Pharmacology Which of the following antihypertensive agents in most likely to cause an exaggerated response to an injected catecholamine? A Propranolol B Hydralazine C A thiazide diuretic D Gauanethidine 💡 Explanation Which of the following antihypertensive agents in most likely to cause an exaggerated response to an injected catecholamine? ✓ Correct Answer: D. Gauanethidine