<prompt> Which of the following is antidote for beta-blocker poisoning?Calcium gluconateGlucagonSodium phosphateChloride salts  <response>: Calcium gluconate is antidote for potassium and for MGSO4 Glucagon is used for beta-blocker poisoning which neutralizes bradycardia, hypotension by stimulating cyclic AMP. Ref : KAtzung 12th ed. 