The nurse is caring for the patient with fever, chills, and a cough productive of green sputum. The chest X-ray shows a hazy opacity. The nurse checks the patient's medical history for sensitivity to which medication? 

During a routine physical, the 58-year-old patient reports aching chest pain that occurs only when doing yardwork or heavy cleaning. However, it does not occur every time he is performing these chores. He denies regular exercise and reports a sedentary lifestyle. The nurse anticipates providing which instruction to the patient related to the patient's new prescription for this condition?   

The patient is admitted to the hospital with systemic syphilis infection. The patient is ordered to receive a 14-day course of penicillin G 20 million units/day intravenously. Prior to administering the medication, the nurse checks the patient’s allergies and learns the patient experienced anaphylaxis after receiving ampicillin. Which action does the nurse take?