A 25-year-old man comes to the physician for a 1-week history of a rash on his stomach and shoulders. He first noticed the rash after returning from a surfing trip in Florida. It began as a 2-cm pink ellipse on his stomach that he says has slowly spread across his abdomen and onto his shoulders. It is mildly pruritic. A photograph of the rash is shown.
Which of the following is the most appropriate pharmacologic therapy?
Calamine
Clindamycin
Clotrimazole
Mupirocin
Permethrin
Prednisone
Selenium
