a severe or life-threatening allergic reaction in which the blood vessels dilate, causing a drop in blood pressure, and the tissues lining the respiratory system swell, interfering with the airway. also called anaphylactic shock
a syringe preloaded with medication that has a spring-loaded device that pushes the neddle through the skin when the tip of the device is pressed firmly against the body
a hormone produced by the body. as a medication, it constricts blood vessels and dilates respiratory passages and is used to relieve severe allergic reactions.
red, itchy, possibly raised blotches on the skin that often result from allergic reactions