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Dopamine at doses < 3 µg/kg/min causes vasoconstriction
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High dose dopamine acts on a adrenergic receptors
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Furosemide acts on ATP-dependent sodium-pumps in the thick ascending limb
of the loop of Henle
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Furosemide has a proven role in preventing renal failure
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Calcium-channel blockers have a potentially helplful vasodilator effect
on the afferent glomerular arteriole
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