Chemotherapy Biotherapy Certification ONS Practice Test 2025 - Free Practice Questions and Study Guide

When a patient exhibits signs of anaphylaxis during treatment, the immediate priority is to ensure the patient's safety and address the life-threatening reaction promptly. Administering oxygen and calling for emergency help is the correct action because anaphylaxis can lead to airway obstruction, difficulty breathing, and a drop in blood pressure, all of which require rapid medical intervention.

Administering oxygen helps to improve oxygenation, and calling for emergency help ensures that appropriate medical assistance is on its way, which may include interventions like epinephrine administration and advanced airway management. Taking these actions can be life-saving and should be the first response when signs of anaphylaxis are noted.

Continuing treatment or checking the patient's chart for allergies is inappropriate in this situation, as it can delay critical care. Providing a snack is also not relevant and could potentially exacerbate the situation if the patient's airway is compromised or if they are unable to swallow due to swelling.