USRE39104E1 - Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions - Google Patents

Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions Download PDF

Info

Publication number
USRE39104E1
USRE39104E1 US10/190,499 US19049902A USRE39104E US RE39104 E1 USRE39104 E1 US RE39104E1 US 19049902 A US19049902 A US 19049902A US RE39104 E USRE39104 E US RE39104E
Authority
US
United States
Prior art keywords
progesterone
therapeutic agent
dissolution
active agent
estradiol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US10/190,499
Inventor
Roselyne Duclos
Didier Terracol
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laboratoires Effik
Original Assignee
Laboratoires Effik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Laboratoires Effik filed Critical Laboratoires Effik
Priority to US10/190,499 priority Critical patent/USRE39104E1/en
Application granted granted Critical
Publication of USRE39104E1 publication Critical patent/USRE39104E1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/141—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers
    • A61K9/146—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with organic macromolecular compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/141—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers
    • A61K9/145—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with organic compounds

Definitions

  • micronization which suitably increases the external specific surface of a powdery product yet constitutes an approach to the problem, is only convenient for some pharmaceutical forms, such as suspensions or soft gelatin capsules. It cannot be a general solution to this problem.
  • the adjunction of surfactants can increase the solubility of active components and thereby, improve the kinetics of resorption, but cannot necessarily allow obtaining higher blood levels.
  • the vitreous state though it is a solid state, draws near to a liquid state for its structural disorder. It is a little orderly state, easy to break and which improves substantially the rate of dissolution for less soluble components. Nevertheless, despite the great number of publications relating to the production of solid dispersions, especially for Macrogols or Poloxamers, this technique has not known any important development because of its lack of generality. In some cases, the rate of dissolution is great. In other cases, the rate of dissolution is weaker and makes one's way toward an asymptotic value.
  • the novel process of the invention for the production of a solid dispersion of at least one therapeutic agent in a hydrophilic carrier having enhanced solubility in an aqueous media comprises dissolving at least one therapeutic agent in a volatile organic solvent containing a very hydrophilic polymer and evaporating the solvent to dryness to form a co-precipitate of therapeutic agent and hydrophilic polymer.
  • the dissolution rate will be increased still more when the organic solvent also contained a surface-active agent which further improves the wetability of the active ingredient and optionally limits the phenomenon of growth of crystals which operates during the conservation of solid dispersions and leads to a decrease of the kinetics of dissolution as a function of time.
  • the solid dispersions are systems in which one or several active ingredients are dispersed in the solid state (microparticular, even molecular) in an inert solid vehicle (Chiou et al). These solid dispersions have to be made distinct from mere mixture of powders designated under the name of physical mixture.
  • Two methods are currently used for the preparation of solid dispersions: the method of melting/solidification which leads to the formation of co-melted—and the method of dissolution/evaporation which leads to the formation of co-precipitates.
  • a mixed method resulting from the combination of both preceding methods, is sometimes cited but appears to be seldom utilized.
  • the process of the invention utilizes the formation of co-precipitates by means of dissolution—evaporation.
  • the very hydrophilic polymer dissolved in the organic solvent preferably is a polyvinylpyrrolidone having a molecular weight ranging from 10,000 to 5,000, a (N-methylpyrrolidone) or a N-methylpiperidone-2). These selected cyclic lactams are very soluble in water and produce co-precipitates which are easily and wholly soluble in water.
  • the organic solvent usually is a solvent which both dissolves the very hydrophilic polymer and the active ingredient while having a sufficiently high degree of volatility to be in a position to be after dissolution of the mixture, evaporated off without having recourse to—very strong, physical means—such as heat or vacuum.
  • solvents are for example oxygenated solvents such as ethanol, isopropanol, tetrahydrofuran, isopropyl ether, acetone, methy ethyl ketone, tetrahydropyran, or chlorinated solvents such as methylene chloride or even mixtures in various proportions of these same solvents.
  • the optionally added surface-active agent preferably is a non-ionic surface active agent selected from the polyoxyethylenic esters of sorbitan and saturated or unsaturated fatty acids having at least 8 carbon atoms; polyoxyethylenic ethers of fatty alcohols of at least 8 carbon atoms and the polyoxyethylenic esters of stearic acid.
  • the non-ionic tensio-active agent is selected from among those having an amphiphilic character but with a hydrophilic predominancy, having a HLB>12, such as the polyoxyethylenic esters of sorbitan and fatty acids such as Tweens 20 to 80, the polyoxyethylenic ethers of fatty alcohols such as the Brijs 56, 58, 78, 96, 97, 98, 99; G 3816 and 3820, G 3910 and 3920 or Ethylan D254 to 257 or Renex or Cremophor as well as those of Pluronic type (block-Copolymers of ethylene oxide and propylene oxide such as Pluronics F 68 and F 87 or Poloxamer 188).
  • Pluronic type block-Copolymers of ethylene oxide and propylene oxide such as Pluronics F 68 and F 87 or Poloxamer 188.
  • the content of active ingredients in the pharmaceutical composition of this invention is of the same order of magnitude as with the usual pharmaceutical composition.
  • progesterone and its derivatives A more significant attention has to be paid to the compounds which are little or not resorbed in the intestines such as progesterone and its derivatives. It is preferred that the substitution in 17 ⁇ is needed in order that the progesteronic agents are active orally (cyproterone acetate, demegestone, promegestone, norethynodiol diacetate, medroxyprogesterone acetate . . . ) but this substitution has an effect to induce at the same time, noxious side-effects (androgenic or anti-androgenic action, estrogenic action . . . ) which are not at all desired. It appears highly desirable to use native progesterone or a derivative of progesterone such as dihydroesterone, 17 ⁇ -hydroxyprogesterone for example, which does not bear any supplemental substituent in position 17 ⁇ .
  • co-precipitates containing from 10 to 60% by weight of active ingredient.
  • the amount of surface active agent ranges from 0.5 to 20% related to the whole mass.
  • the preferred content ranges from 15 to 35% for the progesteronic derivative and from 1 to 10% of surface-active related to the whole mass.
  • Co-precipitates of progesteronic derivatives are obtained which dissolve practically in an integral manner in water or in an aqueous medium in 10 to 20 minutes under stirring, depending on the content of progesteronic derivative.
  • the resulting pulverulent product can be diluted with carriers or pharmaceutical vehicles or be subjected to a coating by fluidized bed.
  • the achieved pharmaceutical forms can be packed in the form of tablets, sugar-coated pills, pills, soft gelatin capsules or sachets according to the usual technics of the industrial galenics. It is also possible to form by coating in a fluidized bed a granule which can be broken, screened and compressed or kept intact, and which can be divided in tight sachets ready for administration.
  • FIGS. 1 and 2 are graphs showing the dissolution in water of 200 grams of powder per liter.
  • FIGS. 3 and 4 are the percentage of dissolution of the compositions in water.
  • the performed tests have thus had as an aim to improve the kinetics of dissolution of an active ingredient such as progesterone to improve the bioavailability of this hormone after oral administration.
  • a number of solid dispersions have been prepared by the method of melting/solidification and or by the method of dissolution/evaporation using five hydrophilic excipients: saccharose distearate, polyoxyethyleneglycol 4000, polyvinyl pyrrolidone, citric acid, and phospholipids.
  • the thus-finalized techniques have allowed to obtain, in a reproducible manner, products showing a clear improvement in the dissolution of progesterone.
  • the co-precipitates with 30 to 50% w/w of polysorbate 80 in PVP show good galenical characteristics.
  • the rates of dissolution of the hormone after storage are superposable to those obtained with a freshly prepared product on one side, and provide, on the other side, a rate of dissolution higher than 95% in less than 10 minutes.
  • Another advantage of the process of this invention resides in the fact that the co-precipitates contain a high content of active ingredient and from that, it may be possible to achieve pharmaceutical formulations which are less voluminous and more particularly, soft gelatin capsules of small size.
  • the thus-obtained samples were kept for 48 hours in an exsiccator before being ground and sieved to a grain size ⁇ 100 pm.
  • co-precipitates were prepared by the above process and then provided the most complete guaranties relating to stability.
  • the following examples which relate to the more particular case of progesterone are only given as a way of illustration without limiting it in any manner.
  • the device for measuring utilized for the galenic control of the solid dispersions consisted of three members:-an apparatus for dissolution Dissolutest PT 6 from Erweka-a peristaltic pump 502 SR from Watson Marlow and-a spectrophotometer coupled with an automatic apparatus for dissolution, from SAFAS.
  • Each test of dissolution was carried out in one liter of degassed water at 37° C. and a pH close to neutral.
  • a sample weighing about 5 mg of progesterone (i.e. 25 mg of co-melting or co-precipitate) was introduced into each of the six reactors at time TO with a speed of stirring of the paddles of 100 rpm.
  • the dosing through UV absorption at 250 nm was performed continuously, and in closed circuit using a multi-channel peristaltic pump connecting the beakers of the Dissolutest apparatus, to the dishes of the spectrophotometer.
  • the latter was linked to a recorder and to a printing machine to permit the measurement at constant intervals of every 3 minutes of the variations of the optical density, themselves being proportional to the variations of concentration of the active ingredient in the medium of dissolution.
  • PROGESTERONE-PVP co-precipitates Time after manufacture with polysorbate 80 (minutes) 20% 30% 50% 0 0 0 0 3 22.38 36.82 44.91 6 37.93 51.90 60.10 9 46.42 61.50 69.70 12 54.12 67.22 74.40 15 58.65 71.98 78.90 18 62.38 76.36 83.50 21 65.15 80.47 89.84 24 68.49 81.66 93.96 27 70.63 83.04 95.55 30 72.38 84.52 96.79 33 74.28 86.31 98.25 36 75.39 87.49 98.49 39 77.14 88.49 100 42 78.65 89.12 100 45 80.23 90.71 100 48 81.57 91.76 100 51 82.38 92.58 100 54 82.93 92.93 100 57 83.88 93.17 100 60 85.15
  • PROGESTERONE-PVP co-precipitates Time after 6 months storage at 4° C. (minutes) 20% 30% 50% 0 0 0 0 3 78.87 32.22 8.01 6 86.80 42.77 15 9 89.10 48.65 20.79 12 91 52.30 25.39 15 92.90 56.26 29.76 18 94.60 58.49 33.33 21 96 60.71 37.14 24 97.80 63.17 40.24 27 98.80 65.28 42.93 30 100 68.41 46.03 33 100 70.23 47.93 36 100 71.82 51.11 39 100 73.96 52.14 42 100 75.07 54.20 45 100 78.88 56.35 48 100 79.93 57.62 51 100 80.95 59.84 54 100 82.06 60.95 57 100 83.09 62.54 60 100 83.80 64.20
  • the used raw materials were estradiol as the hemihydrate, art.680025 batch 24056446 from Schering AG (Berlin, Germany), polyvinylpyrrolidone (Kollidon 30 no. 56.0902 from BASF AG 67056 Ludwigshafen Germany). Tween 80 (polyoxyethylene sorbitan mono oleate AB 397). (ICI Chemicals, Niedermik der yer ICI GMBH Goldschmidtstr. 100 D 4300 Essen 1) and Absolute ethanol (no. EEC 603.002.00.5) from Distillery Hauguel 76700 Gonfreville l'Orcher (F).
  • the apparatus to be used for the production of the solid dispersions were an electronic weighing machine A 120 Sartorius from OSI 141 rue de Javel 75015 Paris and a rotative evaporator RE Büchi, from Roucaire 20 avenue de l'Europe 78143 Velizy (F).
  • the temperature of the water bath was 60° C. and the speed of rotation of the flask was 100 rounds/minute.
  • the recovered samples were placed in an exsiccator for 47 hours and then were ground and screened.
  • the galenical tests were performed on samples having granulometry lower than 100 micrometers.
  • the system of measurements used for the galenical control of the solid dispersions was made of two members: an apparatus of dissolution DISSOLUTEST DT 6 from ERWEKA
  • Each test of dissolution was performed in one liter of degassed distilled water at 37° C. and at a pH near neutral.
  • the dosages by UV were performed continuously and in a closed circuit of a multi-channel peristaltic pump, connecting the beakers of the Dissolutest to the dishes of the spectrophometer.
  • the latter was linked to a recorder and to a printing machine to permit the measurement at steady intervals of every 3 minutes of the variations of the optical density, themselves being proportional to the variations of the concentration of the active ingredient in the dissolution medium.
  • the used raw materials were the same as those used in the case of estradiol (chapter IV) to which progesterone was added (USP and EP batch 347 JA) from Upjohn Company Fine Chemical Division, Kalamazoo, Mich. 40991 (USA).
  • the apparatus was also the same than that used in the case of estradiol.
  • the performed co-precipitates had the following composition: 2.5 g of progesterone, 0.05 g of estradiol, 2.2 g of PVP and 0.25 g i.e. 50 ml of a solution at 5 g/l of Tween 80 in absolute ethanol. 103 ml of absolute ethanol were needed for the complete dissolution of the various components (50 ml absolute ethanol for 1 g of progesterone, 10 ml for 1 g of estradiol).
  • the temperature of the water bath was 60° C.
  • Test 1 200 mg powder for 1 liter water
  • FIG. 1 (test of dissolution in water of 200 mg of powder per liter)
  • FIG. 2 (test of dissolution in water of 20 mg of powder per liter)
  • FIG. 3 (test of dissolution in water of 200 mg of powder per liter)
  • FIG. 4 determination of the percentage of progesterone dissolved in water starting of 20 mg of powder per liter of water.
  • Fenofibrate (batch F 0092 ⁇ 100) from Schweizerhalt France-Deshors 17 Bd de Montmorency 75016 Paris, polyvinylpyrrolidone (Kollidon 30 - Nr 56 - 0902) from BASF AG 67056 Ludwigshafen Germany, Tween 80 (polyoxyethylene sorbitan monooleate) batch AB 397 (ICI Chemicals, Niedermik der yer ICI GMBH, Goldschmidstr 100 D-4300 Essen 1) and absolute ethanol from Distillery Hauguel 76700 Gonfreville l'Orcher (F).
  • the temperature of the water bath was 60° C. and the speed of rotation of the flask was 100 rounds per minute.
  • the duration of the evaporation was adapted, depending on the amount of absolute ethanol added for dissolving the products and then as a function of the series of the co-precipitates.
  • the Samples with 2.5 g of fenofibrate had a yellowish appearance and formed a pellet more or less viscous, after one hour of evaporation at the minimal pressure.
  • the maximal solubility of fenofibrate in water had been previously determined which was less than 3 mg/l.
  • the co-precipitates produced above respectively contained 50%, 40%, 30%, 20% and 10% by weight of fenofibrate.
  • an amount of fenofibrate which allowed the total solubilization in 1 liter of water he would need to weigh respectively 6 mg, 7.5 mg, 10 mg, 15 mg and 30 mg of co-precipitates. This accuracy in this measurement which was due to minute but unavoidable losses due to handling, cannot be achieved.
  • UV Spectro-photometry was wholly responsible for the decrease of the kinetics of dissolution.
  • the amount of Medroxy progesterone acetate in each series was 0.5 g and that of polyvinylpyrrolidone ranged from 2 to 5 g.
  • the solid dispersions were prepared according to the method described in example IV.
  • the percentage of dissolved compound was about complete in 30 minutes at room temperature.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Epidemiology (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medicinal Preparation (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

