Vasopressors are drugs which cause constriction of the veins as a result of the contraction of the walls of the vessels. Vasopression is the opposite of vasodilation.
Recommended Resources
Hemodynamic Pharmacology of Intravenous Vasopressors
Pharmacological article displays details about vasopressors, how they cause constriction of the blood vessels, and their use as positive inotropes.
http://ccn.aacnjournals.org/content/23/4/79.full
Delves into various vasopressors, including dobutamine, dopamine, pitressin and dispenses details about dosing, IV bolus therapy, and predominant effects.
http://www.globalrph.com/icu-agents.htm
Offers data regarding vasopressor agents in regards to their treatment of circulatory shock in critically ill patients.
http://www.cochrane.org/reviews/en/ab003709.html
