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Old 08-09-2011
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Drug Epinephrine Effect on Respiration!

A 32-year-old woman with pheochromocytoma is being treated with phenoxybenzamine. After surgical excision of the tumor, the patient has an episode of hypotension requiring 30 seconds of cardiopulmonary resuscitation and subsequent treatment in the intensive care unit. The attending physician asks his intern what physiologic responses he would expect to see if the patient had been given epinephrine during resuscitation. What would have been observed following administration of epinephrine?

(A) Decrease in blood pressure
(B) Decrease in heart rate
(C) Increase in blood pressure
(D) Increase in respiratory rate
(E) No changes in vital signs



Answer with explanation plz thanks in advance...
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Old 08-09-2011
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Correct Answer ans A..

they r given phenoxybenzamine its alpha blocker.. so epineprines beta action unopposed.. its laeds to dec in BP,,,
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Old 08-10-2011
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irreversible blockade of alpha receptors so epi acts on beta 1 n 2 so increase HR n decrease BP
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