Morphine is a ____.

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Multiple Choice

Morphine is a ____.

Explanation:
Morphine primarily causes venodilation, which reduces venous return to the heart (preload) and lowers myocardial oxygen demand. This preload reduction helps relieve chest pain and the oxygen stress on the heart during ischemia. It is not a bronchodilator, not an inotrope (it does not boost heart muscle contractility), and not a vasoconstrictor (it tends to relax vascular smooth muscle). So the best description of its main action in this context is venodilator.

Morphine primarily causes venodilation, which reduces venous return to the heart (preload) and lowers myocardial oxygen demand. This preload reduction helps relieve chest pain and the oxygen stress on the heart during ischemia. It is not a bronchodilator, not an inotrope (it does not boost heart muscle contractility), and not a vasoconstrictor (it tends to relax vascular smooth muscle). So the best description of its main action in this context is venodilator.

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