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At very low doses, dopamine acts on visceral vasculature leading to vasodilation and increased urinary output. At slightly higher doses, dopamine acts to simulate alpha and beta receptors which increases HR and cardiac contractile force.
1-3 mcg/kg/min for renal effects; 3-10 mcg/kg/min for inotropic effects
Low CO, CHF
Inotropic agent, increased organ perfusion leading to increased urine output
Site of Action
Alpha and beta receptors
https://www.ncbi.nlm.nih.gov/books/NBK535451/ The Manual of Clinical Perfusion pg. 229