A process for the production of a solid dispersion of at least one therapeutic agent in a hydrophilic carrier having enhanced solubility in an aqueous media comprising dissolving at least one therapeutic agent in a volatile organic solvent containing a very hydrophilic polymer and evaporating the solvent to dryness to form a co-precipitate of therapeutic agent and hydrophilic polymer and the resulting products and their therapeutic method of use.

Description

It has been known for several years that by the side of classic exploration of the pharmacological and toxicological properties of the drugs, one takes care more and more on the quantitative aspect of the resorption of the active component. The kinetics become more and more the object of systematic studies because the intensity of the response and sometimes the nature thereof, are a function of the concentration obtained at the level of the site of action. The significance of these studies on pharmacokinetics and bio-availability have shown the interest of the modifications brought during the preparation of the galenic forms, mainly for the ones adapted for administration by the digestive tract.
Drugs with poor solubility in water or hardly salifiable during the passage in the stomach are only partially resorbed. The prior literature has shown that the digestive resorption might be modified in a favorable way by the study of the particle size, by the adjunction of non-ionic surfactants as well as by the adjunction of a solubilizing agent.
The micronization which suitably increases the external specific surface of a powdery product yet constitutes an approach to the problem, is only convenient for some pharmaceutical forms, such as suspensions or soft gelatin capsules. It cannot be a general solution to this problem. The adjunction of surfactants can increase the solubility of active components and thereby, improve the kinetics of resorption, but cannot necessarily allow obtaining higher blood levels. Moreover, it is often necessary to add very important amounts (25 to 50%) of a surfactant to obtain a defined result. This improvement in the passage by the digestive tract seems to result from a decrease in the superficial tension involving an increase of the digestive mucous permeability.
The beneficial effect obtained by adding an emulsifying agent and especially a fatty acid ester of a glucid proceeds from a different principle. This ester increases the molecule lipophily and makes passage through the intestinal barrier more easy to clear. Nevertheless, this type of process gives some result only with very lipophilic molecules and requires high concentrations of such fatty acid esters of glucid.
It is also known that, for active substance absorption, the gastro-intestinal tract level of which is limited due to their low solubility in biological liquids, one of the possibilities offered to the galenist for the improvement of kinetics of dissolution is the production of solid dispersions. These solid dispersions (defined by Chiou et al in J. Pharm. Sci., Vol. 60, pp. 1281-1302, 1971) constitute systems which, depending on the process used for their production, may present different structures (see Ford, Pharm. Acta. Helv., Vol. 61,3, pp. 69-88, (1986) Bloch et al, Pharm. Acta. Helv., Vol. 62, pp. 23-27, (-1987)), corresponding to different crystallographic states. The vitreous state, though it is a solid state, draws near to a liquid state for its structural disorder. It is a little orderly state, easy to break and which improves substantially the rate of dissolution for less soluble components. Nevertheless, despite the great number of publications relating to the production of solid dispersions, especially for Macrogols or Poloxamers, this technique has not known any important development because of its lack of generality. In some cases, the rate of dissolution is great. In other cases, the rate of dissolution is weaker and makes one's way toward an asymptotic value. For the same drug and for the same concentration, it has been established very significant variations in rates of solubility in terms of the nature of co-fusing agent and even in certain cases, the impossibility to obtain a complete solubilization of the active component, even after a protracted time of contact.
OBJECTS OF THE INVENTION
It is an object of the invention to provide a novel process for dry pharmaceutical products and the co-precipitate formed thereby which, when administered orally has a faster and greater resorption.
It is another object of the invention to provide improved pharmaceutical compositions and method of use.
These and other objects and advantages of the invention will become obvious from the following detailed description.
THE INVENTION
The novel process of the invention for the production of a solid dispersion of at least one therapeutic agent in a hydrophilic carrier having enhanced solubility in an aqueous media comprises dissolving at least one therapeutic agent in a volatile organic solvent containing a very hydrophilic polymer and evaporating the solvent to dryness to form a co-precipitate of therapeutic agent and hydrophilic polymer.
The fact is that the resorption in the digestive tract takes place over a short time and in a reduced space. It is therefore of importance that, in the formulation of the invention, the active component will be conveyed quickly and completely in a solubilized form as the absorption rate will be dependent therefrom. It appeared that the best absorption kinetics were obtained with dispersions in very hydrophilic polymers and especially in polyvinylpyrrolidone in a co-precipitated form. A dissolution rate of 80% within 10 minutes at least has been obtained. Applicants' studies have shown that the dissolution rate will be increased still more when the organic solvent also contained a surface-active agent which further improves the wetability of the active ingredient and optionally limits the phenomenon of growth of crystals which operates during the conservation of solid dispersions and leads to a decrease of the kinetics of dissolution as a function of time.
Since 1961, date when Sekiguchi et al. Chem. Pharm. Bull., Vol. 9 (1961), pp. 866-872, have proposed for the first time the use of solid dispersion, about 300 publications describing the mode of production of these systems as well as their physico-chemical, galenical, and pharmaceutical properties have issued in the literature. This pharmaceutical technique widely described in the literature, concern more than a hundred of active ingredients dispersed in at least thirty or more various hydrophilic carriers and has been made the subject of many synthetic reviews Bloch et al/Chiou et al/Duchene Pharma., Vol. 1, (11), pp. 1064-1073 (1985)/Ford/Puisieux et al Pharma, Prob. et Tech., Vol. 305, pp. 11-20 (1981).
The solid dispersions are systems in which one or several active ingredients are dispersed in the solid state (microparticular, even molecular) in an inert solid vehicle (Chiou et al). These solid dispersions have to be made distinct from mere mixture of powders designated under the name of physical mixture. Two methods are currently used for the preparation of solid dispersions: the method of melting/solidification which leads to the formation of co-melted—and the method of dissolution/evaporation which leads to the formation of co-precipitates. A mixed method resulting from the combination of both preceding methods, is sometimes cited but appears to be seldom utilized.
The process of the invention utilizes the formation of co-precipitates by means of dissolution—evaporation. The very hydrophilic polymer dissolved in the organic solvent preferably is a polyvinylpyrrolidone having a molecular weight ranging from 10,000 to 5,000, a (N-methylpyrrolidone) or a N-methylpiperidone-2). These selected cyclic lactams are very soluble in water and produce co-precipitates which are easily and wholly soluble in water.
The organic solvent usually is a solvent which both dissolves the very hydrophilic polymer and the active ingredient while having a sufficiently high degree of volatility to be in a position to be after dissolution of the mixture, evaporated off without having recourse to—very strong, physical means—such as heat or vacuum. Such solvents are for example oxygenated solvents such as ethanol, isopropanol, tetrahydrofuran, isopropyl ether, acetone, methy ethyl ketone, tetrahydropyran, or chlorinated solvents such as methylene chloride or even mixtures in various proportions of these same solvents.
The optionally added surface-active agent preferably is a non-ionic surface active agent selected from the polyoxyethylenic esters of sorbitan and saturated or unsaturated fatty acids having at least 8 carbon atoms; polyoxyethylenic ethers of fatty alcohols of at least 8 carbon atoms and the polyoxyethylenic esters of stearic acid.
The non-ionic tensio-active agent is selected from among those having an amphiphilic character but with a hydrophilic predominancy, having a HLB>12, such as the polyoxyethylenic esters of sorbitan and fatty acids such as Tweens 20 to 80, the polyoxyethylenic ethers of fatty alcohols such as the Brijs 56, 58, 78, 96, 97, 98, 99; G 3816 and 3820, G 3910 and 3920 or Ethylan D254 to 257 or Renex or Cremophor as well as those of Pluronic type (block-Copolymers of ethylene oxide and propylene oxide such as Pluronics F 68 and F 87 or Poloxamer 188).
Among the hardly water soluble active ingredients, the incorporation of which in the pharmaceutical compositions of this invention may be retained, these may be cited more particularly.
  • anti-inflammatories and analgetics
    • salsalate
    • benorylate
    • oxametacine
    • piroxicam
    • nimesulide
    • floctafenine
    • ethenzamide
  • immunosuppressants
    • cyclosporine
  • anti-histaminics
    • terfenadine
    • brompheniramine
    • chlorpheniramine
  • antifungals and anti-trichomonas
    • metronidazole
    • ornidazole
    • dapsone
    • itraconazole
  • antivirals
    • cytarabin
  • antipsychotics
    • sulpiride
    • sultopride
  • hormones
    • estradiol and its esters
    • estrone
    • estriol
    • progesterone and its derivatives
  • cardio-vascular agents
    • dobutamine
    • diltriazem
    • nifedipine and analogs
  • anti-ulcerous agents
    • pirenzepine
  • anti-bacterial agents
    • erythromycin
    • flumequine
    • oxytetracycline
    • piperacillin
    • cefuroxime
  • anti-arrhythmic agents
    • propafenone
    • amiodarone
    • cordarone
    • flecainide
    • gallopamil
    • verapamil
    • dipyridamole
    • diisopyramide
  • anti-migrainous agents
    • flunarizine
    • derivatives of ergot
  • anti-depressants
    • fluvoxamine
    • fluanisone
  • anti-hormones
    • flutamide
  • broncho-dilators
    • tulobuterol
    • talinolol
    • prenalterol
  • anxiolytics
    • thiothixene
    • trazodone
    • doxepine
  • vaso-dilators
    • ethaverine
    • pentoxyphylline
    • eburnamonine
  • diuretics
    • furosenide
    • triamterene
    • torasemide
  • anti-spasmodics
    • flavoxate
    • trimebutine
  • agents inhibiting the excretion of calcium
    • clodronate
    • pamidronate
  • anti-coagulating agents
    • pindione
    • tromexan
