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DUAVEE® (conjugated estrogens/bazedoxifene) Description

11 DESCRIPTION

DUAVEE (conjugated estrogens/bazedoxifene), contains conjugated estrogens with bazedoxifene, an estrogen agonist/antagonist.

Conjugated estrogens are purified from pregnant mares' urine and consist of the sodium salts of water-soluble estrogen sulfates blended to represent the average composition of material derived from pregnant mares' urine. Conjugated estrogens are a mixture of sodium estrone sulfate and sodium equilin sulfate, and also contain as concomitant components, sodium sulfate conjugates, 17α-dihydroequilin, 17α-estradiol, and 17β-dihydroequilin.

Bazedoxifene is supplied as the acetate salt (bazedoxifene acetate) and has the chemical name 1H-Indol-5-ol, 1-[[4-[2-(hexahydro-1H-azepin-1-yl) ethoxy]phenyl]methyl]-2-(4-hydroxyphenyl)-3-methyl-, monoacetate. The empirical formula is C30H34N2O3 ∙ C2H4O2, and the molecular weight is 530.65.

Bazedoxifene acetate is a white to tan powder. The aqueous solubility of bazedoxifene is pH-dependent. Solubility is higher at lower pH. The solubility of bazedoxifene acetate in unbuffered sterile water was measured to be 923 microgramsA/mL at pH 5.4. The following represents the chemical structure of bazedoxifene acetate:

Chemical Structure

DUAVEE is available for oral administration as tablets containing 0.45 mg of conjugated estrogens with 20 mg of bazedoxifene (equivalent to 22.6 mg of bazedoxifene acetate). Each tablet of DUAVEE contains the following inactive ingredients: calcium phosphate tribasic, hydroxypropyl cellulose, microcrystalline cellulose, powdered cellulose, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, sucrose, ascorbic acid, sucrose palmitic acid ester, hydroxyethylcellulose, titanium dioxide, red iron oxide, yellow iron oxide, black iron oxide, povidone, polydextrose, maltitol, poloxamer 188, propylene glycol, and isopropyl alcohol.

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