<prompt> DOC for anaphylaxis is -MorphineAdrenalineHydrocortisoneChlorpheniramine  <response>: Ans. is b i.e., Adrenaline Treatment of anaphylactic shock First adrenaline should be given im to raise the blood pressure and to dilate the bronchi. If the treatment is delayed and shock has developed, adrenaline should be given i.v. by slow injection. The adrenaline should be accompanied by H1 antihistaminic Chlorphenamine and hydrocortisone - Antihistaminic slowly antagonizes the effect of histamine on H receptors, and steroids reduce vascular permeability suppresses further response to the antigen-antibody reaction. 