      and/or hypocholesterolemiants, and more precisely the derivatives of clofibric acid such as for example
    • clofibrate
    • clofibride
    • fenofibrate
    • gemfibrozil
    • benzafibrate
      and finally mainly metronidazole, itraconazole, cyclosporine, piperacilline and cefuroxime.
Principally, the content of active ingredients in the pharmaceutical composition of this invention is of the same order of magnitude as with the usual pharmaceutical composition.
A more significant attention has to be paid to the compounds which are little or not resorbed in the intestines such as progesterone and its derivatives. It is preferred that the substitution in 17 α is needed in order that the progesteronic agents are active orally (cyproterone acetate, demegestone, promegestone, norethynodiol diacetate, medroxyprogesterone acetate . . . ) but this substitution has an effect to induce at the same time, noxious side-effects (androgenic or anti-androgenic action, estrogenic action . . . ) which are not at all desired. It appears highly desirable to use native progesterone or a derivative of progesterone such as dihydroesterone, 17α-hydroxyprogesterone for example, which does not bear any supplemental substituent in position 17α.
The resorption of such molecules is made easier by incorporating them in the form of a solid dispersion of the invention in an outer shell in the presence or absence of surface-active agents. In such a medium, the progesteronic derivative easily and quickly dissolves in the presence of water.
In the case of progesteronic derivatives, one may realize co-precipitates containing from 10 to 60% by weight of active ingredient. The amount of surface active agent ranges from 0.5 to 20% related to the whole mass. The preferred content ranges from 15 to 35% for the progesteronic derivative and from 1 to 10% of surface-active related to the whole mass. Co-precipitates of progesteronic derivatives are obtained which dissolve practically in an integral manner in water or in an aqueous medium in 10 to 20 minutes under stirring, depending on the content of progesteronic derivative.
Studies performed by the applicants have shown that: A) The presence of surface active agents such as polysorbate 80, improves the rate of release of the progesteronic derivative whatever is the co-precipitate. This improvement is all the more significant because the content of active ingredient increases in the sample. It is then for example that the average levels of dissolution of the progesteronic derivative in the co-precipitates having 30 and 50% w/w active ingredient with polysorbate, respectively are 95 and 60% in 10 minutes as compared with 55 and 18% for the same samples prepared without polysorbate. B) The rate of dissolution of the progesteronic derivative is independent of the content of polysorbate 80 in the co-precipitates with 20 and 30% w/w of active ingredient because the kinetics are practically superimposable. On the other hand, this rate of dissolution depends on the percentage in weight of polysorbate 80 for the co-precipitates at 50% w/w.
The best kinetics are obtained with the sample containing 10% w/w of polysorbate 80. This result shows that a more significant amount of surface active agent is required to facilitate the wetting and the dissolution of a progesteronic derivative when its content is high in the co-precipitate.
However, it has been determined that during their storage, the solid dispersions are susceptible to evolve to more thermodynamically stable states by recrystallization or growth of dispersed particles, knowing that time and temperature factors have a significant effect on this transformation, and it appears necessary to study the future of the co-precipitates of progesterone/PVP and progesterone/PVP/polysorbate 80 after 6 months of storage at different temperatures. The results of the studies have shown that the kinetics of dissolution of the progesteronic derivative obtained from co-precipitates stored 6 months at 4° C., 20° C., and 37° C. do not present significative differences with freshly prepared products whatever the temperature of preservation is and whatever the concentration of active ingredients of the kinetics of dissolution in the case of progesterone is.
When the organic solution brought to dryness is ground, the resulting pulverulent product can be diluted with carriers or pharmaceutical vehicles or be subjected to a coating by fluidized bed. The achieved pharmaceutical forms can be packed in the form of tablets, sugar-coated pills, pills, soft gelatin capsules or sachets according to the usual technics of the industrial galenics. It is also possible to form by coating in a fluidized bed a granule which can be broken, screened and compressed or kept intact, and which can be divided in tight sachets ready for administration.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 are graphs showing the dissolution in water of 200 grams of powder per liter.
FIGS. 3 and 4 are the percentage of dissolution of the compositions in water.
In the following examples, there are described several preferred embodiments to illustrate the invention. However, it should be understood that the invention is not intended to be limited to the specific embodiments.
The performed tests have thus had as an aim to improve the kinetics of dissolution of an active ingredient such as progesterone to improve the bioavailability of this hormone after oral administration. In a first part, a number of solid dispersions have been prepared by the method of melting/solidification and or by the method of dissolution/evaporation using five hydrophilic excipients: saccharose distearate, polyoxyethyleneglycol 4000, polyvinyl pyrrolidone, citric acid, and phospholipids. The thus-finalized techniques have allowed to obtain, in a reproducible manner, products showing a clear improvement in the dissolution of progesterone.
Physical mixtures containing 20, 30 and 50% w/w of progesterone have been prepared with polyvinyl pyrrolidone (Kollidon 30 BASF) while replacing respectively 1, 5 or 10% w/w of PVP with the corresponding amount of polysorbate 80. The process of manufacture of these samples without a tensio-active agent but the physical mixture is dissolved in a sufficient amount of absolute ethanol contained in the solution, polysorbate 80. The conditions for evaporating the solvent are those previously listed and the co-precipitates also show the appearance of a white, crumbly and easily recoverable foam. The optimal diluent for the forthcoming of this study has been polyvinylpyrrolidones with which a co-precipitate containing 20% w/w of progesterone, shows a rate of dissolution of 80% in 10 minutes.
In a second part, it has been tried to further optimize the formulation of the co-precipitates of progesterone/PVP by modifying, on one side, the concentration of the active ingredient in the samples, and/or the conditions of evaporation of the solvent, and studying on the other side, the influence of the surface-active agent incorporated in the formulation at various concentrations. It has been stated that polysorbate 80 or Cremophor EL very significatively improved the rate of dissolution of progesterone. The best results have been obtained with the more concentrated co-precipitates.
In a third part, it has been evidenced that the kinetics of dissolution of progesterone after 6 months storage at 4° C., 20° C. and 37° C., do not significantly change in comparison with those recorded with the freshly prepared products when the samples contained polysorbate 80. However, as regard to the samples prepared without polysorbate 80, the increase of the temperature may be a factor unfavorable for the good conservation of the samples, even when the observed change results in the improvement of the kinetics of dissolution of progesterone. It may then be assumed that for temperatures near 37° C., some changes in the physical properties of the co-precipitates appear, as for example, a vitreous transition which thus promotes the release of the active ingredient.
From the entire results, it appears that the co-precipitates with 30 to 50% w/w of polysorbate 80 in PVP show good galenical characteristics. In fact, the rates of dissolution of the hormone after storage are superposable to those obtained with a freshly prepared product on one side, and provide, on the other side, a rate of dissolution higher than 95% in less than 10 minutes. Another advantage of the process of this invention resides in the fact that the co-precipitates contain a high content of active ingredient and from that, it may be possible to achieve pharmaceutical formulations which are less voluminous and more particularly, soft gelatin capsules of small size.
I-PROGESTERONE
1. Preparation of solid dispersions according to the invention
A-Preparation of physical mixtures
Physical mixtures containing 20, 30 or 50% w/w of progesterone in polyvinylpyrrolidone (Kollidon 30 BASF) were prepared by stirring for 10 minutes with a Mixer TURBULA. For each sample, the total amount per industrial batch was 5 g.
B-Preparation of co-precipitates of progesterone
The physical mixtures containing various proportions of progesterone were dissolved in a sufficient amount of absolute ethanol and the solid dispersions were obtained by evaporating off the solvent under the following conditions:
    • the speed of rotation of the flask was 100 Rd/min.
    • the temperature of the water bath was increased to 90° C.
    • the pressure in the inside of the flask was gradually increased to 200 millibars to prevent strong boiling of alcohol and then when the solution showed a viscous appearance, the pressure was again decreased to 50 millibars. The remaining alcohol was quickly removed and the co-precipitate which appeared in the form of a very stable white foam was easily recoverable by scratching the bottom of the flask with a spatula.
The thus-obtained samples were kept for 48 hours in an exsiccator before being ground and sieved to a grain size <100 pm.
C-Preparation of co-precipitates of progesterone-polyvinyl-pyrrolidone-polysorbate 80
The co-precipitates were prepared by the above process and then provided the most complete guaranties relating to stability. The following examples which relate to the more particular case of progesterone are only given as a way of illustration without limiting it in any manner.
TABLE 1
preparation of co-precipitates 20% w/w with polysorbate 80
Solution of
polysorbate 80
Polyvinyl in ethanol Absolute
Progesterone pyrrolidone (5 g/l) ethanol
with 1% of 1 g 3.95 g  10 ml 80 ml
polysorbate 80
with 5% of 1 g 3.75 g  50 ml 40 ml
polysorbate 80
with 10% of 1 g 3.50 g 100 ml  0
polysorbate 80
TABLE 2
preparation of co-precipitates 30% w/w with polysorbate 80
Solution of
polysorbate 80
Polyvinyl in ethanol Absolute
Progesterone pyrrolidone (5 g/l) ethanol
with 1% of 1.5 g 3.45 g  10 ml 100 ml
polysorbate
80
with 5% of 1.5 g 3.25 g  50 ml 60 ml
polysorbate 80
with 10% of 1.5 g 3.00 g 100 ml 10 ml
polysorbate
80
TABLE 3
preparation of co-precipitates at 50% w/w with polysorbate 80
Solution of
polysorbate 80
Polyvinyl in ethanol Absolute
Progesterone pyrrolidone (5 g/l) ethanol
with 1% of 2.5 g 2.45 g  10 ml 120 ml
polysorbate
80
with 5% of 2.5 g 2.25 g  50 ml 70 ml
polysorbate 80
with 10% of 2.5 g 2.00 g 100 ml 20 ml
polysorbate
80

