For an allergy attack, what is the recommended treatment?

The recommended treatment for an allergy attack primarily depends on the severity of the symptoms and the nature of the allergy. In the context of severe allergic reactions, such as anaphylaxis, adrenaline injection is the most critical treatment. Adrenaline, also known as epinephrine, works quickly to alleviate symptoms by constricting blood vessels, increasing blood pressure, relaxing the muscles around the airways, and reducing swelling.

Antihistamines are typically used for mild allergic reactions, such as hives or seasonal allergies, by blocking the action of histamines that contribute to allergy symptoms. They can help manage the symptoms but are not sufficient for severe reactions.

Corticosteroids can reduce inflammation and control severe allergic reactions over a longer term; however, they are not the immediate treatment during an acute reaction since their effects take longer to onset.

Oxygen therapy may be necessary if there is respiratory distress, but it does not address the underlying allergic response.

In summary, for an acute and severe allergy attack, particularly one that could involve anaphylaxis, an adrenaline injection is critical as it provides rapid relief from the most life-threatening symptoms. Therefore, this option stands out as the most appropriate treatment in this scenario.