An allergic reaction occurs when your body attacks a foreign, and typically harmless, substance. Learn about common allergens ...

Drug hypersensitivity reactions are drug reactions which are unpredictable. They result from an interaction between a drug substance and the immune system of a hypersensitive person. Hypersensitivity ...

Either allergic-type reactions or contrast-induced nephropathy may occur after administration of radiographic contrast media. These are entirely different entities with distinct pathophysiologies.

Allergic reactions account for 200,000 visits to US emergency rooms every year, according to the Asthma and Allergy Foundation of America. Often times this is due to the fact that some people aren't ...