Something that causes and allergic reaction.
Exaggerated immune response.
Sever or life threatning alleric reaction in which the blood vessels dilate,blood pressure drops,and the tissues lining the respiratory system swell,compromising airway.
A syringe preloaded with medication.
A hormone produced by the body;as a medication,it constricts blood vessels and dilates respiratory passages.
Red, itchy,possibly raised blotches in the skin that often result from allergic reactions.