Which of the following is beta-blocker antagonist: (A) Glucagon, (B) Neostigmine, (C) Ambenonium, (D) All of the above
Answer is A. Ans. is 'a' i.e., GlucagonGlucagon is used in beta-blocker poisoning to combat bradycardia produced by b-blockers. Glucagon acts by increasing C-GMP in myocardium, in effect bypassing p-receptors )Action is independent of beta receptors.