Tablets containing anion exchange resin

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/36 (2006.01) A61K 9/20 (2006.01) A61K 9/32 (2006.01) A61K 31/785 (2006.01)

Patent

CA 2228472

.alpha. The present invention relates to a pharmaceutical composition comprising anion exchange. resin, silicon dioxide, crystalline cellulose, and pharmaceutically acceptable carriers and mare particularly to tablets containing anion exchange resin prepared by mixing anion exchange resin, silicon dioxide and crystalline cellulose without adding water and tabletting the mixture. More preferably, the present invention relates to said pharmaceutical composition or tablets wherein the anion exchange resin is non-crosslinked anion exchange resin represented by the formula (I): Image wherein R1 is an aralkyl group having from 7 to 10 carbon atoms or An alkyl group having from 1-20 carbon atoms; R2 and R3 are each independently the same or different and represent a lower alkyl group having from 1-4 carbon atoms; R4 is a hydrogen atom or a lower alkyl group having 1-4 carbon atoms; X is a physiologically acceptable counter ion; n is an integer of from 1 to 3; and p is an average degree of polymerization of from to 10,000. 36

L'invention se rapporte à une composition médicamenteuse comprenant une résine échangeuse d'anions, du dioxyde de silicium, de la cellulose cristalline et un excipient pharmaceutiquement acceptable, et plus particulièrement à des comprimés contenant une résine échangeuse d'anions obtenue en mélangeant un prémélange comprenant une résine échangeuse d'anions, du dioxyde de silicium et de la cellulose cristalline sans addition d'eau et en transformant en comprimés le mélange obtenu. L'invention se rapporte de préférence à la composition médicamenteuse ou aux comprimés décrits ci-dessus dans lesquels la résine échangeuse d'anions une résine de type non réticulée représentée par la formule générale (I) dans laquelle R1 représente aralkyle en C7-C10 ou alkyle en C1-C20; R2 et R3 représentent chacun, indépendamment, alkyle inférieur en C1-C4; R4 représente hydrogène ou alkyle inférieur en C1-C4; X représente un contre-ion physiologiquement acceptable; n est un nombre entier valant 1 ou 3; et p représente un degré moyen de polymérisation compris entre 10 et 10000.

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