<prompt> A 70 years old man was administered penicillin i.v. Within 5 minutes, he developed generalized urticaria, swelling of lips, hypotension and bronchospasm. The first choice is to administer:Chlorpheniramine injEpinephrine inj.High dose hydrocortisone tabletNebulized salbutamol  <response>: Ans. B Epinephrine inj Ref: KDT 8the p149Epinephrine adrenaline is the drug of choice for anaphylactic shock. It is given by s.c. or i.m. route in a concentration of 1:1000. Intravenous route is rarely used but at much lower 1:10,000 concentration. 