Abstract:
An oral solid dosage form containing one or several active principle(s) having analgesic properties, the composition of said dosage form being such that it prevents the misuse of said dosage form through the liquid extraction of the active principle(s) contained therein, using commonly available solvents.Said oral solid dosage form containing at least one salt of at least one analgesic active principle, and an anti-misuse system comprising at least one quenching agent, said quenching agent being suitable for inducing complexation of said analgesic active principle salt when the analgesic active principle salt is improperly extracted, notably by a drug abuser, in vitro in solution from said oral solid dosage form.
Abstract:
An aqueous suspension, stable in physiological medium, of nanoparticles for delivering active principles such as insulin. The delivery particles are based on a three-block copolymer: polyethylene glycol/hydrophilic polyaminoacid/hydrophobic polyaminoacid. These three-block copolymers can be associated with an active principle without denaturing it, and perform a controlled and long-term release of the active principle in vivo, and thus provide the active principle with a very prolonged release. Also disclosed is a powder form solid from which are derived the delivery particles, the preparation of the powder-form solid, a suspension of delivery particles based on the three-block copolymer, and pharmaceutical specialties obtainable from the delivery particles filled with active principle.
Abstract:
The invention relates to novel materials based on biodegradable polyamino acids that are useful for vectorizing active principle(s)(AP). The aim of the invention is to supply a new polymeric raw material that is used for vectorizing AP and optimally fulfills all requirements concerning biocompatibility, biodegradability, the ability to be easily associated with numerous active principles or solubilize the active principles and to release the active principles in vivo. Such polymers can also be readily and economically transformed into particles vectorizing active principles according to the grafting rate of the hydrophobic groups, said particles being able to form stable aqueous colloidal suspensions. The aim of the invention is achieved by the inventive amphiphile polyamino acids comprising aspartic and/or glutamic units that carry grafts which encompass at least one hydrophobic unit and are linked to the aspartic and/or glutamic units via a rotula containing two amide functions, more particularly via a spacer of the lysine or ornithine type. The amide functions ensure better stability during hydrolysis than comparable products known in prior art. The invention also relates to new pharmaceutical, cosmetic, dietetic, or phytosanitary compositions based on the inventive polyamino acids.
Abstract:
The invention relates to pharmaceutical compositions of acetylsalicylic acid-based microcapsules to selectively inhibit the COX in the portal vein and/or in the liver to reduce the production of thromboxane. Further, the pharmaceutical composition minimizes COX inhibition in the systemic circulation to optimize the inhibition of platelet aggregation. Certain embodiments also address methods of prevention and/or treatment of these diseases, using these oral compositions such as enhancing the safety of antithrombotic treatments. Other embodiments contemplate oral pharmaceutical compositions that combine acetylsalicylic acid with anti-platelet aggregation drugs, without inducing gastric side effects.
Abstract:
A composition in the form of an injectable aqueous solution, the pH of which is between 6.0 and 8.0, includes at least a basal insulin, the isoelectric point pI of which is between 5.8 and 8.5; and a dextran substituted by radicals carrying carboxylate charges and hydrophobic radicals. Single-dose formulations at a pH of between 7 and 7.8 includes a basal insulin whose isoelectric point is between 5.8 and 8.5 and a prandial insulin.
Abstract:
The invention relates to novel materials based on biodegradable homopolyamino acids and which can be used for the vectorization of (an) active ingredient(s) (AI). The invention also relates to novel pharmaceutical, cosmetic, dietetic or phytosanitaty compositions based on homopolyamino acids. The invention can produce a novel polymer raw material which can be used for the vectoiization of Al that can optimally be: biocompatible, biodegradable, capable of becoming easily associated with a large number of active ingredients or solubilizing them and releasing the active ingredients in vivo. According to the present invention, which primarily relates to linear homopolyamino acids having aspartic or glutamic units and whose attachments can include hydrophobic groups having 8-30 carbon atoms. The homopolymers are amphiphilic and anionic and can easily be transformed at low cost into particles for the vectorization of active ingredients. The particles can form stable aqueous colloidal suspensions.
Abstract:
The invention relates to oral pharmaceutical forms with modified release of ARB, and to related treatments and delivery methods.The invention concerns a form with modified release of ARB which prolongs the bioabsorption time and enables the pharmaceutical form to be administered only once daily.Therefore, the invention is an oral pharmaceutical form with modified ARB release comprising a plurality of ARB microunits (mean diameter: 50-1000 μm) leading, after being taken, to a plasma profile wherein C18 h*≦C18 h, with C18 h=plasma ARB concentration, 18 h after being taken, C18 h*=plasma ARB concentration corresponding to C18 h and obtained under the same conditions as C18 h, with a reference immediate-release oral pharmaceutical form*, containing the same dose of ARB, Cmax=maximum plasma ARB concentration after being taken, Cmax*=maximum plasma ARB concentration corresponding to Cmax and obtained under the same conditions as Cmax, with a reference immediate-release oral pharmaceutical form*, containing the same dose of ARB.
Abstract:
The invention concerns delivery particles (DP's) for active principles (AP's) based on linear amphiphilic polyamino-acids (PAA's), with &agr;-peptide chains, capable of being spontaneously formed by contacting PAA's with a liquid medium, preferably with water, wherein the hydrophile part of the PAA's is solubilized more than the hydrophobic parts of said PAA's, such that the latter precipitate while being organised in discrete supra-molecular arrangements, of average size ranging between 0.01 and 20 &mgr;m, capable of combining with at least an AP and releasing the latter in vivo, in prolonged and controlled manner. The inventive suspension is characterised in that the recurrent amino acids (rAA's) constituting the main chain of PAA's are identical to or different from one another and are glutamic acid and/or aspartic acid and/or their salts; and some of said rAA's bear at least one hydrophobic group, said hydrophobic group, being identical to or different from one another. The invention is useful as carriers for active principles, in particular pharmaceutical, insulin or for therapeutic uses.
Abstract:
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.
Abstract:
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.