Review Question - QID 217070

A 63-year-old man presents to his primary care physician with a painful rash on his left flank that began 1 day prior. He had preceding symptoms of fatigue and a burning sensation at the involved site. He has never had similar symptoms in the past and is otherwise healthy. He smokes 1 pack of cigarettes a week and drinks alcohol socially. His temperature is 99.1°F (37.3°C), blood pressure is 118/73 mmHg, pulse is 91/min, and respirations are 12/min. Physical exam is notable for the finding in Figure A. He has no other findings on exam and the rash is minimally tender on palpation. Which of the following is the most effective management of this patient's pain?