The nurse administers a dose of an intravenous antibiotic to the client. Twenty minutes later the client is complaining of shortness of breath, itching, and difficulty swallowing. Which intervention...

The nurse administers a dose of an intravenous antibiotic to the client. Twenty minutes later the client is complaining of shortness of breath, itching, and difficulty swallowing. Which intervention should the nurse implement first?

1. Prepare to administer subcutaneous epinephrine.

2. Discontinue the client’s intravenous antibiotic.

3. Assess the client’s apical pulse and blood pressure.

4. Administer 10 liters of oxygen via nasal cannula.