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its depend upon the dosage of dopamine given via iv

2 to 5microgram/kg/min called renal dosage it binds to D1 receptor which causes dilation of blood vessel,increasing blood flow to the renal ,mesenteric and coronary arteries

5 to10 microgram/kg/min have positive inotropic and chronotropic effect by acting on beta1 receptor on heart

10 to 20 microgram/kg/min causes vasoconstriction by acting on alpha1 receptor

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13y ago

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Dopamine is a neurotransmitter that acts as both a vasoconstrictor and vasodilator depending on the dose. At low doses, dopamine preferentially dilates blood vessels in the kidneys, mesentery, and heart, while at higher doses, it primarily constricts blood vessels systemically.

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10mo ago
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Q: Is dopamine a vasoconstrictor
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