Can Clonidine and Metroprolol taken for a duration cause an allergy?
Resistance and allergy
Angioedema is type of allergic reaction.
Person may develop resistance to blood pressure medication after few years so they may fail to control pressure. They do not develop allergy. Resistance and allergy are different mechanisms.
Yes an immunologist can ask for few blood test which can test for allergy. there are no blood tests for resistance but just frequent measuring BP can help identify resistance.