2-Study of the Kinetics of dissolution
A-Experimental method
The device for measuring utilized for the galenic control of the solid dispersions consisted of three members:-an apparatus for dissolution Dissolutest PT 6 from Erweka-a peristaltic pump 502 SR from Watson Marlow and-a spectrophotometer coupled with an automatic apparatus for dissolution, from SAFAS.
Each test of dissolution was carried out in one liter of degassed water at 37° C. and a pH close to neutral. A sample weighing about 5 mg of progesterone (i.e. 25 mg of co-melting or co-precipitate) was introduced into each of the six reactors at time TO with a speed of stirring of the paddles of 100 rpm. The dosing through UV absorption at 250 nm was performed continuously, and in closed circuit using a multi-channel peristaltic pump connecting the beakers of the Dissolutest apparatus, to the dishes of the spectrophotometer. The latter was linked to a recorder and to a printing machine to permit the measurement at constant intervals of every 3 minutes of the variations of the optical density, themselves being proportional to the variations of concentration of the active ingredient in the medium of dissolution.
B-Results
B.1-Kinetics of dissolution of the co-precipitate of Progesterone-PVP
The kinetics of dissolution of progesterone starting with the solid dispersions containing 20, 30 and 50% w/w of active ingredient are shown in Table 1. These results indicate that the rate of release of the hormone was dependent on the content of active ingredient in the co-precipitate. It was effectively noticed a rate of dissolution near 95% in 10 minutes for the co-precipitates at 20% w/w versus 55% and 18% for the co-precipitates at 30 and 50% w/w. This result showed that the best kinetics were obtained with the less concentrated solid dispersions, that is likely linked with a greater dispersion of the active ingredient within the co-precipitate when its content was low in the sample.
On the other side, it is interesting to point out that the kinetics of dissolution of the co-precipitates with 20% w/w were more rapid than those recorded at the time of the preliminary studies with samples of the same concentration. The result may be attributed to changes in the conditions of production. While decreasing the pressure and increasing the temperature of the water bath, the evaporation of the solvent was made easier and the crystallization of the active ingredient which remains incompletely crystallized or in a more or less amorphous state, was inhibited and then the active ingredient was more soluble.
B.2-Kinetics of dissolution of the co-precipitates of progesterone/PVP/Polysorbate 80
The kinetics of dissolution of progesterone starting from solid dispersions containing 20, 30 and 50% w/w of active ingredient with various proportions without or with 1, 5 or 10% w/w of polysorbate 80 are illustrated in the table IV, V, VI and VII.
TABLE IV
PROGESTERONE-PVP
Time co-precipitates after manufacture
(minutes) 20% 30% 50%
0 0 0 0
3 77.32 33.49 5.55
6 88.65 45.79 9.76
9 92.93 53.38 17.06
12 95.31 57.61 18.73
15 96.74 62.85 22.30
18 97.77 65.71 23.73
21 98.38 68.01 27.38
24 99.03 71.11 30.39
27 99.82 74.68 33.01
30 99.90 77.79 35.07
33 99.90 80.39 37.46
36 99.90 83.17 39.12
39 99.90 85.26 41.34
42 99.90 87.46 43.14
45 99.90 88.01 44.82
48 99.90 89.28 46.58
51 99.90 91.26 48.80
54 99.90 92.46 50.55
57 99.90 94.20 51.11
60 99.90 94.92 52.06
TABLE V
PROGESTERONE-PVP 20% co-precipitates
Time after manufacture with polysorbate 80
(minutes) 1% 5% 10%
0 0 0 0
3 87.30 86.54 80.26
6 94.20 94.55 92.69
9 97.15 98.90 97.40
12 99.50 99.60 100
15 99.80 100 100
18 100 100 100
21 100 100 100
24 100 100 100
27 100 100 100
30 100 100 100
TABLE VI
PROGESTERONE-PVP 30% precipitates
Time after manufacture with polysorbate 80
(minutes) 1% 5% 10%
0 0 0 0
3 79.59 83.44 28.66
6 88.88 93.60 91.04
9 92.85 96.93 96.01
12 96.74 98.40 95
15 98.23 99.40 99.70
18 99.86 99.79 100
21 100 100 100
24 100 100 100
27 100 100 100
30 100 100 100
TABLE VII
PROGESTERONE-PVP co-precipitates
Time after manufacture with polysorbate 80
(minutes) 20% 30% 50%
0 0 0 0
3 22.38 36.82 44.91
6 37.93 51.90 60.10
9 46.42 61.50 69.70
12 54.12 67.22 74.40
15 58.65 71.98 78.90
18 62.38 76.36 83.50
21 65.15 80.47 89.84
24 68.49 81.66 93.96
27 70.63 83.04 95.55
30 72.38 84.52 96.79
33 74.28 86.31 98.25
36 75.39 87.49 98.49
39 77.14 88.49 100
42 78.65 89.12 100
45 80.23 90.71 100
48 81.57 91.76 100
51 82.38 92.58 100
54 82.93 92.93 100
57 83.88 93.17 100
60 85.15 93.92 100
TABLE VIII
PROGESTERONE-PVP co-precipitates
Time after 6 months storage at 4° C.
(minutes) 20% 30% 50%
0 0 0 0
3 78.87 32.22 8.01
6 86.80 42.77 15
9 89.10 48.65 20.79
12 91 52.30 25.39
15 92.90 56.26 29.76
18 94.60 58.49 33.33
21 96 60.71 37.14
24 97.80 63.17 40.24
27 98.80 65.28 42.93
30 100 68.41 46.03
33 100 70.23 47.93
36 100 71.82 51.11
39 100 73.96 52.14
42 100 75.07 54.20
45 100 78.88 56.35
48 100 79.93 57.62
51 100 80.95 59.84
54 100 82.06 60.95
57 100 83.09 62.54
60 100 83.80 64.20
TABLE IX
PROGESTERONE-PVP co-precipitates
Time after 6 months storage at room temperature
(minutes) 20% 30% 50%
0 0 0 0
3 83.33 30.87 12.40
6 90.79 42.14 22.69
9 93.25 47.62 30.47
12 95.30 53.57 37.77
15 96.90 55.95 42.85
18 97.90 60.79 47.69
21 98.80 62.30 52.22
24 99.80 64.20 55.70
27 100 67.90 58.48
30 100 70.48 61.98
33 100 71.98 64.68
36 100 75.16 66.81
39 100 76.90 69.67
42 100 78.57 71.58
45 100 80.32 72.93
48 100 81.83 75.63
51 100 82.78 77.23
54 100 83.01 78.48
57 100 83.65 79.99
60 100 85.32 81.35
TABLE X
PROGESTERONE-PVP co-precipitates
Time after 6 months storage at 37° C.
(minutes) 20% 30% 50%
0 0 0 0
3 82.69 43.73 18.02
6 90.55 65.63 32.30
9 96.42 71.50 42.54
12 97.69 74.92 51.67
15 98.96 77.22 58.10
18 99.44 78.09 64.21
21 100 80.01 68.33
24 100 81.77 71.91
27 100 83.09 76.03
30 100 83.96 79.13
33 100 84.28 80.79
36 100 85.58 83.89
39 100 86.22 85.72
42 100 87.34 86.75
45 100 88.65 88.76
48 100 89.20 90.86
51 100 89.84 91.26
54 100 90.46 82.26
57 100 91.19 93.56
60 100 91.98 94.66

