A Patient Has Been Taking Antibiotics to Treat Recurrent Pneumonia

A patient has been taking antibiotics to treat recurrent pneumonia.The patient is in the clinic after having diarrhea for 5 days with six to seven liquid stools each day.The primary care NP should:

A) obtain a stool specimen and order vancomycin.
B) order testing for Clostridium difficile and consider metronidazole therapy.
C) prescribe diphenoxylate (Lomotil) to provide symptomatic relief.
D) reassure the patient that diarrhea is a common side effect of antibiotic therapy.