mrcem2-0713

A 72-year-old male visits the emergency department on a weekend complaining of colicky abdominal pain and frequent episodes of diarrhea. The patient mentions that he had given a stool sample to his GP earlier in the week, but he is worried because the diarrhea has worsened. The pathology report confirms the presence of clostridium difficile toxin in the stool sample. Which of the medications the patient regularly takes are known to increase the risk of clostridium difficile diarrhea?