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<正>Due to frequent administration of oral nifedipine tablet, controlled or sustained release of the drug will improve patient compliance, stable blood level and side effect decrement [1,2].Various extended release nifedipine products have been commercially available. In this study, extended release tablets of this drug were formulated using sodium alginate,hydroxypropylmethylcellulose (HPMC) as controlled release matrix materials. Small scale production of 200 tablets and