A 30-year-old healthy female is diagosed with community-acquired pneumonia and prescribed erythromycin, but reports to the clinic complaining of vomiting and nausea after one day of therapy. She has a headache and sore throat. Her temperature is 99.6 degrees Fahrenheit, blood pressure is 105/80 mm Hg; heart rate is 88 and respirations are 18/minute. Her lungs have inspiratory crackles and her abdomen is soft, nontender, and nondistended. What is the best management for this patient? A. Stop the erythromycin and switch to azithromycin B. Stop the erythromycin and switch to azithromycin and high-dose amoxicillin C. Stop the erythromycin and initiate therapy with ciprofloxacin D. Obtain a chest X-ray