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Dipyridamole Tablets, USP are indicated as an adjunct to coumarin anticoagulants in the prevention of postoperative thromboembolic complications of cardiac valve replacement.
Dipyridamole, USP is a platelet inhibitor chemically described as 2,2′,2”,2”’-[(4,8-Dipiperidinopyrimido[5,4-d]pyrimidine-2,6-diyl)dinitrilo]-tetraethanol. It has the following structural formula:

Dipyridamole is an odorless yellow crystalline powder, having a bitter taste. It is soluble in dilute acids, methanol and chloroform, and practically insoluble in water.
Dipyridamole Tablets USP, 25 mg, 50 mg and 75 mg for oral administration contain 25 mg, 50 mg, and 75 mg of dipyridamole, USP, respectively.
Inactive ingredients for Dipyridamole Tablets USP, 25 mg, 50 mg, and 75 mg: microcrystalline cellulose, povidone, crospovidone, lactose monohydrate, colloidal silicon dioxide, magnesium stearate, FD&C Red # 40 aluminum lake, FD&C Yellow #6 aluminum lake, lecithin, polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide.