A 48-year-old woman has a history of urinary retention and progressive neuromuscular weakness. CT scan does not reveal any abnormalities of the head and neck. Consideration for an edrophonium test is being undertaken by the treating physician. Which of the following statements is correct?

A 48-year-old woman has a history of urinary retention and progressive neuromuscular weakness. CT scan does not reveal any abnormalities of the head and neck. Consideration for an edrophonium test is being undertaken by the treating physician. Which of the following statements is correct?

A 59-year-old man with hypertension is taking a \beta-blocker (acebutolol). His most recent blood pressure is 120 / 78~mmHg. This agent is likely to alter which of the following laboratory values?

A 55-year-old man with hypertension presents for an annual visit. He admits to exercising less and eating fast food more often over the past year. His fasting cholesterol panel shows a total cholesterol of 266mg\dL, LDL of 178mg\dL, and \HDL of 43mg\dL. The physician would like to start him on lovastatin. What lab tests should the physician order prior to starting lovastatin?

A 63-year-old female presents to clinic for a diabetes follow-up. She has been taking metformin for 3 years now, but her blood sugars have not been well controlled over the past year. Her average morning fasting blood sugar is 165mg\dL, and her 2-h postprandial is 205mg\dL. Glimepiride is added to her regimen. What is the mechanism of action of glimepiride?

A 35-year-old man presents to the emergency department complaining of a cough and runny nose of 1-week duration. While being evaluated, it is discovered that his blood pressure is 230 /120~mmHg. An antihypertensive is immediately administered. Later, he develops lactic acidosis, headache, vertigo, and confusion. Which of the following initial therapies would best treat his new symptoms?