<prompt> A patient presented with anaphylactic reactions developed angioedema. Drug of choice for treating this condition is:AdrenalineCoicosteroidAntihistaminicsSodium chromoglycate  <response>: Patients with immediate hypersensitivity histamine-mediated reactions are managed with epinephrine, antihistamines and coicosteroids. The syndrome of bronchospasm, mucous membrane congestion, angioedema, and severe hypotension usually responds rapidly to the parenteral administration of epinephrine, 0.3-0.5 mg 0.3-0.5 mL of a 1:1000 epinephrine solution. Ref: Biaggioni I., Robeson D. 2012. Chapter 9. Adrenoceptor Agonists Sympathomimetic Drugs. In B.G. Katzung, S.B. Masters, A.J. Trevor Eds, Basic Clinical Pharmacology, 12e. 