Pharmacology 7th Edition by Henry Hitner,Barbara Nagle

Exercise 2

A patient has been brought by ambulance to the emergency room where you work. He's suffering from hypotension, and he's on the verge of cardiovascular collapse. The patient's wife, who accompanied him in the ambulance, says he was fine until he took some new medication for his high blood pressure. She has the bottle with her-the medication is mecamylamine. You ask her if he's taking any other medicine, and she replies that he takes propranolol for his angina. What is producing these effects in this patient