Anaphylactic shock and Allergic shock

Anaphylactic shock noun - A severe and rapid and sometimes fatal hypersensitivity reaction to a substance (especially a vaccine or penicillin or shellfish or insect venom) to which the organism has become sensitized by previous exposure.

Allergic shock and anaphylactic shock are semantically related. In some cases you can use "Allergic shock" instead a noun phrase "Anaphylactic shock".

Anaphylactic shock and allergic shock are semantically related. You can use "Anaphylactic shock" instead a noun "Allergic shock".