Mr. Klein is an 85-year-old man seen in the outpatient clinic for an acute infection. He has informed the health care provider that he is allergic to a variety of antibiotics and is subsequently...

Mr. Klein is an 85-year-old man seen in the outpatient clinic for an acute infection. He has informed the health care provider that he is allergic to a variety of antibiotics and is subsequently prescribed erythromycin estolate. The patient is a recovering alcoholic who has been abstinent for 10 years.

1. What is the significance of Mr. Klein’s history of alcoholism?

2. What possible adverse effect should the nurse instruct the patient to watch for?

3. What laboratory diagnostic studies may be indicated in this patient?