A patient experiencing a blood transfusion reaction is prescribed to receive epinephrine. What is the purpose of this medication when given for this indication?

Epinephrine is commonly administered during a blood transfusion reaction primarily to relieve respiratory distress. In such reactions, symptoms can include bronchospasm and significant difficulty breathing due to an allergic response or anaphylaxis. Epinephrine acts as a bronchodilator, relaxing the muscles in the airways and allowing for improved airflow, thus alleviating respiratory distress.

Additionally, epinephrine has other effects, such as increasing heart rate and blood pressure, but its primary role in this context is to address life-threatening breathing issues that may arise during an allergic reaction. This is critical in ensuring patient safety and stabilizing their condition during a transfusion reaction.