What should you do immediately after a severe allergic reaction?

Administering an epinephrine auto-injector (EpiPen) is the appropriate immediate response to a severe allergic reaction, particularly anaphylaxis. Epinephrine works swiftly to counteract the severe symptoms associated with anaphylaxis, such as difficulty breathing, swelling of the throat, and a sudden drop in blood pressure. The rapid action of epinephrine can stabilize the individual and potentially save their life by reversing the severe effects of the allergic reaction.

Timely administration of this medication can make a critical difference in the outcome, as the effects of anaphylaxis can escalate quickly. Following the use of the auto-injector, it is essential to call for emergency services to ensure that the person receives further medical evaluation and treatment, as further medical intervention may be necessary.

The other options are not suitable immediate responses. Waiting for emergency services without using epinephrine can lead to a worsening condition. Providing water may not be appropriate, especially if the person is having difficulty breathing or swallowing. Giving a different type of medication may not address the immediate life-threatening symptoms associated with anaphylaxis and could delay the necessary intervention.