SPL Set ID: a5b65a9b-6b8a-48a4-9c72-0e605bb309eb

Labetalol hydrochloride (HCl) is an adrenergic receptor blocking agent that has both selective alpha 1 -adrenergic and nonselective beta-adrenergic receptor blocking actions in a single substance. Labetalol 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 C 19 H 24 N 2 O 3 •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. Labetalol Hydrochloride Tablets, USP for oral administration contain 100 mg, 200 mg, or 300 mg of labetalol HCl. Each tablet also contains the following inactive ingredients: anhydrous lactose, colloidal silicon dioxide, crospovidone, hydroxypropyl methylcellulose, magnesium stearate, microcrystalline cellulose, polyethylene glycol, polysorbate 80, pregelatinized starch, purified water, and titanium dioxide. Labetalol HCl Tablets, USP 100 mg also contain synthetic red iron oxide and synthetic yellow iron oxide. Labetalol HCl Tablets, USP 300 mg also contain FD & C blue No. 2 aluminum lake. labetalol hcl structural formula