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Drug Information for Trandate (Prometheus Laboratories Inc.): DESCRIPTION
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TRANDATE Injection is an adrenergic receptor blocking agent that has both selective alpha1-adrenergic and nonselective beta-adrenergic receptor blocking actions in a single substance.
Labetalol hydrochloride (HCl) is a racemate chemically designated as 2-hydroxy-5-[1-hydroxy-2-[(1-methyl-3-phenylpropyl) amino]ethyl]benzamide monohydrochloride, and it has the following structure:
Labetalol HCl has the empirical formula C19H24N2O3•HCl and a molecular weight of 364.9. It has two asymmetric centers and therefore exists as a molecular complex of two diastereoisomeric pairs. Dilevalol, the R,R' stereoisomer, makes up 25% of racemic labetalol.
Labetalol HCl is a white or off-white crystalline powder, soluble in water. TRANDATE Injection is a clear, colorless to light yellow, aqueous, sterile, isotonic solution for intravenous (IV) injection. It has a pH range of 3 to 4. Each milliliter contains 5 mg of labetalol HCl, 45 mg of anhydrous dextrose, 0.1 mg of edetate disodium; 0.8 mg of methylparaben and 0.1 mg of propylparaben as preservatives; and citric acid anhydrous and sodium hydroxide, as necessary, to bring the solution into the pH range.
- Drug Information Provided by National Library of Medicine (NLM).