Epinephrine Injection USP, 1 mg/10 mL (0.1 mg/mL) is supplied as a sterile aqueous solution with a pH range of 2.3–3.5, that is clear, colorless, and nonpyrogenic. Each milliliter contains 0.1 mg epinephrine, 8.16 mg sodium chloride, 0.46 mg sodium metabisulfite, and 2.13 mg citric acid, anhydrous and 0.41 mg sodium citrate, dihydrate added as buffers. Additional citric acid and/or sodium citrate may be added for pH adjustment. The solution contains no preservatives.
This sterile solution is to be administered after dilution by the intravenous route. Epinephrine is a sympathomimetic catecholamine (adrenergic agent) designated chemically as 4-[1-hydroxy-2 (methylamino) ethyl]-1,2 benzenediol, a white, crystalline powder. It has the following structural formula:
The molecular weight of epinephrine is 183.2.
Epinephrine solution deteriorates rapidly on exposure to air or light, turning pink from oxidation to adrenochrome and brown from the formation of melanin.
Chat online with Pfizer Medical Information regarding your inquiry on a Pfizer medicine.
*Contact Medical Information. 8AM-9PM ET Monday to Friday; excluding holidays.
Submit a medical question for Pfizer prescription products.
To report an adverse event related to the Pfizer-BioNTech COVID-19 Vaccine, and you are
not part of a clinical trial* for this product, click the link below to submit your
*If you are involved in a clinical trial for this product, adverse
events should be reported to your coordinating study site.
If you cannot use the above website, or would like to report an adverse event related
to a different Pfizer product, please call Pfizer Safety at
You may also contact the U.S. Food and Drug Administration (FDA) directly to report
adverse events or product quality concerns either online at