Pharmaceutical formulations for the controlled release of...

A - Human Necessities – 61 – K

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A61K 9/22 (2006.01) A61K 9/00 (2006.01) A61K 9/20 (2006.01) A61K 9/50 (2006.01) A61K 9/52 (2006.01) A61K 31/517 (2006.01) A61P 13/08 (2006.01)

Patent

CA 2461168

The invention provides a controlled-release pharmaceutical formulation for oral administration comprising 4-amino-6,7-dimethoxy-2-(5-methanesulfonamido- 1,2,3,4-tetrahydroisoquinol-2-yl)-5-(2-pyridyl)quinazoline, or a pharmaceutically acceptable salt thereof; and a pharmaceutically acceptable adjuvant, diluent or carrier; characterized in that the formulation is adapted to release at least 50% by weight of the 4-amino-6,7-dimethoxy-2-(5- methanesulfonamido-1,2,3,4-tetrahydroisoquinol-2-yl)-5-(2-pyridyl)- quinazoline, or the pharmaceutically acceptable salt thereof, after 6 hours in Apparatus 1 described in the United States Pharmacopoeia 24 (2000), pp 1941- 1943, having 1 litre vessels, baskets of 40 mesh (0.4 mm apertures), a rotation speed of 100 rpm, and a dissolution medium consisting of 900 ml of 0.01 M hydrochloric acid containing 0.7% w/v sodium chloride at 37 ~C. Formulations according to the invention are suitable for the treatment of BPH.

La présente invention concerne une formulation pharmaceutique à libération contrôlée destinée à l'administration orale, qui comprend une 4-amino-6,7-diméthoxy-2-(5-méthanesulfonamido-1,2,3,4-tétrahydroisoquinol-2-yl)-5-(2-pyridyl) quinazoline, ou un sel pharmaceutiquement acceptable de cette dernière, et un adjuvant, diluant ou excipient pharmaceutiquement acceptable; caractérisée en ce que la formulation est apte à libérer au moins 50 % en poids de la 4-amino-6,7-diméthoxy-2-(5-méthanesulfonamido-1,2,3,4-tétrahydroisoquinol-2-yl)-5-(2-pyridyl)-quinazoline, ou du sel pharmaceutiquement acceptable de cette dernière, après 6 heures dans l'appareil 1 décrit dans la pharmacopée 24 (2000) des Etats-Unis, pp. 1941-1943, qui comprend des cuves de 1 litre, des paniers de 40 mailles (ouvertures de 0,4 mm), une vitesse de rotation de 100 tours-minute, et un milieu de dissolution composé de 900 ml d'acide chlorhydrique 0,01M contenant 0,7 % poids/volume de chlorure de sodium à 37 ·C. L'invention se rapporte également à des formulations selon l'invention aptes au traitement de l'hypertrophie bénigne de la prostate.

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