What action should a CNA take if a patient exhibits signs of an allergic reaction?

When a patient shows signs of an allergic reaction, it is essential for the CNA to monitor the symptoms closely and immediately report their findings to the nursing staff. This approach is critical because allergic reactions can range from mild to severe, and timely intervention can prevent the situation from worsening. Reporting the symptoms allows the nursing staff to assess the situation and determine the appropriate course of action, which may include administering medications or providing medical interventions that are beyond the scope of a CNA's role.

Taking this action ensures that the patient receives the necessary care as soon as possible, especially if they are experiencing severe symptoms that could lead to complications like anaphylaxis. Monitoring the patient's symptoms provides valuable information that can guide the healthcare team in making informed decisions regarding treatment options.

The other options do not align with the best practices for handling allergic reactions. For example, waiting for symptoms to resolve on their own overlooks the potential for escalation. Providing an antihistamine or advising the patient to breathe deeply may not be appropriate or sufficient, depending on the severity of the reaction, and typically requires guidance from licensed medical personnel. Hence, closely monitoring symptoms and communicating them to the nursing staff is the most appropriate and effective action for a CNA in this situation.