3-Study of the kinetics of dissolution after storage
A-Kinetics of dissolution of the co-precipitates of Progesterone-PVP
The kinetics of dissolution of progesterone starting from solid dispersions containing 20, 30 and 50% w/w of active ingredient after six months storage at 4° C., 20° C. and 37° C. are shown in tables VIII to X. As previously, it has been noticed that the rate of release of the hormone depends on its content in the co-precipitate. However, a comparison between the kinetics of dissolution after six months of storage, as compared to those measured with the same freshly-produced products, show that the increase in the temperature of storage seems to improve the rate of dissolution of progesterone in the most concentrated co-precipitates. The most significative result has been obtained with the co-precipitate with 50% w/w, stored at 37° C. for which a rate of dissolution of 95% after one hour was obtained as compared to 52% for the same product freshly produced.
B-Kinetics of dissolution of the co-precipitates of progesterone-PVP-polysorbate 80
The kinetics of dissolution of progesterone starting from a solid dispersion containing various proportions of polysorbate 80 and after storage for 6 months at 4° C., 20° C. and 37° C. are shown in the tables X, XI and XII. These results indicate that the kinetics of release of the hormone starting from co-precipitates stored for 6 months at 4°, 20° and 37° C. do not present any significant difference and are practically superposable to those recorded on freshly produced products. Temperature does not seem to play a determinant role in the conservation of the samples containing polysorbate 80 during the first 6 months of storage.
C-Comparative study of the phasma level of progesterone
RIA method after chromatography extraction of progesterone after oral administration to an empty stomach in 8 healthy menopausal female volunteers. (Cross-over study in hospitalized volunteers which had previously fasted the evening before, meal given after taking performed the fourth hour following the ingestion of the product).
TABLE XI
Ratio of the
geometric
Ex- averages of
pression AUC the AUC vs.
Studied of Cmax (ng. Utrogestan
compound the results (ng/ml) Tmax (h) ml1.b) 200 mg
Co-precipitate Mean 115.46 0.69 144.71 5.66
of the SEM 26.73 0.09 34.28
invention min-max 7.80- 0.50-1.00 18.62-
2 × 100 mg CV 231.58 0.38 335.98
0.68 0.69
Co-precipitate Mean 67.25 0.75 73.99 3.90
of the SEM 21.20 0.09 22.46
invention min-max 6.39- 0.50-1.00 15.36-
2 × 70 mg CV 167.62 0.36 209.95
0.91 0.90
Co-precipitate Mean 10.82 0.69 13.39 0.56
of the SEM 5.24 0.09 3.80
invention min-max 2.52- 0.50-1.00  5.47-
2 × 35 mg CV 47.82 0.38 10.07
1.40 0.84
Utrogestan ® Mean 8.61 2.06 23.51
2 × 100 mg SEM 3.51 0.58 4.91
min-max 0.57- 1-6  7.13-
CV 27.14 0.80 51.90
1.19 0.65
® Utrogestan is a brand name of a preparation based on micronized Progesterone

II-ESTRADIOL
1. Preparation of solid dispersions of the invention
A-Raw materials
The used raw materials were estradiol as the hemihydrate, art.680025 batch 24056446 from Schering AG (Berlin, Germany), polyvinylpyrrolidone (Kollidon 30 no. 56.0902 from BASF AG 67056 Ludwigshafen Germany). Tween 80 (polyoxyethylene sorbitan mono oleate AB 397). (ICI Chemicals, Niederlassung der deutsche ICI GMBH Goldschmidtstr. 100 D 4300 Essen 1) and Absolute ethanol (no. EEC 603.002.00.5) from Distillery Hauguel 76700 Gonfreville l'Orcher (F).
B-Apparatus
The apparatus to be used for the production of the solid dispersions were an electronic weighing machine A 120 Sartorius from OSI 141 rue de Javel 75015 Paris and a rotative evaporator RE Büchi, from Roucaire 20 avenue de l'Europe 78143 Velizy (F).
C-Preparation of the solid dispersions by dissolution-evaporation
The physical mixtures containing 10% estradiol w/w had the following composition: 0.5 g of estradiol, 4.25 g of PVP, 0.25 g of Tween 80 i.e. 50 ml of a 5 g/l solution in absolute ethanol and 20 ml of absolute ethanol enough for dissolving both estradiol and PVP. These mixtures were dissolved each in a sufficient amount of absolute ethanol. About 50 ml ethanol were needed for each gram of estradiol, 10 mol of ethanol per gram of PVP. The solid dispersions were obtained by evaporating the solvent under reduced pressure (p=200 millibars) for 15 minutes, and then the pressure was reduced to its minimum (about 40 millibars) for 15 minutes. The temperature of the water bath was 60° C. and the speed of rotation of the flask was 100 rounds/minute. The recovered samples were placed in an exsiccator for 47 hours and then were ground and screened. The galenical tests were performed on samples having granulometry lower than 100 micrometers.
2-Study of the kinetics of dissolution
A-Experimental method
The system of measurements used for the galenical control of the solid dispersions was made of two members: an apparatus of dissolution DISSOLUTEST DT 6 from ERWEKA |Euraf 55 rue Deschanel 92400 Courbevoie (France)| and a peristaltic pump 505 SR WATSON-MARLOW from Prolabo. Each test of dissolution was performed in one liter of degassed distilled water at 37° C. and at a pH near neutral. A sample of 4 mg of estradiol (i.e. 25 mg co-precipitate) was introduced in each of the six reactors at time t=0 and the speed of stirring of the paddles was 100 rounds/min. The dosages by UV (absorption at 278 nm), were performed continuously and in a closed circuit of a multi-channel peristaltic pump, connecting the beakers of the Dissolutest to the dishes of the spectrophometer. The latter was linked to a recorder and to a printing machine to permit the measurement at steady intervals of every 3 minutes of the variations of the optical density, themselves being proportional to the variations of the concentration of the active ingredient in the dissolution medium.
B-Results
The kinetics of dissolution of estradiol from the solid dispersions at 10% w/w are presented in FIG. 1. From this table, it may be seen that for the co-precipitates with 10% w/w of estradiol, an instantaneous dissolution which allows one to reach a percentage of dissolved compound of at least 65% in 3 minutes and at least 75% in 15 minutes.
TABLE XII
Estradiol
10%-PVP 75%
Time Polysorbate 80 - 5% w/w co-precipitates
(minutes) Dish 1 Dish 2 Dish 3 Dish 4 Dish 5 Dish 6
0 0 0 0 0 0 0
3 67.36 67.36 67.36 63.15 67.36 67.36
6 71.57 71.51 71.51 63.15 71.57 71.57
9 71.51 71.51 71.51 63.15 71.57 71.57
12 71.57 75.78 75.78 67.36 75.78 75.78
15 75.78 75.78 75.78 67.36 75.78 75.78
18 71.57 75.78 75.78 67.36 75.78 75.78
21 75.78 75.78 75.78 67.36 75.78 75.78
24 75.78 75.78 75.78 67.36 75.78 75.78
27 75.78 75.78 75.78 67.36 75.78 75.78
30 80 75.78 80 67.36 80 80
33 84.21 75.78 80 67.36 80 80
33 84.21 75.78 80 67.36 80 80

III-MIXTURES OF PROGESTERONE-ESTRADIOL
1-Production of solid dispersions of the invention
A-Raw materials
The used raw materials were the same as those used in the case of estradiol (chapter IV) to which progesterone was added (USP and EP batch 347 JA) from Upjohn Company Fine Chemical Division, Kalamazoo, Mich. 40991 (USA).
B-Apparatus
The apparatus was also the same than that used in the case of estradiol.
C-Production of solid dispersions by dissolution/evaporation
The performed co-precipitates had the following composition: 2.5 g of progesterone, 0.05 g of estradiol, 2.2 g of PVP and 0.25 g i.e. 50 ml of a solution at 5 g/l of Tween 80 in absolute ethanol. 103 ml of absolute ethanol were needed for the complete dissolution of the various components (50 ml absolute ethanol for 1 g of progesterone, 10 ml for 1 g of estradiol). The solid dispersions were obtained by evaporation of the solvent under vacuum (P=200 millibars) for 25 minutes, and then the pressure was decreased to its minimum (about 40 millibars) for 35 minutes. The temperature of the water bath was 60° C. and the speed of rotation of the flask was 100 rounds/minute. The thus-recovered samples were placed in an exsiccator for 48 hours and then were ground and sieved. The galenical tests were performed on samples having a granulometry lower than 100 micrometers. The co-precipitates obtained before staying in the exsiccator were in the form of a crystalline block, pale yellow or white, and small crystalline clusters were also recovered.
2-Study of the kinetics of dissolution
These tests of dissolution were performed in water and the used co-precipitates contained 50% progesterone and 1% estradiol. Two tests were performed: one with 200 mg of powder per liter of water and the other with 20 mg of powder per liter of water. The performance of these two tests may be explained by the fact that estradiol cannot be detected in a sample containing 20 mg of powder per liter of water and it had been necessary to use a sample of 200 mg of powder per liter of water to be able to detect estradiol.
Results: Test 1 (200 mg powder for 1 liter water)
TABLE XIII
Content in estradiol Content in progesterone
Percentage Percentage Percentage
Percentage in in in
in relation to relation to relation to
relation to the the the
Time theoretical measured theoretical measured
(min.) mg/l content content mg/l content content
3 <0.3 <15 <25 0.78 0.8 1.0
6 <0.3 <15 <25 4.56 4.6 6.0
9 0.46 23 38.3 6.33 6.3 8.3
12 0.76 38 63.3 6.58 6.6 8.6
15 0.82 41 68.3 6.30 6.3 8.2
18 0.86 43 71.7 6.43 6.4 8.4
Test 2 (20 mg powder per liter of water)
TABLE XIV
Content in estradiol Content in progesterone
Percentage Percentage Percentage
Percentage in in in
in relation to relation to relation to
relation to the the the de-
Time theoretical determined theoretical termined
(min.) mg/l value content mg/l value content
3 ND 0.27 2.7 3.5
6 ND 2.99 29.9 39.0
9 ND 3.87 38.7 50.5
12 ND 4.28 42.8 55.9
15 ND 4.49 44.9 58.6
18 ND 4.54 45.4 59.3
ND: Not detectable

