A 54-year-old man with elevated cholesterol levels is treated with niacin. Within 2 weeks of starting therapy, he develops an uncomfortable feeling of warmth and itchiness. Which of the following is the most appropriate next step in the management of this patient?

A 54-year-old man with elevated cholesterol levels is treated with niacin. Within 2 weeks of starting therapy, he develops an uncomfortable feeling of warmth and itchiness. Which of the following is the most appropriate next step in the management of this patient?

A 57-year-old man with hyperlipidemia presents to the emergency department with severe pain in his first right toe. The pain is a 10 /10 and worse with any contact. The toe is erythematous, inflamed, and warm to touch. Joint aspiration confirms gout. He had an episode of gout about 10 years ago. What medication used to treat his hyperlipidemia may have led to his gout flare?

A 23-year-old healthy man receives an infusion of 100~mL of glucose solution. Which of the following curves would represent his plasma insulin concentration at 2~min after infusion?

A 75-year-old man with metastatic prostate cancer is placed on leuprolide administered monthly in an intramuscular injection. This agent will act at which of the following areas on the succeeding diagram?

A diagram of the menstrual cycle in a 19-year-old woman who complains of dysmenorrhea is shown as follows. Which of the following points represents the highest level of estradiol?