Enteric coated pharmaceutical tablet and method of...

A - Human Necessities – 61 – K

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A61K 9/16 (2006.01) A61K 9/20 (2006.01) A61K 9/28 (2006.01) A61K 9/54 (2006.01) A61K 9/62 (2006.01) A61K 9/48 (2006.01)

Patent

CA 2337885

A high drug load enteric coated pharmaceutical composition is provided which includes a core in the form of a tablet and which is comprised of a medicament which is sensitive to a low pH environment of less than 3, such as ddl, and having an enteric coating formed of methacrylic acid copolymer and a plasticizer. The tablets may be of varying sized and may be orally ingested individually or a plurality of tablets sufficient to attain a desired dosage may be encapsulated in a dissolvable capsule. The tablets have excellent resistance to disintegration at pH less than 3 but have excellent drug release properties at pH greater than 4.5. A novel method of making said pharmaceutical composition is also disclosed.

Cette invention se rapporte à une composition pharmaceutique à enrobage gastro-résistant à forte charge en substance médicamenteuse, qui contient un noyau ayant la forme d'un comprimé et qui est composée d'un médicament sensible à un milieu de faible pH inférieur à 3, par exemple ddl, et comportant un enrobage gastro-résistant formé d'un copolymère d'acide méthacrylique et d'un plastifiant. Ces comprimés peuvent être de taille variable et ils peuvent être ingérés par la bouche individuellement, ou alors plusieurs comprimés, en nombre suffisant pour atteindre la dose souhaitée, peuvent être encapsulés dans une capsule soluble. Ces comprimés ont une excellente résistance à la désintégration à un pH inférieur à 3 et, en même temps, d'excellentes propriétés de libération du médicament à un pH supérieur à 4,5. Un nouveau procédé de fabrication de cette composition pharmaceutique est également présenté.

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