A substance that causes a narrowing of the blood vessels.
Causes contraction in the walls of the blood vessels.
A substance that constricts (i.e., narrows) blood vessels; constriction can be caused by substances normally present in the body and by some medications. Vasoconstriction of arterioles is mainly responsible for elevating blood pressure.
An agent or compound that acts to decrease the caliber of blood vessels, vasoconstriction, vasodilation.
A chemical substance which makes blood vessels become narrower, so that blood pressure rises, e.g. ephedrine hydrochloride.
Agent that causes a narrowing of the opening of a blood vessel. Cold, stress, nicotine, epinephrine, norephine-phrine, angiotensin, vasopressin, and certain drugs are vasoconstrictors, maintaining or increasing blood pressure.
An agent that causes narrowing of the blood vessels and therefore a decrease in blood flow. Examples are cyclopentamine. methoxamine. and phenylephrine. Vasoconstrictors are used to raise the blood pressure in disorders of the circulation, shock, or severe bleeding and to maintain blood pressure during surgery. Some vasoconstrictors (e.g. xylometazoline) have a rapid effect when applied to mucous membranes and may be used to relieve nasal congestion. If the blood pressure rises too quickly headache and vomiting may occur.
Vasoconstrictor sympathomimetic drugs, such as ephedrine and noradrenaline, raise the blood pressure temporarily by acting on receptors that constrict peripheral blood vessels. They are occasionally used as a quick way of raising blood pressure when other measures have failed, but they have potentially serious side-effects on the kidney. Vasoconstrictors are also used with local anaesthetics to counteract the latter’s vasodilator effect. Adrenaline will reduce local blood flow, slow the absorption of anaesthetic and prolong its effect.
A substance that constricts the blood vessels so causing a decrease in blood flow and an increase in blood pressure.
This substance is known to instigate the constriction of blood vessels, leading to a decrease in blood flow and an increase in blood pressure. It is commonly referred to as vasopressors due to its characteristic of inducing the constriction of blood vessels.