3-Profiles of dissolution of the solid mixture progesterone-estradiol in water
The curves of dissolution versus time are presented below: FIG. 1: (test of dissolution in water of 200 mg of powder per liter), FIG. 2: (test of dissolution in water of 20 mg of powder per liter), FIG. 3: (test of dissolution in water of 200 mg of powder per liter) and FIG. 4: determination of the percentage of progesterone dissolved in water starting of 20 mg of powder per liter of water.
IV-SOLID DISPERSIONS WITH FENOFIBRATE
1-Production of the solid dispersions of the invention
A-Raw materials
Fenofibrate (batch F 0092×100) from Schweizerhalt France-Deshors 17 Bd de Montmorency 75016 Paris, polyvinylpyrrolidone (Kollidon 30 - Nr 56 - 0902) from BASF AG 67056 Ludwigshafen Germany, Tween 80 (polyoxyethylene sorbitan monooleate) batch AB 397 (ICI Chemicals, Niederlassung der deutsche ICI GMBH, Goldschmidstr 100 D-4300 Essen 1) and absolute ethanol from Distillery Hauguel 76700 Gonfreville l'Orcher (F).
B-Apparatus
The needed material was exactly the same as that which had been used to produce the foregoing co-precipitates.
C-production of the solid dispersions by dissolution-evaporation
Five series of co-precipitates were achieved, each including 6 different samples.
TABLE XV
Series
1 2 3 4 5
Fenofibrate 2.5 gr 2 gr 1.5 gr 1 gr 0.5 gr
PVP K30 2.25 gr 2.75 gr 3.25 gr 3.75 gr 4.25 gr
Tween
80 0.25 gr 0.25 gr 0.25 gr 0.25 gr 0.25 gr
Absolute 103 ml 81 ml 61 ml 41 ml 21 ml
ethanol
The solid dispersions were produced by evaporating under vacuum (P=205 millibars) for 25 minutes and then the pressure was decreased to its minimum (40 millibars) for 25 minutes. The temperature of the water bath was 60° C. and the speed of rotation of the flask was 100 rounds per minute. The duration of the evaporation was adapted, depending on the amount of absolute ethanol added for dissolving the products and then as a function of the series of the co-precipitates. The Samples with 2.5 g of fenofibrate had a yellowish appearance and formed a pellet more or less viscous, after one hour of evaporation at the minimal pressure.
The more the pressure was decreased (the amount of absolute ethanol added, decreasing from this fact), the more the recovered samples were clumsy, in the form of fine powder or granules. The color was white and bright and the co-precipitates appeared as being very dry. The thus-recovered samples were placed in an exsiccator for 48 hours and then were ground and sieved. The galenical tests were performed on samples of grain size lower than 100 micrometers.
2-Study of the kinetics of dissolution
A-Experimental method
This was identical to that used for the study of the kinetics of dissolution for the co-precipitates of estradiol.
B-Results
The maximal solubility of fenofibrate in water had been previously determined which was less than 3 mg/l. The co-precipitates produced above respectively contained 50%, 40%, 30%, 20% and 10% by weight of fenofibrate. When someone wanted to introduce in the reactors an amount of fenofibrate which allowed the total solubilization in 1 liter of water, he would need to weigh respectively 6 mg, 7.5 mg, 10 mg, 15 mg and 30 mg of co-precipitates. This accuracy in this measurement which was due to minute but unavoidable losses due to handling, cannot be achieved.
Therefore, it had been decided to prepare a calibrating range at 5 mg/l as for progesterone and to determine the kinetics of dissolution while introducing an equivalent amount of co-precipitate. This study permitted to quantify the amount of solubilized fenofibrate and in the course of this test, a recrystallization of fenofibrate had been observed. The results are shown in tables XVI and XVII respectively, the calibrating range and the kinetics of dissolution of fenofibrate in the co-precipitates at 10% w/w (randomly selected series which was representative of a phenomenon common to the other co-precipitates).
TABLE XVI
Time Calibrating range of Fenofibrate at 5 mg/l
(minutes) Dish 1 Dish 2 Dish 3 Dish 4 Dish 5 Dish 6
0 0 0 0 0 0 0
3 95.26 95.26 98.94 93.68 94.21 93.15
6 92.1 92.1 95.78 91.05 92.1 90.52
9 87.89 87.89 91.05 86.31 87.89 85.78
12 83.68 83.68 86.31 82.1 83.15 80.52
15 80.52 80.52 83.15 78.42 80 76.84
18 77.89 77.36 80 75.26 77.36 74.21
21 74.73 74.73 76.84 71.57 73.68 71.05
24 72.1 72.1 73.68 68.94 71.05 68.42
27 70 70 71.57 66.84 68.94 66.31
30 68.42 67.89 69.47 64.73 67.36 64.73
The decrease of these kinetics of dissolution was exclusively due to the sensitivity of this formulation to the light and to the fact that the dosage was performed by UV Spectro-photometry at 278 nm, that resulted in a degradation of the formulation. This degradation was absolutely not due to the method of preparation of the co-precipitates but only to the technique of reading.
TABLE XVII
Co-precipitates fenotibeate 10% - PVP 25%
Time Polysorbate 80 - 5% w/w
(minutes) Dish 1 Dish 2 Dish 3 Dish 4 Dish 5 Dish 6
0 0 0 0 0 0 0
3 60.52 34.21 59.47 57.36 55.26 61.95
6 45.26 13.15 51.57 42.63 23.15 31.95
9 36.31 10.52 34.20 36.84 14.52 13.15
12 31.15 9.42 31.57 34.23 9.42 11.52
15 30 8.94 28.94 32.1 9.42 11.52
18 28.94 8.94 30.52 30.05 8.94 10
21 27.89 8.42 27.36 29.43 8.94 10
24 28.94 8.42 27.36 29.42 8.942 10
27 26.84 8.42 25.26 30.52 8.94 10
30 25.78 8.42 26.31 27.89 8.94 9.42
33 25.26 8.42 26.31 26.84 8.42 9.47
36 25.26 8.42 24.73 27.89 8.42 9.47
39 25.26 8.42 23.68 29.47 8.42 9.47
42 25.26 8.42 23.68 27.36 8.42 9.47
45 25.26 8.42 23.68 27.36 8.42 9.47
48 24.73 8.42 23.68 27.36 8.42 9.47
51 24.73 8.42 24.73 26.84 8.42 9.47
54 26.31 8.42 22.63 26.84 8.42 9.47
57 23.68 8.94 23.15 26.84 8.42 9.47
60 23.68 8.94 23.15 27.36 8.42 9.47
Herein also the UV Spectro-photometry was wholly responsible for the decrease of the kinetics of dissolution.
V-SOLID DISPERSIONS WITH MEDROXY PROGESTERONE ACETATE
1-Production of the solid dispersions of the invention
Five series of co-precipitates were realized each including six samples.
The amount of Medroxy progesterone acetate in each series was 0.5 g and that of polyvinylpyrrolidone ranged from 2 to 5 g. The solid dispersions were prepared according to the method described in example IV.
The solubility of Medroxy progesterone acetate in water is very low. The dosage of the amount of Medroxy progesterone acetate thus dissolved in water was determined by spectrophotometry at 241 nm.
The percentage of dissolved compound was about complete in 30 minutes at room temperature.
Various modification of the process and products of the invention may be made without departing from the spirit or scope thereof and it is to be understood that the invention is intended to be limited only as defined by the appended claims.

Claims (20)

1. A process for the production of a solid dispersion of 1 to 20% by weight of a surface active agent, 10 to 60% by weight of at least one therapeutic agent selected from the group consisting of progesterone and a mixture of progesterone and estradiol or an ester or ether thereof in a hydrophilic carrier having enhanced solubility in an aqueous media comprising dissolving the therapeutic agent in a volatile organic solvent containing a very hydrophilic polymer and the surface active agent in the said percentage and without strong heat or vacuum evaporating the solvent to dryness to form a co-precipitate of therapeutic agent and , hydrophilic polymer and surface active agent.
2. The process of claim 1 wherein the co-precipitate is ground and screened to obtain a uniform powder.
3. The process of claim 1 wherein the evaporation to dryness of the organic solution is carried out in a fluidized bed of air.
4. The process of claim 1 wherein the volatile organic solvent is an oxygenated solvent or a chlorinated solvent.
5. The process of claim 1 wherein the volatile organic solvent is an alkanol.
6. The process of claim 1 wherein the volatile organic solvent is methylene chloride.
7. The process of claim 1 wherein the volatile organic solvent is selected from the group consisting of ethanol, isopropanol and terbutanol.
8. The process of claim 1 wherein the very hydrophilic polymer is selected from the group consisting of polyvinylpyrrolidones, N-methylpyrrolidones, N-methylcaprolactam and the N-methylpiperidin 2-ones.
9. The process of claim 1 wherein the polymer is polyvinyl pyrrolidones having a molecular weight ranging from 10.00 10,000 to 50,000.
10. The process of claim 1 wherein the surface-active agent is a non-ionic surface-active agent.
11. The process of claim 1 wherein the non-ionic surface active agent is selected from the group consisting of polyoxyethylenic ester of sorbitan and saturated and unsaturated fatty acids having at least 8 carbon atoms, polyoxyethylenic ethers of fatty alcohols having at least 8 carbon atoms, polyoxyethylenic ethers of fatty alcohols having at least 8 carbon atoms and polyoxyethylenic esters of stearic acids.
12. The process of claim 1 wherein the surface-active agent is a polysorbate.
13. A solid dispersion with enhanced bioavailability of 1 to 20% by weight of a surface active agent, 10 to 60% by weight of at least one therapeutic agent selected from the group consisting of progesterone and an agent selected from the group consisting of progesterone and a mixture of progesterone and estradiol or an ester or ether thereof in a hydrophilic carrier having enhanced solubility in an aqueous media comprising dissolving the therapeutic agent in a volatile organic solvent containing a very hydrophilic polymer and the surface active agent in the said percentage and without strong heat or vacuum evaporating the solvent to dryness to form a co-precipitate of therapeutic agent and , hydrophilic polymer and surface active agent.
14. A solid dispersion with enhanced bioavilability of claim 13 wherein the therapeutic agent is a mixture of estradiol or one of its ester or ethers, and progesterone.
15. A pharmaceutical composition containing the solid dispersions obtained by claim 2 wherein the solid dispersion of therapeutic agents are admixed with an inert non-toxic pharmaceutically-acceptable carrier.
16. A pharmaceutical composition of claim 15 wherein the inert carrier is constituted by neutral pellets of starch.
17. A pharmaceutical composition of claim 15 wherein the inert carrier is an aqueous sterile medium.
18. A method for treating disorders connected with a hormonal insufficiency comprising administering to a female patient in need of such a therapy, a safe but effective amount of a therapeutic agent consisting of progesterone or progesterone and estradiol or an ether or ester thereof in the form of a solid dispersion obtained by the process of claim 1.
19. The method of claim 18 wherein the hormonal insufficiency is a luteal an estro-progestative insufficiency and the therapeutic agent is a mixture of estradiol and progesterone.
20. The method of claim 18 wherein the hormonal insufficiency is an estro-progestative insufficiency and the therapeutic agent is a mixture of estradiol and progesterone.
US10/190,499 1994-07-26 2002-07-08 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions Expired - Lifetime USRE39104E1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/190,499 USRE39104E1 (en) 1994-07-26 2002-07-08 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9409227A FR2722984B1 (en) 1994-07-26 1994-07-26 PROCESS FOR THE PREPARATION OF DRY PHARMACEUTICAL FORMS AND THE PHARMACEUTICAL COMPOSITIONS THUS PRODUCED
PCT/FR1995/001009 WO1997004749A1 (en) 1994-07-26 1995-07-27 Method for preparing dry pharmaceutical forms, and resulting pharmaceutical compositions
US08/670,497 US5776495A (en) 1994-07-26 1996-06-27 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions
US10/190,499 USRE39104E1 (en) 1994-07-26 2002-07-08 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US08/670,497 Reissue US5776495A (en) 1994-07-26 1996-06-27 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions

