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| - polymer; Weil et al., U.S. Pat. No. 3,469,005, teach that drugs for reducing blood pressure in mammals can be incorporated into solid vehicles such as lactose, cornstarch, microcrystalline cellulose, talc, stearic acid, magnesium stearate, gums, etc.; Merabi et al., U.S. Pat. No. 3,495,000, have found that controlled release matrices can be prepared consisting of a dialdehyde starch and ethyl cell
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