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Price of Labetalol
Normodyne 200 mg tablet
* price without discount in nearest pharmacy. Price may vary.
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Labetalol volume of distribution
What is Labetalol
Blocker of both alpha- and beta-adrenergic receptors that is used as an antihypertensive. (PubChem)
Labetalol mechanism of action
Labetalol HCl combines both selective, competitive, alpha-1-adrenergic blocking and nonselective, competitive, beta-adrenergic blocking activity in a single substance. In man, the ratios of alpha- to beta- blockade have been estimated to be approximately 1:3 and 1:7 following oral and intravenous (IV) administration, respectively. The principal physiologic action of labetalol is to competitively block adrenergic stimulation of -receptors within the myocardium (1-receptors) and within bronchial and vascular smooth muscle (2-receptors), and 1-receptors within vascular smooth muscle. This causes a decrease in systemic arterial blood pressure and systemic vascular resistance without a substantial reduction in resting heart rate, cardiac output, or stroke volume, apparently because of its combined – and -adrenergic blocking activity.
Dosage forms of Labetalol
|Injection, solution||intravenous||5 mg/mL|
Humans and other mammals
Indication of Labetalol
For the management of hypertension (alone or in combination with other classes of antihypertensive agents), as well as chronic stable angina pectoris and sympathetic overactivity syndrome associated with severe tetanus. Labetalol is used parenterally for immediate reduction in blood pressure in severe hypertension or in hypertensive crises when considered an emergency, for the control of blood pressure in patients with pheochromocytoma and pregnant women with preeclampsia, and to produce controlled hypotension during anesthesia to reduce bleeding resulting from surgical procedures.
Toxicity of Labetalol
LD sub50 /sub = 66 mg/kg (Rat, IV). Side effects or adverse reactions include dizziness when standing up, very low blood pressure, severely slow heartbeat, weakness, diminished sexual function, fatigue
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