Anaphylactic shock is a generalized allergic reaction of an immediate type, accompanied by a decrease in blood pressure and a violation of the blood supply to vital organs. The term “anaphylaxis” (translated from the Greek “defense”) was first introduced by French scientists Charles Richet (S.). Richet) and Paul Portier (P. Portier) in 1902. to indicate an unusual, sometimes fatal reaction in dogs that occurs when toxic acne serum and actinium tentacle extract are reintroduced. Initially, anaphylaxis was considered an experimental phenomenon, but later it was described in humans.