Epinephrine is a small endogenous catecholamine with multiple uses in emergencies. In most clinical settings, epinephrine comes packaged in 2 forms: a 1:1000 (1 mg/mL) ampule or vial that must be diluted before intravenous (IV) use, and a 1:10,000 (1 mg/10 mL; 100 µg/mL) prepackaged syringe that is ready for IV use. 1 In true emergency situations requiring epinephrine, 100 µg/mL solutions of epinephrine are typically used during advanced cardiac life support for cardiac arrest. 2 During more urgent situations, such as mild refractory hypotension, bronchospasm