<prompt> Which of the following patients is most likely to be treated with intravenous glucagon?A young man who took cocaine and has a blood pressure of 190110 mm HgA middle aged man with type II diabetes who has not taken his regular dose of glipizide for last 4 daysAn old man with severe bradycardia and hypotension resulting from ingestion of overdose of atenololAn old woman with lactic acidosis as a complication of severe infection and shock  <response>: Glucagon : Use in hypoglycemia DOC for beta blocker poisoning A life-threatening adverse cardiac effect of a b antagonist may be overcome directly with isoproterenol or with glucagon glucagon stimulates the hea glucagon receptors, which are not blocked by b antagonists, but neither of these methods is without hazard. 