Current trends in vasopressor use to the operating room: A pharmacoepidemiologic study in French teaching and military hospitals.

Objectives: Phenylephrine, ephedrine and norepinephrine are the vasopressors most commonly used in the operating room to treat anaesthesia-induced hypotension. Two new diluted forms of phenylephrine were released in 2011 (500μg/10mL and 500μg/5mL). We initiated a study to evaluate trends in the use of vasopressors in the operating room in French hospitals over the period 2011-2014.