Anaphylaxis and Anaphylactic shock

Anaphylaxis noun - Hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance.

Anaphylactic shock and anaphylaxis are semantically related. In some cases you can replace phrase "Anaphylactic shock" with "Anaphylaxis", this terms are similar.

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.

Anaphylaxis and anaphylactic shock are semantically related. You can use "Anaphylaxis" instead a noun phrase "Anaphylactic shock".