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Labetalol is a beta blocker, or an antagonist of the β-adrenergic receptors. It is specifically a non-selective antagonist of the β 1-and β 2-adrenergic receptors. [17] Labetalol has intrinsic sympathomimetic activity. [17] It is also an antagonist of the α 1-adrenergic receptor, and hence is additionally an alpha blocker.
The choice between the drugs is to a large degree determined by the characteristics of the patient being prescribed for, the drugs' side effects, and cost. Most drugs have other uses; sometimes the presence of other symptoms can warrant the use of one particular antihypertensive. Examples include: Age can affect the choice of medications.
More lipophilic beta-blockers are known to suppress melatonin release by 50-80%. [77] [78] [79] The preceding beta blockers also vary in their intrinsic sympathomimetic activity and β 1-adrenergic receptor selectivity (or cardioselectivity), resulting in further differences in pharmacological profiles and suitability in different contexts ...
The progress in β-blocker development led to the introduction of drugs with variety of properties. β-blockers were developed having a relative selectivity for cardiac β1-receptors (for example metoprolol and atenolol), partial adrenergic agonist activity , concomitant α-adrenergic blocking activity (for example labetalol and carvedilol) and ...
Metoprolol, sold under the brand name Lopressor among others, is a medication used to treat angina, high blood pressure and a number of conditions involving an abnormally fast heart rate. [4] It is also used to prevent further heart problems after myocardial infarction and to prevent headaches in those with migraines . [ 4 ]
Higher selectivity is associated with less off-target binding, which is binding between drug molecules and receptors other than target receptors. [6] Therefore, non-selective adrenergic blockers can cause various adverse effects as they can also exert actions on non-target receptors, such as non-selective alpha blockers and beta blockers.
The doctors and nurses didn’t believe Tomisa Starr was having trouble breathing. Two years ago, Starr, 61, of Sacramento, California, was in the hospital for a spike in her blood pressure.
Labetalol (has additional α-blocking activity) Nadolol; Penbutolol (has intrinsic sympathomimetic activity) Pindolol (has intrinsic sympathomimetic activity) Propranolol; Sotalol; Timolol; β 1-selective agents Acebutolol (has intrinsic sympathomimetic activity) Atenolol; Betaxolol; Bisoprolol; Celiprolol; Esmolol; Metoprolol; Nebivolol; β 2 ...