Comparative Study of Intravenous Labetalol Versus Intravenous Nitroglycerin Versus Sublingual Nifedipine

it contains both selective, competitive, alpha1-adrenergic antagonism and non-selective, competitive, beta-adrenergic (B1 and B2) blocking activity in a single agent

a nitric oxide donor with low oral bioavailability and a very short half-life, has a potent venodilator effect in low doses and affects arterial tone at high doses

dihydropyridine calcium channel blocker. Its main uses are as an antianginal and antihypertensive