The initial management of a patient experiencing a severe allergic reaction is to?

The initial management of a patient experiencing a severe allergic reaction, particularly anaphylaxis, is focused on ensuring that the airway is patent and administering oxygen if needed. In such emergencies, maintaining an open airway is critical because swelling in the throat or tongue can lead to asphyxiation. Oxygen may be administered to ensure that the patient is receiving adequate breathing support, especially if they're experiencing difficulty in breathing.

While other options like giving oral antihistamines or transporting the patient to the hospital are part of the overall management plan, they are not immediate interventions. Oral antihistamines take time to work and are not recommended for severe reactions where rapid response is crucial. Transporting the patient is indeed important, but it should come after ensuring the patient’s airway is secure and they are stabilized. Evaluating the patient's allergies is useful for understanding triggers and planning future management, but this should not take precedence over immediate lifesaving actions.

Thus, the correct initial management emphasizes the importance of airway management and oxygen support in addressing the life-threatening aspects of a severe allergic reaction.