Question

question 33 2 pts can cause mast cell tumor activation and histamine release that may result in severe hypotension. therefore use of this drug is contraindicated in mast cell tumor patients. morphine diphenhydramine antihistamine serotonin

Explanation:

Morphine can cause mast - cell tumor activation and histamine release leading to severe hypotension, making it contraindicated in mast cell tumor patients. Diphenhydramine and antihistamines block histamine effects and serotonin is not related to this specific histamine - related issue in mast cell tumors.

Answer:

Morphine