Publications (1)

Publication Number Publication Date
USRE39104E1 true USRE39104E1 (en) 2006-05-23

Family

ID=27252951

Family Applications (2)

Application Number Title Priority Date Filing Date
US08/670,497 Ceased US5776495A (en) 1994-07-26 1996-06-27 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions
US10/190,499 Expired - Lifetime USRE39104E1 (en) 1994-07-26 2002-07-08 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US08/670,497 Ceased US5776495A (en) 1994-07-26 1996-06-27 Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions

Country Status (4)

Country Link
US (2) US5776495A (en)
EP (1) EP0761208A1 (en)
FR (1) FR2722984B1 (en)
WO (1) WO1997004749A1 (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8633178B2 (en) 2011-11-23 2014-01-21 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US8933059B2 (en) 2012-06-18 2015-01-13 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US9180091B2 (en) 2012-12-21 2015-11-10 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US9289382B2 (en) 2012-06-18 2016-03-22 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US9931349B2 (en) 2016-04-01 2018-04-03 Therapeuticsmd, Inc. Steroid hormone pharmaceutical composition
US10052386B2 (en) 2012-06-18 2018-08-21 Therapeuticsmd, Inc. Progesterone formulations
US10206932B2 (en) 2014-05-22 2019-02-19 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US10258630B2 (en) 2014-10-22 2019-04-16 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10286077B2 (en) 2016-04-01 2019-05-14 Therapeuticsmd, Inc. Steroid hormone compositions in medium chain oils
US10328087B2 (en) 2015-07-23 2019-06-25 Therapeuticsmd, Inc. Formulations for solubilizing hormones
US10471072B2 (en) 2012-12-21 2019-11-12 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10471148B2 (en) 2012-06-18 2019-11-12 Therapeuticsmd, Inc. Progesterone formulations having a desirable PK profile
US10537581B2 (en) 2012-12-21 2020-01-21 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10806740B2 (en) 2012-06-18 2020-10-20 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US11246875B2 (en) 2012-12-21 2022-02-15 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11266661B2 (en) 2012-12-21 2022-03-08 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11633405B2 (en) 2020-02-07 2023-04-25 Therapeuticsmd, Inc. Steroid hormone pharmaceutical formulations

Families Citing this family (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2736550B1 (en) * 1995-07-14 1998-07-24 Sandoz Sa PHARMACEUTICAL COMPOSITION IN THE FORM OF A SOLID DISPERSION COMPRISING A MACROLIDE AND A VEHICLE
JP3180350B2 (en) * 1996-02-29 2001-06-25 藤沢薬品工業株式会社 β-lactam antibiotic-containing tablet and method for producing the same
CN1165291C (en) * 1996-05-20 2004-09-08 詹森药业有限公司 Anti-fungus composition with improved biological utilization ratio
US6465016B2 (en) * 1996-08-22 2002-10-15 Research Triangle Pharmaceuticals Cyclosporiine particles
US7255877B2 (en) * 1996-08-22 2007-08-14 Jagotec Ag Fenofibrate microparticles
ZA9710927B (en) * 1996-12-06 1998-06-15 Fujisawa Pharmaceutical Co Pharmaceutical composition.
FR2758459B1 (en) * 1997-01-17 1999-05-07 Pharma Pass FENOFIBRATE PHARMACEUTICAL COMPOSITION HAVING HIGH BIODAVAILABILITY AND PROCESS FOR PREPARING THE SAME
KR19990001564A (en) * 1997-06-16 1999-01-15 유충식 Azole antifungal agents with improved solubility and preparations containing them
FR2764800B1 (en) 1997-06-23 1999-09-10 Sanofi Sa SOLID PHARMACEUTICAL COMPOSITION CONTAINING BENZOFURAN DERIVATIVES
CA2214895C (en) * 1997-09-19 1999-04-20 Bernard Charles Sherman Improved pharmaceutical composition comprising fenofibrate
DE69808670T2 (en) * 1997-12-31 2003-07-03 Choongwae Pharma Corp., Seoul/Soul PRODUCTION METHOD AND COMPOSITION OF AN ORAL PREPARATION OF ITRACONAZOLE
DK1079808T3 (en) 1998-05-29 2004-06-07 Skyepharma Canada Inc Compositions with thermally protected microparticles and process for final vapor sterilization thereof
FR2783421B1 (en) * 1998-09-17 2000-11-24 Cll Pharma PROCESS FOR THE PREPARATION OF NOVEL GALENIC FORMULATIONS OF FENOFIBRATE, GALENIC FORMULATIONS OBTAINED BY SAID PROCESS AND THEIR APPLICATIONS
BR9915738A (en) 1998-11-20 2001-10-02 Rtp Pharma Inc Microparticles stabilized in dispersible phospholipids
EP1163234B1 (en) 1999-03-24 2005-10-26 R.P. Scherer Technologies, Inc. Pharmaceutical formulations with improved aqueous solubility
US6719999B2 (en) * 1999-03-31 2004-04-13 Abbott Laboratories Formulations comprising lipid-regulating agents
DE19929361A1 (en) * 1999-06-25 2001-01-04 Basf Ag Mechanically stable pharmaceutical dosage forms containing liquid or semi-solid surface-active substances
US6982281B1 (en) * 2000-11-17 2006-01-03 Lipocine Inc Pharmaceutical compositions and dosage forms for administration of hydrophobic drugs
FR2795961B1 (en) 1999-07-09 2004-05-28 Ethypharm Lab Prod Ethiques PHARMACEUTICAL COMPOSITION CONTAINING MICRONIZED FENOFIBRATE, A SURFACTANT AND A BINDING CELLULOSIC DERIVATIVE AND PREPARATION METHOD
US7863331B2 (en) 1999-07-09 2011-01-04 Ethypharm Pharmaceutical composition containing fenofibrate and method for the preparation thereof
CA2280925A1 (en) 1999-07-29 2001-01-29 Bernard Charles Sherman Stabilized cefuroxime axetil
DE60020382T2 (en) * 1999-09-21 2006-01-26 Skyepharma Canada Inc., Verdun SURFACE-MODIFIED PARTICULATE COMPOSITIONS OF BIOLOGICALLY ACTIVE SUBSTANCES
ATE329579T1 (en) 1999-11-12 2006-07-15 Abbott Lab SOLID DISPERSION WITH RITONAVIR, FENOFIBRATE OR GRISEOFULVIN
FR2803748A1 (en) * 2000-01-14 2001-07-20 Ethypharm Lab Prod Ethiques ITRACONAZOLE COMPOSITION AND PROCESS FOR PREPARATION
US7029700B2 (en) * 2000-01-14 2006-04-18 Brown University Research Foundation Micronized freeze-dried particles
AU2001231000A1 (en) 2000-01-19 2001-07-31 Pharmaceutical Discovery Corporation Dry powder formulations of antihistamine for nasal administration
IL134701A0 (en) 2000-02-23 2001-04-30 J P M E D Ltd Homogeneous solid matrix containing vegetable proteins
DE10026698A1 (en) * 2000-05-30 2001-12-06 Basf Ag Self-emulsifying active ingredient formulation and use of this formulation
US8586094B2 (en) 2000-09-20 2013-11-19 Jagotec Ag Coated tablets
FR2819720B1 (en) * 2001-01-22 2004-03-12 Fournier Lab Sa NEW FENOFIBRATE TABLETS
JP3386052B2 (en) * 2001-02-13 2003-03-10 トヨタ自動車株式会社 Pump device
AR033711A1 (en) * 2001-05-09 2004-01-07 Novartis Ag PHARMACEUTICAL COMPOSITIONS
MXPA03011935A (en) * 2001-06-22 2004-03-26 Pfizer Prod Inc Pharmaceutical compositions containing polymer and drug assemblies.
EP1401406A2 (en) * 2001-07-02 2004-03-31 Merrion Research I Limited Delivery of a bioactive material
CA2363376A1 (en) * 2001-11-16 2003-05-16 Bernard Charles Sherman Solid pharmaceutical compositions for oral administration comprising itraconazole
CA2479295A1 (en) * 2002-03-14 2003-09-25 Thomas C. Ho Progesterone oral drug delivery system
MXPA05000477A (en) * 2002-07-10 2005-03-23 Warner Lambert Co Combination of an allosteric inhibitor or matrix metalloproteinase-13 with a selective inhibitor of cyclooxygenase-2 that is not celecoxib or valdecoxib.
US20040010035A1 (en) * 2002-07-15 2004-01-15 Ciociola Arthur A. Gastrointestinal compositions
US6986901B2 (en) * 2002-07-15 2006-01-17 Warner-Lambert Company Llc Gastrointestinal compositions
US7039078B2 (en) * 2002-09-17 2006-05-02 Nippon Telegraph And Telephone Corporation Semiconductor optical modulator and laser with optical modulator
US20040086567A1 (en) * 2002-10-30 2004-05-06 Pawan Seth Bioequivalent composition of itraconazole and a hydrophilic polymer
US20040115287A1 (en) * 2002-12-17 2004-06-17 Lipocine, Inc. Hydrophobic active agent compositions and methods
WO2004105728A2 (en) * 2003-05-27 2004-12-09 Ranbaxy Laboratories Limited Solid dispersions of cefpodoxime proxetil and processes for their preparation
EP1648467B1 (en) 2003-07-17 2018-03-21 Janssen Sciences Ireland UC Process for preparing particles containing an antiviral
US8025899B2 (en) 2003-08-28 2011-09-27 Abbott Laboratories Solid pharmaceutical dosage form
US8377952B2 (en) 2003-08-28 2013-02-19 Abbott Laboratories Solid pharmaceutical dosage formulation
EP1675571A2 (en) * 2003-09-30 2006-07-05 Spherics, Inc. Nanoparticulate therapeutic biologically active agents
US20050220881A1 (en) * 2003-10-10 2005-10-06 Bvm Holding Co. Pharmaceutical composition
TW200533374A (en) * 2003-11-13 2005-10-16 Alza Corp Melt blend dispersions
GB2410748A (en) * 2004-02-03 2005-08-10 Johnson & Johnson Medical Ltd Medicated polyurethane foams
EP1625849A1 (en) * 2004-08-09 2006-02-15 Liconsa, Liberacion Controlada de Sustancias Activas, S.A. Pharmaceutical composition comprising drospirenone and ethynylestradiol
EP2112925A4 (en) * 2006-11-15 2013-01-09 Abbott Lab Solid pharmaceutical dosage formulations
WO2008104852A2 (en) * 2007-02-26 2008-09-04 Wockhardt Research Centre Pharmaceutical compositions comprising adsorbate of fenofibrate
FR2918277B1 (en) 2007-07-06 2012-10-05 Coretecholding NOVEL PROCESS FOR THE PRODUCTION OF HYDRODISPERSIBLE DRY PHARMACEUTICAL FORMS AND THE HYDRODISPERSIBLE COMPOSITIONS THUS OBTAINED
FR2932682B1 (en) 2008-06-23 2013-07-12 Bionetwork NOVEL PHARMACEUTICAL FORMS WITH RAPID EFFECT AND USES OF PHARMACEUTICAL COMPOSITIONS THUS OBTAINED.
US11304960B2 (en) 2009-01-08 2022-04-19 Chandrashekar Giliyar Steroidal compositions
US20180153904A1 (en) 2010-11-30 2018-06-07 Lipocine Inc. High-strength testosterone undecanoate compositions
US9034858B2 (en) 2010-11-30 2015-05-19 Lipocine Inc. High-strength testosterone undecanoate compositions
US9358241B2 (en) 2010-11-30 2016-06-07 Lipocine Inc. High-strength testosterone undecanoate compositions
US20120148675A1 (en) 2010-12-10 2012-06-14 Basawaraj Chickmath Testosterone undecanoate compositions
US9498485B2 (en) 2014-08-28 2016-11-22 Lipocine Inc. Bioavailable solid state (17-β)-hydroxy-4-androsten-3-one esters
US20170246187A1 (en) 2014-08-28 2017-08-31 Lipocine Inc. (17-ß)-3-OXOANDROST-4-EN-17-YL TRIDECANOATE COMPOSITIONS AND METHODS OF THEIR PREPARATION AND USE
CA3078723A1 (en) 2016-11-28 2018-05-31 Nachiappan Chidambaram Oral testosterone undecanoate therapy

