Anaphylactic shock requires immediate action. What is the first step a nurse should take?

In the context of anaphylactic shock, the most critical initial action is to stop any ongoing exposure to the allergen, which includes stopping transfusions or medications that may be causing the reaction. This step is essential because it halts the progression of the anaphylactic reaction, which can quickly escalate and lead to severe complications such as respiratory distress or cardiovascular collapse.

Once the allergen is removed from the equation, the subsequent steps typically involve administering epinephrine and providing supportive care, including IV access and monitoring vital signs. For instance, administering antihistamines would not be effective as a first response because they take longer to act, and they do not counteract the more immediate effects of anaphylaxis. Monitoring respiratory rate is also important, but it does not address the underlying issue of the allergen exposure. Thus, stopping the transfusion or medication is the most critical and immediate action a nurse can take to manage the situation effectively.