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: Emergency Medications

            We will discuss what nitroglycerine does in the body, what it is used for, and what the doses are. To start off, nitroglycerine is a vasodilator which means it causes smooth muscle in the vasculature to relax thereby decreasing blood pressure and decreasing workload on the heart. It can be used to treat angina, myocardial infarctions, hypertension, and acute pulmonary edema.

            How does nitroglycerine work? Nitroglycerine is a nitrate that causes systemic vasodilation which means it works more on veins than arteries. The nitroglycerine is converted into nitric oxide in the body which in turn causes vasodilation, relaxes smooth...

            Dopamine works in the body by binding to alpha 1 and beta 1 receptors to increase peripheral arterial and venous constriction and increase cardiac contractility and heart rate. Alpha 1 receptors are found in smooth muscle vasculature and control vasoconstriction and Beta 1 receptors are typically found in the heart and control inotropy and chronotropy. In lower doses from 1-5 mcg/kg/min it mostly affects the renal arteries and in doses from 5-20 mcg/kg/min, it increases its inotropic and chronotropic effects on the heart and systemic vasoconstriction. This is important because in lower doses it does not affect cardiac contractility and may...