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR385316A (en) 1907-12-11 1908-05-08 Louise De Santagnese Device for lifting patients
DE1053736B (en) 1956-03-02 1959-03-26 Konink Nl Gist & Spiritusfabri Process to increase the solubility of therapeutically active substances in water
FR84468E (en) 1963-07-10 1965-02-19 Piketty Freres Ets Washing process in particular for building material, such as millstone, agricultural products, mining products or others, as well as the apparatus for the implementation of this process and the products obtained by the application of the present process or similar process
DE2822882A1 (en) 1977-06-07 1978-12-21 Yamanouchi Pharma Co Ltd SOLID PREPARATION COMPOSITION CONTAINING NIFEDIPINE, METHOD FOR PRODUCING AND USING IT
EP0012523A1 (en) 1978-11-20 1980-06-25 American Home Products Corporation Therapeutic compositions with enhanced bioavailability and process for their preparation
EP0371471A1 (en) 1988-11-30 1990-06-06 Banyu Pharmaceutical Co., Ltd. Readily absorbable drug formulation of NB-818

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE385316A (en) *
FR2525108B1 (en) * 1982-04-19 1989-05-12 Elan Corp Ltd HIGH-SOLUBILITY MEDICINES AND PROCESS FOR OBTAINING THEM
JP2536876B2 (en) * 1987-07-31 1996-09-25 寛治 高田 Dissolvable powder formulation of cyclosporine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR385316A (en) 1907-12-11 1908-05-08 Louise De Santagnese Device for lifting patients
DE1053736B (en) 1956-03-02 1959-03-26 Konink Nl Gist & Spiritusfabri Process to increase the solubility of therapeutically active substances in water
FR84468E (en) 1963-07-10 1965-02-19 Piketty Freres Ets Washing process in particular for building material, such as millstone, agricultural products, mining products or others, as well as the apparatus for the implementation of this process and the products obtained by the application of the present process or similar process
DE2822882A1 (en) 1977-06-07 1978-12-21 Yamanouchi Pharma Co Ltd SOLID PREPARATION COMPOSITION CONTAINING NIFEDIPINE, METHOD FOR PRODUCING AND USING IT
EP0012523A1 (en) 1978-11-20 1980-06-25 American Home Products Corporation Therapeutic compositions with enhanced bioavailability and process for their preparation
EP0371471A1 (en) 1988-11-30 1990-06-06 Banyu Pharmaceutical Co., Ltd. Readily absorbable drug formulation of NB-818

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Chiou, W.I. and Riegelman, S. : Pharmaceutical applications of solid dispersion systems. J. Pharmaceutical sciences. vol. 60, pp. 1281-1302, 1971. *
Kassem, M.A.A. et al. : High energy states of Tolnaftate. Egypt. J. Pharm. Sci. vol. 33, pp. 267-281, 1992. *
Pharmaceuticals Article. vol. 116, 1992 p. 449 Derwent 89-088668 (1 page).

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9248136B2 (en) 2011-11-23 2016-02-02 Therapeuticsmd, Inc. Transdermal hormone replacement therapies
US8846648B2 (en) 2011-11-23 2014-09-30 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US8846649B2 (en) 2011-11-23 2014-09-30 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US10675288B2 (en) 2011-11-23 2020-06-09 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US8987237B2 (en) 2011-11-23 2015-03-24 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US11103516B2 (en) 2011-11-23 2021-08-31 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US11793819B2 (en) 2011-11-23 2023-10-24 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US8633178B2 (en) 2011-11-23 2014-01-21 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US9289382B2 (en) 2012-06-18 2016-03-22 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11166963B2 (en) 2012-06-18 2021-11-09 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US9012434B2 (en) 2012-06-18 2015-04-21 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US9301920B2 (en) 2012-06-18 2016-04-05 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US9006222B2 (en) 2012-06-18 2015-04-14 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US10052386B2 (en) 2012-06-18 2018-08-21 Therapeuticsmd, Inc. Progesterone formulations
US11529360B2 (en) 2012-06-18 2022-12-20 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US11865179B2 (en) 2012-06-18 2024-01-09 Therapeuticsmd, Inc. Progesterone formulations having a desirable PK profile
US11110099B2 (en) 2012-06-18 2021-09-07 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US8987238B2 (en) 2012-06-18 2015-03-24 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US11033626B2 (en) 2012-06-18 2021-06-15 Therapeuticsmd, Inc. Progesterone formulations having a desirable pk profile
US10806740B2 (en) 2012-06-18 2020-10-20 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US10471148B2 (en) 2012-06-18 2019-11-12 Therapeuticsmd, Inc. Progesterone formulations having a desirable PK profile
US8933059B2 (en) 2012-06-18 2015-01-13 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US10639375B2 (en) 2012-06-18 2020-05-05 Therapeuticsmd, Inc. Progesterone formulations
US10568891B2 (en) 2012-12-21 2020-02-25 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11266661B2 (en) 2012-12-21 2022-03-08 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US9180091B2 (en) 2012-12-21 2015-11-10 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US11622933B2 (en) 2012-12-21 2023-04-11 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US10806697B2 (en) 2012-12-21 2020-10-20 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10471072B2 (en) 2012-12-21 2019-11-12 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10835487B2 (en) 2012-12-21 2020-11-17 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10888516B2 (en) 2012-12-21 2021-01-12 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US11497709B2 (en) 2012-12-21 2022-11-15 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11351182B2 (en) 2012-12-21 2022-06-07 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11065197B2 (en) 2012-12-21 2021-07-20 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US11304959B2 (en) 2012-12-21 2022-04-19 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10537581B2 (en) 2012-12-21 2020-01-21 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11246875B2 (en) 2012-12-21 2022-02-15 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11116717B2 (en) 2012-12-21 2021-09-14 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US11123283B2 (en) 2012-12-21 2021-09-21 Therapeuticsmd, Inc. Soluble estradiol capsule for vaginal insertion
US11241445B2 (en) 2012-12-21 2022-02-08 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US11103513B2 (en) 2014-05-22 2021-08-31 TherapeuticsMD Natural combination hormone replacement formulations and therapies
US10206932B2 (en) 2014-05-22 2019-02-19 Therapeuticsmd, Inc. Natural combination hormone replacement formulations and therapies
US10258630B2 (en) 2014-10-22 2019-04-16 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10398708B2 (en) 2014-10-22 2019-09-03 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10668082B2 (en) 2014-10-22 2020-06-02 Therapeuticsmd, Inc. Vaginal inserted estradiol pharmaceutical compositions and methods
US10328087B2 (en) 2015-07-23 2019-06-25 Therapeuticsmd, Inc. Formulations for solubilizing hormones
US10912783B2 (en) 2015-07-23 2021-02-09 Therapeuticsmd, Inc. Formulations for solubilizing hormones
US10286077B2 (en) 2016-04-01 2019-05-14 Therapeuticsmd, Inc. Steroid hormone compositions in medium chain oils
US10532059B2 (en) 2016-04-01 2020-01-14 Therapeuticsmd, Inc. Steroid hormone pharmaceutical composition
US9931349B2 (en) 2016-04-01 2018-04-03 Therapeuticsmd, Inc. Steroid hormone pharmaceutical composition
US11633405B2 (en) 2020-02-07 2023-04-25 Therapeuticsmd, Inc. Steroid hormone pharmaceutical formulations

Also Published As

Publication number Publication date
FR2722984A1 (en) 1996-02-02
US5776495A (en) 1998-07-07
WO1997004749A1 (en) 1997-02-13
FR2722984B1 (en) 1996-10-18
EP0761208A1 (en) 1997-03-12

Similar Documents

Publication Publication Date Title
USRE39104E1 (en) Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions
US6027747A (en) Process for the production of dry pharmaceutical forms and the thus obtained pharmaceutical compositions
US9107832B2 (en) Risperidone microparticles formed by sublimation
AU612591B2 (en) Pharmaceutical formulations comprising microcapsules
AU782282B2 (en) Pharmaceutical composition containing fenofibrate and preparation method
US5183662A (en) Controlled drug release composition
AU752552B2 (en) 2-methyl-thieno-benzodiazepine formulation
US4344934A (en) Therapeutic compositions with enhanced bioavailability
EP0012523A1 (en) Therapeutic compositions with enhanced bioavailability and process for their preparation
US11344503B2 (en) Cariprazine release formulations
JPH10505574A (en) Method for producing dry preparation and pharmaceutical composition obtained by this method
JP5134818B2 (en) Method for the manufacture of lipid controlled drug formulations
TR2021002085A2 (en) A film coated tablet of apixaban
NZ546777A (en) Drug microparticles

Legal Events

Date Code Title Description
FPAY Fee payment

Year of fee payment: 12