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.
A vasoconstrictor is a drug, agent, or nerve that causes vasoconstriction (= narrowing) of the walls of blood vessels. Nicotine is a vasoconstrictor - it makes the diameter of arteries smaller. A vasoconstrictor will constrict blood vessels and cause an increase in blood pressure. A vasoconstrictor is a drug, agent, or nerve that causes vasoconstriction of the walls of blood vessels.