EMTprep Free Training Materials

Our Free Training Materials include articles, test day tips, study guides and training videos as well as words of advice for both your NREMT journey and EMS career.

Training Categorized: Cardiac Pharmacology

            Epinephrine works by binding to alpha 1 and beta 1 receptors in the body to increase vasoconstriction and increase the positive inotropic and chronotropic effects of the heart. We remember this because of its use in cardiac arrest patients, asthma patients, bradycardic patients, and hypotensive patients. We’ve all used Epinephrine in varying concentrations either IM, SQ, IV, or IO for cardiac arrest calls, anaphylaxis calls, and some respiratory calls because it also affects beta 2 receptors for smooth muscle relaxation in the respiratory tract, and nebulized in pediatrics for croup.

Why would we use an epinephrine drip? These are useful...