Most potent cardiac stimulant among the following is?: (A) Adrenaline, (B) Noradrenaline, (C) Ephedrine, (D) Salbutamol
Answer is A. Epinephrine (adrenaline) is an agonist at both a and b receptors. It is, therefore, a very potent vasoconstrictor and cardiac stimulant. Noradrenaline acts mainly on alpha receptors salbutamol acts on beta 2 receptors beta 1 receptors are located on hea Katzung 12e pg:140