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(alendronate sodium) Effervescent Tablets


BINOSTO (alendronate sodium) is a bisphosphonate that acts as a specific inhibitor of osteoclastmediated bone resorption. Bisphosphonates are synthetic analogs of pyrophosphate that bind to the hydroxyapatite found in bone.

Alendronate sodium is chemically described as (4 amino-1-hydroxybutylidene) bisphosphonic acid, monosodium salt, trihydrate. The molecular formula of alendronate sodium is C4H12NNaO7P2• 3H2O and its molecular weight is 325.12. The structural formula of alendronate sodium is

BINOSTO (alendronate sodium) Structural Formula Illustration

Alendronate sodium is a white or almost white crystalline powder that is soluble in water, very slightly soluble in methanol, and practically insoluble in methylene chloride.

BINOSTO for oral administration is an effervescent tablet formulation that must be dissolved in water before use. Each individual tablet contains 91.37 mg of alendronate sodium, which is equivalent to 70 mg of free alendronic acid. Each tablet also contains the following inactive ingredients: monosodium citrate anhydrous, citric acid anhydrous, sodium hydrogen carbonate, and sodium carbonate anhydrous as buffering agents, strawberry flavor, acesulfame potassium, and sucralose.

Once the effervescent tablet is dissolved in water, the alendronate sodium is present in a citratebuffered solution.

Last reviewed on RxList: 12/5/2016
This monograph has been modified to include the generic and brand name in many instances.

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