What medication is commonly administered for allergic reactions?

Epinephrine is commonly administered for allergic reactions, particularly in cases of anaphylaxis, which is a severe and potentially life-threatening allergic reaction. This medication works quickly to constrict blood vessels, which raises blood pressure and reduces swelling. Additionally, epinephrine relaxes the muscles around the airways, helping to alleviate difficulty in breathing and a feeling of tightness in the chest.

Its rapid action is crucial in an emergency situation, as it can effectively reverse the most dangerous symptoms of severe allergic reactions. It is typically delivered via an auto-injector, making it readily available for individuals with known severe allergies. This is why epinephrine is the preferred choice in situations involving life-threatening allergic reactions.

While antihistamines are also used to treat allergies, they take longer to act and are not effective in severe reactions that require immediate treatment, which is why they are not the first-line medication in such cases. Aspirin and ephedrine are not typically indicated for allergic reactions, further supporting why epinephrine is the most suitable choice.