I will collect data regarding utility of Steroid in Allergic reaction in this post:
ASCIA Guidelines – Acute Management of Anaphylaxis
Steroid Management of Allergic Reactions and Anaphylaxis in the Emergency Room
Do Corticosteroids Prevent Biphasic Anaphylaxis?
Biphasic anaphylaxis: A review of the literature and implications for emergency management
Corticosteroids in management of anaphylaxis; a systematic review of evidence