A 20-year-old male college student returns from a trip to India complaining of fever and malaise. A peripheral blood smear confirms the suspicion of malaria. The physician prescribes chloroquine and sends the patient home. What is the problem with this physician's choice of treatment of this patient?

A 20-year-old male college student returns from a trip to India complaining of fever and malaise. A peripheral blood smear confirms the suspicion of malaria. The physician prescribes chloroquine and sends the patient home. What is the problem with this physician's choice of treatment of this patient?

A 57-year-old woman presents to the emergency department with crushing chest pain. She reports having a similar episode 2 weeks ago while shoveling snow, but the pain was much less and it went away as soon as she stopped shoveling. An ECG reveals ST segment elevation, and the doctor administers a fibrinolytic drug. Her symptoms resolve, but later she begins to vomit up blood. Which would be an appropriate medication to give now?

A 32-year-old woman found out 1 month ago that she has HIV disease. She began a HAART regimen after learning her HIV status. Now she presents with nausea, vomiting, and abdominal pain. Serum amylase is elevated. If her condition is related to her medications, which drug is most likely the cause of her symptoms?

A 22-year-old sexually active male presents to his primary care physician with painful urination and urethral discharge. Gram stain of discharge fluid shows gram-negative diplococci. He is given ceftriaxone for gonococcal infection. What additional medication, if any, should he be given?

A 67-year-old woman presents to her primary care physician with a viral infection. She has a 45 pack-year history of smoking, and past medical history includes COPD. The virus causing her infection has a specific M2 ion channel that can be blocked by certain antivirals. With which virus is she infected?