56. Dopamine acts on dopamine receptors in renal vasculature causing vasodilation, increase GFR, and increase renal blood flow (RBF), and sodium excretion.
57. Dobutamine has beta1>beta2 increases HR, used in CHF and cause tachyphylaxis.58. NE acts on alpha 1 & 2, beta 1, and no beta 2 actions, increase HR, and increase PVR.
59. EP low doses affect beta-receptors and a high dose affects alpha-receptors, it is used in anaphylaxis.
60. Dopamine in low dose effects renal blood flow, medium increase HR.
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