Inclusion complexes containing piroxicam, a cyclodextrin and...

A - Human Necessities – 61 – K

Patent

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A61K 47/48 (2006.01)

Patent

CA 2563101

The invention relates to a method for preparing a soluble inclusion complex comprising one or several active substances which are hardly soluble in an aqueous medium and are included in one or several host molecules, characterised in that it comprises the following successive stages: (a) one or several active substances are brought into contact with one or several host molecules; (b) initiation of a molecular diffusion stage by bringing a dense pressurized fluid into contact with the mixture obtained in stage (a) in a static mode in the presence of one or several diffusing agents; (c) recovery of the active substance- host molecule molecular complex thus formed; (d) initiation of a stage wherein an interaction agent is added to and mixed with the active substance host molecule molecular complex; (e) recovery of the soluble inclusion compound thus formed. The invention also relates to the soluble inclusion compound which can be obtained by said method, particularly a piroxicam-cyclodextrin-arginine compound.

La présente invention concerne un procédé de préparation d'un composé d'inclusion soluble comprenant une ou plusieurs substances actives peu soluble dans un milieu aqueux incluses dans une ou plusieurs molécules hôtes, caractérisé en ce qu'il comprend les étapes successives suivantes: (a) mise en contact d'une ou plusieurs substances actives avec une ou plusieurs molécules hôtes, (b) mise en couvre d'une étape de diffusion moléculaire par mise en contact, en mode statique, d'un fluide dense sous pression avec le mélange obtenu à l'étape (a) en présence d'un ou plusieurs agents de diffusion, (c) récupération du complexe moléculaire substance active - molécule hôte ainsi formé, (d) mise en couvre d'une étape qui consiste à ajouter et mélanger un agent d'interaction avec le complexe au complexe moléculaire substance active - molécules hôtes, (e) récupération du composé d'inclusion soluble ainsi formé. Elle concerne également le composé d'inclusion soluble susceptible d'être obtenu par ce procédé, en particulier un complexe piroxicam-cyclodextrine- arginine.

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