Dopamine all of the following is true Except?

Dopamine all of the following is true
Except?
a) Causes increase in GI Isehemia
b) Positive ionotropic
c) Improves renal perfusion
d) Causes Vasoconstriction
Correct Answer - A
Ans. is ‘a’ i.e., Causes increase in GI Ischemia
o Dopamine acts on dopamine (Di & D2) and adrenergic (a1 + a2 +
[31) receptors, with no action on p, receptors.
o At lowest effective dose it stimulates D1 receptors in renal &
mesentric blood vessels —> improves renal and mesentric
perfusion.
o At moderately high doses it acts as 13, agonist → positive
ionotropic.
o At high doses it activates a-adrenoreceptors —> vasoconstriction.