Table 1.

Relative Receptor Potency³

Agent	Alpha-1	Beta-1	Beta-2	Dopamine	Vasopressin-1
Dobutamine	+	+++++	+++	0	0
Dopamine	+++	++++	++	+++++	0
Epinephrine	+++++	++++	+++	0	0
Milrinone	0	0	0	0	0
Norepinephrine	+++++	+++	++	0	0
Phenylephrine	+++++	0	0	0	0
Vasopressin	0	0	0	0	+++++

0 = no significant receptor affinity; + through +++++ = minimal to maximal receptor affinity