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A member asked:

Why does codeine cause vasodilation in the body but vasoconstriction in the lungs?

A doctor has provided 1 answer

Doubtful: While vasodilitation has been reported I could not find evidence for vasoconstriction in lungs. exact mechanism is not clear. Personally I have not found any significant drop in BP in scores of patients taking codeine.

Answered 9/14/2017

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