Answer and Explanation 19

19.  B is the correct answer.  Angioedema is a common adverse reaction seen in patients who take ACE inhibitors.  These patients often lack C1 esterase which we treat with fresh frozen plasma.  Patients who take ACE inhibitors will have elevated bradykinnin levels but that is often what causes the dry cough.  Prostaglandins is helps lower blood pressure in patients who take ACE inhibitors.  Phosphodiesterase has nothing to do with this mechanism.