摘要:
The present invention relates to a composition comprising at least one active ingredient with low aqueous solubility, said active ingredient being present therein in a form noncovalently associated with nanoparticles formed by at least one POM polymer of formula (I), and in which said active ingredient is present in a proportion of at least 5 μmol/g of POM.It is also directed towards the use of such nanoparticles, noncovalently associated with an active ingredient, with a view to increasing the aqueous solubilization of said active ingredient.
摘要:
The invention relates to liquid pharmaceutical formulations for oral administration with the modified release of active principle(s), excluding amoxicillin, said formulations consisting of suspensions of coated particles of active principles (microcapsules). According to the invention, the microcapsules constituting the disperse phase of the suspension are designed to allow the modified release of the active principle(s) according to a profile that does not change during the storage of the liquid suspension. To do this the inventors propose the selection of a specific coating composition for the microcapsules which consists of at least four components that allow these microcapsules to be stored in water without modifying their properties of modified release of the active principle, this liquid phase furthermore being saturated with active principle(s).
摘要:
The present invention relates to a novel solid composition, useful for treating hepatitis, in particular hepatitis C, comprising at least one interferon alpha and at least one grafted poly(glutamic acid) having an average molar mass ranging from 26,000 to 40,000 g/mol, preferably approximately 33,000 g/mol and carrying grafts of alpha-tocopherol at an average molar grafting rate ranging from 4.5 to 5.5%, preferably approximately 5%, the interferon alpha and said grafted poly(glutamic acid) being present in a grafted poly(glutamic acid)/interferon alpha weight ratio ranging from 21 to 125.It also relates to the use of such a solid composition for the preparation of a liquid composition by the addition of an aqueous liquid.
摘要:
The invention relates to a microparticulate system for the delayed and controlled release of active principles (AP) whose absorption window in vivo is essentially limited to the upper parts of the gastrointestinal tract, this system being intended for oral administration. The object of the invention is to provide a system ensuring that the AP is released with certainty by means of a dual mechanism of “time-dependent” and “pH-dependent” release. To achieve this object, the invention proposes a multimicrocapsular oral galenical form which is designed so as to guarantee therapeutic efficacy, and in which the release of the AP is governed by a dual release triggering mechanism that is “time-triggering” and “pH-triggering”. This system comprises of microcapsules (200 to 600 μm) comprising a core of AP coated with a film (maximum 40% by weight) comprising a hydrophilic polymer A (Eudragit® L) and a hydrophobic compound B (vegetable wax, melting point=40-90° C.), B/A being between 0.2 and 1.5. These microcapsules have a dissolution behavior in vitro such that, at a constant pH of 1.4, a latency phase of between 1 and 5 hours is observed, followed by a release of the AP, and such that the change from pH 1.4 to pH 6.8 results in a release of the AP without a latency period in vitro.
摘要:
The invention concerns liquid pharmaceutical formulations, for oral delivery, with modified release of active principle(s) excluding amoxicillin and consisting of suspensions of coated particles of active principles (microcapsules). The microcapsules constituting the dispersed phase of the suspension are designed, according to the invention, to enable modified release of the active principle(s), in accordance with a profile which remains unaltered during the shelf life of the liquid suspension. Therefor, the invention consists in selecting a coating composition specific to the microcapsules consisting of at least four components enabling preservation of said microcapsules in water without altering their properties of modified release of the active principle, said liquid phase being furthermore saturated with active principle(s).
摘要:
The invention concerns a galenic system with prolonged/controlled release of the medicinal and/or nutritional active principle, for oral administration. The aim is to provide a system enabling to obtain with one single tolerable and acceptable dose of active principle, efficient therapeutic protection over 24 hours (increasing the bioabsorption time without affecting bioavailability). To achieve this, the invention provides a composition comprising two controlled release systems associated in series, namely: individualised coated particles (microcapsules) of active principle forming an internal phase, the coating comprising a film-forming polymer P1 (ethylcellulose), a nitrogenous polymer (polyvinylpyrrolidone), a softener (castor oil) and a lubricant (magnesium stearate), and an external phase of functional carriers: polyelectrolytic hydrophilic polymer: (alginate), neutral hydrophilic polymer (hydroxypropylmethylcellulose) and a gelling additive (calcium acetate), said composition spontaneously forming in the presence of water, a cohesive and stable composite macroscopic solid, wherein the external continuous phase is a gelled matrix including the active principle microcapsules. The invention is useful for delayed oral galenic formulation of metformin.
摘要:
The present invention relates to a composition comprising at least one active ingredient with low aqueous solubility, said active ingredient being present therein in a form noncovalently associated with nanoparticles formed by at least one POM polymer of formula (I), and in which said active ingredient is present in a proportion of at least 5 μmol/g of POM.It is also directed towards the use of such nanoparticles, noncovalently associated with an active ingredient, with a view to increasing the aqueous solubilization of said active ingredient.
摘要:
The invention relates to oral medicaments having a modified release of proton pump inhibitors (PPI's) that are, in particular, useful in preventing and treating gastrointestinal disorders. The aim of the invention is to provide a novel oral medicament based on PPI's ideally having all or some of the following characteristics: a) quickly providing relief to the patient by increasing the gastric pH after oral administration of the medicament; b) accelerating the recovery of patients while maintaining this increase in the gastric pH for as long as possible after oral administration of the medicament and, in particular, during the night; c) improving the observance of the treatment and the comfort of the patient by taking the medicament once daily. To this end, the microcapsules of the invention, preferably non-enteric, are constituted of PPI microparticles coated with ethyl cellulose, an ammonio methacrylate copolymer (Eudragit® RL 100), polyvinylpyrrolidone, castor oil and polyoxyethylenated hydrogenated castor oil (40). This medicament is designed so that after its ingestion for a once daily administration, it makes it possible to maintain, from the first day of treatment onward, an average gastric pH, between 0 and 24 h, of greater than or equal to the average gastric pH between 0 and 24 h obtained by an enteric oral medicament having a reference* immediate release, administered under the same conditions. The invention also relates to these microcapsules per se.
摘要:
The invention relates to liquid pharmaceutical formulations for oral administration with the modified release of active principle(s), excluding amoxicillin, said formulations consisting of suspensions of coated particles of active principles (microcapsules). According to the invention, the microcapsules constituting the disperse phase of the suspension are designed to allow the modified release of the active principle(s) according to a profile that does not change during the storage of the liquid suspension. To do this the inventors propose the selection of a specific coating composition for the microcapsules which consists of at least four components that allow these microcapsules to be stored in water without modifying their properties of modified release of the active principle, this liquid phase furthermore being saturated with active principle(s).
摘要:
The invention concerns microcapsules with prolonged release of active principles with low solubility, consisting of a core containing the active principle and coated with a polymer layer which controls the release of the active principle. The aim is that said oral microcapsules containing hardly soluble active principles, should have a coating film of sufficient thickness to ensure controlled permeability and should be adapted to industrial reproduction. This is achieved by the inventive microcapsules of mean diameter less than 1000 microns, and whereof the coating film contains a film-forming polymer (P1) insoluble in gastrointestinal tract fluids, a water-soluble polymer (P2), a plasticizer (PL), and optionally a lubricating surfactant (TA). Said microcapsules are characterized in that their coating films represents at least 3% p/p of dry matter, relative to their total weight and their core contains a hardly soluble active principle and a solubilizing agent (polyoxyethylene hydrogenated castor oil) which provides the core wherein it is contained with properties such that the behavior of the exposed core (non-coated) in a given dissolving test (TD), is as follows: release of 80% of active principle in less than two hours. The invention also concerns the use of such microcapsules in galenic formulation.