Long Grove Pharmaceutical's Norepinephrine
Premix Norepinephrine Bitartrate in 0.9% Sodium Chloride

FDA-approved and Ready-to-Use.  Available in the 3 most commonly used strengths; 4mg/250mL (16mcg/mL), 8mg/250mL (32mcg/mL), and 16mg/250mL (64mcg/mL).