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During anaphylaxis, what drug should you consider first?

  1. Adrenaline

  2. Corticosteroids

  3. Diphenhydramine

  4. Epinephrine

The correct answer is: Epinephrine

During anaphylaxis, the immediate treatment is to administer epinephrine. This is because it helps to quickly reverse the dangerous symptoms of anaphylaxis, such as difficulty breathing and dangerously low blood pressure. Adrenaline is the same as epinephrine, so A is the correct option. Corticosteroids and diphenhydramine are not the recommended first-line treatment for anaphylaxis, as they do not act quickly enough to reverse the severe symptoms. However, they may be used as supplementary or follow-up treatment.