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Which of the follwing patients is most likely to be treated with intravenous glucagon?

A
A young man who took cocaine and has a blood pressure of 190/110 mm Hg
B
A middle aged man with type II diabetes who has not taken his regular dose of glipizide for last 4 days
C
An old man with severe bradycardia and hypotension resulting from ingestion of overdose of atenolol
D
An old woman with lactic acidosis as a complication of severe infection and shock
High-Yield Explanation
(Ref: KDT 6/e p274) Glucagon is the antidote of b-blocker poisoning. It acts by increasing cAMP in the hea stimulation of glucagon receptors. Cyclic AMP stinulates the hea. Calcium gluconate can also be used for the treatment of b-blocker poisoning.
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