noun. An adrenergic drug, C₉H₁₃NO₂, that is a powerful vasoconstrictor and is used to relieve nasal congestion, dilate the pupils, and maintain blood pressure during anesthesia.

noun. An α-adrenergic receptor agonist; 3-(1-hydroxy-2-methylamino-ethyl)phenol, with the formula C9H13NO2.

noun. a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion

"One study123 evaluated short-term phenylephrine therapy in hyperdynamic septic patients who were not hypotensive at the time of drug administration."

adrenergic  adrenergic drug