<prompt> Which one of the following medications is most likely to be responsible for this appearance?ClarithromycinDexamethasoneDoxorubicinEfavirenz  <response>: Answer C. DoxorubicinSeveral chemotherapeutic drugs including doxorubin and cyclophosphamide cause dyspigmentation. Other groups of drugs that cause this problem include antimalarials, amiodarone, heavy metals but not iron, tetracyclines, and antipsychotics. 