<prompt> Which of the following beta blocker has additional vasodilator action?AtenololMetoprololPropranololCarvedilol  <response>: Carvedilol has additional vasodilatory action due to its alpha blocking propey. These are called third generation beta blockers. Third-Generation Beta-Blockers - a blockade labetalol, carvedilol, - b2 agonism celiprolol, caeolol, bopindolol, - Release of NO nebivolol, nipradilol, - Opening of K channels tilisolol - Inhibition of Ca2 channels carvedilol, bevantolol, betaxolol. 