Pharmaceutical formulation of omeprazole

A - Human Necessities – 61 – K

Patent

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Details

A61K 31/4439 (2006.01) A61K 9/16 (2006.01) A61K 9/28 (2006.01) A61K 9/50 (2006.01) A61K 31/44 (2006.01)

Patent

CA 2290531

An enteric coated oral pharmaceutical formulation comprising as active ingredient a compound selected from the group of omeprazole, an alkaline salt of omeprazole, the (-}-enantiomer of omeprazole and an alkaline salt of the (-)-enantiomer of omeprazole, wherein the formulation comprises a core material of the active ingredient and optionally an alkaline reacting compound, the active ingredient is in admixture with a pharmaceutically acceptable excipient, such as for instance a binding agent, and on said core material a separating layer and an enteric coating layer. A hydroxypropyl methylcellulose (HPMC) of low viscosity with a specific cloud point is used in the manufacture of pharmaceutical formulations. Furthermore, the application describes the processes for their preparation and the use of the claimed formulations in medicine.

L'invention concerne une formulation pharmaceutique orale à débitement entérique comprenant comme principe actif un composé sélectionné dans le groupe oméprazole, un sel alcalin d'oméprazole, le (-)-énantiomère d'oméprazole et un sel alcalin de (-)-énantiomère d'oméprazole. La formulation comprend une matière noyau du principe actif et éventuellement un composé réactionnel alcalin, le principe actif étant mélangé avec un excipient pharmaceutiquement tolérable, tel que par exemple un agent liant. Cette matière noyau est recouverte d'une couche de séparation et d'une couche à débitement entérique. Une méthylcellulose d'hydroxypropyl (HPMC) de faible viscosité avec un point de trouble spécifique est utilisée dans la production de formulations pharmaceutiques. L'invention concerne également des procédés permettant de préparer lesdites formulations et leur utilisation en médecine.

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