Which of the following is an SGLT2 inhibitor?

• A. Metformin
• B. Exenatide
• C. Empagliflozin
• D. Acarbose

Answer: (C)

SGLT2 inhibitors are a class of diabetes medicines that lower blood sugar by blocking the sodium-glucose cotransporter 2 in the kidneys, which reduces glucose reabsorption and promotes its excretion in the urine.

Empagliflozin is a drug in this class, so it fits the mechanism described. Metformin works by reducing liver glucose production and improving insulin sensitivity (it's a biguanide, not an SGLT2 inhibitor). Exenatide is a GLP-1 receptor agonist that enhances insulin secretion and suppresses glucagon. Acarbose inhibits intestinal alpha-glucosidases to slow carbohydrate absorption.