A 12-hour anti-tussive modified release solid tablet or capsule is described which comprises a benzonatate adsorbate in a matrix with a sufficient amount of one or more pharmaceutically acceptable modified release pH-independent, substances to provide a 12-hour modified release profile to the benzonatate, wherein there is substantially no benzonatate release from the tablet or capsule in the buccal cavity and no more than about 25% release of the benzonatate within 1 hour as determined in an in vitro dissolution assay.
本发明描述了一种12小时的抗咳嗽缓释固体片剂或胶囊,其包含
苯佐卡因吸附剂在基质中,并添加了足够量的一种或多种药学上可接受的缓释pH独立物质,以提供
苯佐卡因的12小时缓释特性。其中,在口腔中基本上没有
苯佐卡因从片剂或胶囊中释放,在体外溶解试验中,1小时内
苯佐卡因的释放不超过25%。