Topic: Postherpetic Neuralgia
Subject: Medicine
A 78-year-old male comes to your office with a 3- day history of pain in the right side of his chest. The pain is described as burning and intense. Two days ago he noted a rash at that site. Examination reveals groups of vesicles on an erythematous base in a T-5 dermatome distribution on the right.
Which one of the following would be the most appropriate treatment to minimize the chance of post-herpetic neuralgia?

A. Famiciclovir (Famvir)

B. Prednisone

C. Capsaicin (Zostrix)

D. Carbamazepine (Tegretol)

Please do not use chat terms. Example: avoid using "grt" instead of "great".