申请人:LEJUS MEDICAL AKTIEBOLAG
公开号:EP0148811A1
公开(公告)日:1985-07-17
The present invention relates to a new oral pharmaceutical composition having an improved release of therapeutically active compound present, in the lower part of the gastro-intestinal duct having a pH exceeding 4.5, whereby the composition comprises a core comprising a therapeutically active compound in the form of a weak base, or a weak acid, on which core there is applied a first, inner layer of a diffusion membrane in the form of ethyl cellulose, and/or a copolymer of polyethyl methacrylate-methyl methacrylate-trimethylammonium ethyl methacrylate chloride, and thereabove a second layer is applied of at least one anionic polymer and/or fatty acid having a pka of 4.5 to 7.
The invention further relates to a process for the preparation of said composition, a pharmaceutical composition containing said composition, and a method for the treatment using such a composition.
本发明涉及一种新的口服药物组合物,该组合物在胃肠道下部pH值超过4.5,其中该组合物包括一个由弱碱或弱酸形式的治疗活性化合物组成的核心,在该核心上涂敷有第一层内层扩散膜,其形式为乙基纤维素和/或聚甲基丙烯酸甲酯-甲基丙烯酸甲酯-甲基丙烯酸乙基氯酯三甲基铵的共聚物,在其上涂敷有第二层至少一种阴离子聚合物和/或pka为4.5至7的脂肪酸。
本发明还涉及一种制备上述组合物的工艺、一种含有上述组合物的药物组合物以及一种使用这种组合物进行治疗的方法。