Multiple choice Which of the following is NOT a secondary cause of hypertension? Addison's disease Cushing's disease Renal disease NSAIDs Coarctation of the aorta Reveal answer Fill a bubble to check yourself A Correct answer Explanation Addison's disease causes postural hypotension. Other causes include phaeochromocytoma, Conn's disease and other drugs such as the oral contraceptive pill (OCP) and steroids.