In turn, its influence on the reward circuit can lead a user to bypass survival activities and repeat drug use. Chronic cocaine use can lead to a cocaine addiction and in some cases damage the brain and other organs. An addict will continue to use cocaine even when faced with adverse consequences.
vasodilator (vÄÂ´zÅdÄ«Â´lÄtur), n 1. an agent that causes dilation of the blood vessels. n 2. a drug that relaxes the smooth muscle walls of the blood vessels and increases their diameter.
Vasoconstriction is a narrowing of the blood vessels resulting from contracting of the muscular wall of the vessels. When blood vessels constrict, the flow of blood is restricted or slowed.It is the opposite of vasodilation, the widening of blood vessels.Factors causing vasoconstriction are called vasoconstrictor, also vasopressors or simply pressors. Vasoconstriction usually results in an increase of the blood pressure.asoconstriction is a narrowing of the blood vessels resulting from contracting of the muscular wall of the vessels. When blood vessels constrict, the flow of blood is restricted or slowed.