Angioendema?can it be caused by ace inhibitors.can a ace test level be decreased in other conditions.emphysema, lung cancer, cystic fibrosis.copd ?

ACE Inhibitors: Angiotensin converting enzyme (ace) inhibitors are the leading cause of drug-induced angioedema in the U.S. Because they are widely prescribed. Most common is swelling of the lips, tongue, or face, although episodic abdominal pain due to intestinal angioedema may occur. Urticaria and itching are notably absent. The rest of the question is too complex to address here. Thanks.