<prompt> Action of dopamine in 1-2 mcgkgmin dose isVasoconstrictionIncreases renal blood flowIncreases cardiac contractilityIncreases blood pressure  <response>: Ans. B Increases renal blood flowRef: Goodman Gilman 12the p355; KDT 8the p146Dopamine has dose dependent actionsLow dose 1-2 mcgkgmin: It stimulates only D1 receptors leading to renal vasodilation and thus increase in renal blood flow.Medium dose 2-10 mcgkgmin: It stimulates both D1 and beta 1 receptors means it will lead to inotropic action also.High dose 10 mcgkgmin: It stimulates Dl, beta 1 and alpha 1 receptors resulting in additional vasoconstriction. 