a shock caused by a severe allergic (immunologic) reacton where a patient who has already produced antibodies to a foreign substance (antigen) develops a systemic antigen – antibody reaction and triggers abnormal dilatation of blood vessels .
· Penicillin sensitivity
· Food items
· Snake venom
· Substances used in diagnosis or treatments
· Blood and blood products (Transfusion reaction)
· Bee sting allergy
· Other substances eg. Pollen , molds etc.
Antigen antibody reaction provoke cells to release patent vasoactive substances such as histamine or bradykinin etc.
Feelings of impending doom
Feeling of lump in throat
hoarseness of voice ,
edema of eyelids
Remove causative agent
Adrenaline is given to stimulate cardiac performance and corticosteroids to reduce inflammatory response.
Cardiac and resparatory support
Tracheostomy if needed