How is anaphylactic shock treated?
Most manifestations of anaphylaxis, including hypotension, respond well to intramuscular epinephrine. Epinephrine has both α- and β-receptor agonist effects, so it can effectively treat bronchospasm and hypotension.
American Heart Association: 2010 Guidelines for cardiopulmonary resuscitation and emergency cardiovascular care. Part 12.2: Cardiac arrest associated with anaphylaxis. circulation 2010;122:S829-S861.