A 24-year-old man with Hodgkin’s lymphoma presents to the emergency department with chest pain for the past 2 days. An electrocardiogram shows nonspecific changes. An echocardiogram is performed that shows dilation of the left ventricle, and the diagnosis of dilated cardiomyopathy is made. He has been receiving chemotherapy for Hodgkin’s lymphoma over the last month. What medication is most likely responsible for his cardiomyopathy?

A 24-year-old man with Hodgkin’s lymphoma presents to the emergency department with chest pain for the past 2 days. An electrocardiogram shows nonspecific changes. An echocardiogram is performed that shows dilation of the left ventricle, and the diagnosis of dilated cardiomyopathy is made. He has been receiving chemotherapy for Hodgkin’s lymphoma over the last month. What medication is most likely responsible for his cardiomyopathy?

A 25-year-old man with multiple sexual partners begins to have flulike symptoms. He visits his doctor who recommends an HIV screening test based on his history. He is found to have an HIV infection and begins a drug regimen. Which of the following works by inhibiting fusion of the virion with T cells?

A 26-year-old man with schizophrenia takes daily codeine for no apparent reason. He does not have issues with upper respiratory disease. Which of the following effects would be least likely to be exhibited by this patient?

A 28-year-old man who suffered a crush injury to his lumbar spine (L4 and L5) with disc herniation is managed with meperidine for pain control. He has been taking this medication for 6 months. In addition to pain relief, which of the following other effects is possible?

A 42-year-old woman who recently immigrated to the United States from Africa presents with diffuse abdominal pain and an unusual rash. The erythematous linear rash spreads from her right upper quadrant to the umbilicus. Laboratory testing confirms the diagnosis of Toxocara canis infection. What is the most appropriate treatment?