Fine particles of poorly soluble drug having enteric base...

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/14 (2006.01) A61K 47/02 (2006.01) A61K 47/12 (2006.01) A61K 47/26 (2006.01) A61K 47/36 (2006.01) A61K 47/38 (2006.01)

Patent

CA 2621800

The object is to improve the elution property of a hardly-soluble substance with a poor absorption property, and to provide a microparticle of such a hardly-soluble substance which is necessary for providing a pharmaceutical preparation having an improved absorption property. Also disclosed is a process for preparation of the microparticle. A microparticle of a hardly- soluble substance which has a specific enteric base material adsorbed on the surface of the substance and has an average particle diameter of 1 to 1000 nm; a microparticle as recited above which further comprises a saccharide; and a process for preparation of the microparticle. The microparticle having an improved elution property can improve the absorption property of a hardly- soluble substance which is hardly absorbable in a human body or the like. The microparticle can be prepared with good efficiency, in a short time, and in a safe manner. It also becomes possible to provide a pharmaceutical preparation having an excellent dispersion stability.

L'objet est d'améliorer la propriété d'élution d'une substance à peine soluble avec une propriété d'absorption médiocre, et d'obtenir une microparticule d'une telle substance à peine soluble qui est nécessaire à l'obtention d'une préparation pharmaceutique ayant une propriété d'absorption améliorée. L'invention concerne également un processus d'élaboration de la microparticule. L'invention porte en outre sur une microparticule de substance à peine soluble ayant un matériau de base entérique spécifique adsorbé à la surface de la substance et d'un diamètre particulaire moyen compris entre 1 et 1000 nm ; une microparticule telle que décrite ci-dessus comprenant en outre un saccharide ; et un processus d'élaboration de la microparticule. La microparticule ayant une propriété d'élution améliorée peut renforcer la propriété d'absorption d'une substance à peine soluble qui est difficilement absorbable dans un corps humain ou similaire. La microparticule peut s'obtenir avec une bonne efficacité, en un court laps de temps, et de manière sûre. Il devient également possible de fournir une préparation pharmaceutique d'une excellente stabilité de dispersion.

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