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
  • A61K9/10—Dispersions; Emulsions
  • A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
  • A61K9/1075—Microemulsions or submicron emulsions; Preconcentrates or solids thereof; Micelles, e.g. made of phospholipids or block copolymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K38/00—Medicinal preparations containing peptides
  • A61K38/04—Peptides having up to 20 amino acids in a fully defined sequence; Derivatives thereof
  • A61K38/12—Cyclic peptides, e.g. bacitracins; Polymyxins; Gramicidins S, C; Tyrocidins A, B or C
  • A61K38/13—Cyclosporins
• • 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
  • A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
  • A61K9/4841—Filling excipients; Inactive ingredients
  • A61K9/4858—Organic compounds

Definitions

• the present invention relates to new pharmaceutical formulations which contain a poorly water-soluble active ingredient from the class of the cyclosporins.
• the cyclosporins comprise a class of cyclic poly-N-methylated undecapeptides, the representatives of which have pharmacological properties, in particular immunosuppressive, anti-inflammatory and / or antiparasitic properties.
• the best-known representative of this class is cyclosporin A, which is the active ingredient of the commercial preparations SANDIMMUN and NEORAL is.
• cyclosporins are neutral lipophilic (ie hydrophobic) substances with low water solubility. Cyclosporine formulations, for example for oral administration, were based primarily on the use of ethanol and oils or similar auxiliaries as carrier media. According to the Journal of Drug Targeting, 1998, Vol. 5, No.
• the commercial preparation SANDIMMUN is available in three different forms, namely soft gelatin capsules containing cyclosporin A, anhydrous ethyl alcohol (up to 12.7%), Labrafil M 2125 CS (polyoxyethylated glycolized glycerides), corn oil and other ingredients; an oral solution containing cyclosporin A, ethyl alcohol (up to 12.5%), olive oil, Labrafil M 1944 CS (polyoxyethylated oleic acid glycerides) and other ingredients; and an injectable preparation containing cyclosporin A, ethyl alcohol (32.9%) and Cremophor EL (polyethoxylated castor oil); and the commercial preparation NEORAL in two forms, namely Soft gelatin capsules containing cyclosporin A, anhydrous ethyl alcohol (up to 9.5%), corn oil glycerides, Cremophor RH 40 (polyoxyethoxyeth
• Cyclosporin as an active ingredient a hydrophilic phase, namely a pharmaceutically acceptable C 1 -C 5 alkyl or
• 1,2 propylene glycol 1,2 propylene glycol; a lipophilic phase; and contain a surfactant.
• the hydrophilic phase can also contain other components, for example lower alkanols, such as ethanol.
• Formulations are known from WO 99/00002 A which contain a cyclosporin as active ingredient; a polycarboxylic acid ester and / or a polyolcarboxylic acid ester; an oil; and contain a surfactant.
• Acetyl triethyl citrate and in the case of the polyol carboxylic acid esters, esterification products of polyols with 2-10, preferably
• 3-5 hydroxyl groups with C 2 -C carboxylic acids, such as triacetin.
• Binary formulations are known from WO 98/40051 A which contain a cyclosporin as active ingredient; a lipophilic phase, for example a fatty acid triglyceride, in particular caprylic / capric acid triglyceride; and a surfactant such as a polyoxyethylene derivative of a natural or hydrogenated vegetable oil or a polyoxyethylene sorbitan fatty acid ester.
• the formulations according to the present invention are microemulsion preconcentrates or microemulsions.
• a microemulson preconcentrate is understood to mean a system which, on contact with water, e.g. when added to water, a microemulsion results.
• a microemulsion is, in the conventionally recognized sense, a non-opaque or practically non-opaque colloidal dispersion which contains water and organic components including lipophilic (i.e. hydrophobic) components.
• Microemulsions can be recognized by having one or more of the following properties: they are formed spontaneously when their components are brought into contact with one another; practically no energy is required for this, and the formation of such microemulsions therefore takes place without heating or using a high shear force or any other substantial mixing.
• microemulsions contain droplets or particles with a maximum dimension, for example a diameter, of less than 150 nm, usually about 10-100 nm.
• microemulsion preconcentrates according to the invention are accordingly galenic systems which contain a poorly water-soluble therapeutic active ingredient from the cyclosporine class and spontaneously or practically spontaneously when combined with water, i.e. are able to form a microemulsion without significant energy input.
• Carboxylic acids in particular essentially free of diethylene glycol monomethyl ether, glycofurol, 1,2-propylene glycol, triethyl citrate, tributyl citrate, acetyl tributyl citrate, acetyl triethyl citra, triacetin, ethanol, polyethylene glycol, dimethyl isosorbide and propylene carbonate.
• component (a) of the microemulsion preconcentrates according to the invention contains, in addition to a medium-chain triglyceride, an omega-9 fatty acid and / or an omega-6 fatty acid, and this is surprisingly a particularly pronounced one Stability of the microemulsion preconcentrates and microemulsions according to the invention, which is of crucial importance for their commercial usability.
• a medium-chain fatty acid triglyceride expediently a fatty acid triglyceride in which the fatty acid residues have 4 to 18, preferably 6 to 18, carbon atoms and an omega-9 and / or an omega-6 fatty acid are suitable as component (a). These substances are immiscible with water or are insoluble or practically insoluble in water and have no or practically no surface-active function.
• Preferred medium-chain fatty acid triglycerides are caprylic
• Capric acid triglycerides as are known for example under the trade name MIGLYOL and are commercially available (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, pages 808 to 809, 1989). These include, for example, the following products:
• MIGLYOL 810 This is a fractionated coconut oil that contains triglycerides of caprylic acid and capric acid and has a molecular weight of approximately 520. It has a fatty acid composition with C 6 at most 2 percent, C ⁇ about 65 to 75 percent, C 10 about 25 to 35 percent and C 12 at most 2 percent.
• caprylic acid triglycerides of caprylic acid, capric acid and linoleic acid with a molecular weight of about 510. It has a fatty acid composition with a maximum of 6 percent C 6 , about 8 to 45 percent C 60, about 25 to 40 percent C 10 , about 2 percent C 12 up to 5 percent and C 18: 2 about 4 to 6 percent percent.
• triglycerides of caprylic acid and capric acid as are known and available under the trademark MYRITOL (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, page 834, 1989). This includes, for example, the MYRITOL 813 product.
• Suitable products in this class are CAPTEX 355, CAPTEX 300, CAPTEX 800, CAPMUL MCT, NEOBEE M5 and MAZOL 1400.
• Suitable omega-9 fatty acids are mainly those with 12-24, in particular 16-24, preferably 18-22 carbon atoms, for example oleic acid and eicosatrienoic acid. Oleic acid is particularly preferred.
• Suitable omega-6 fatty acids are mainly those with 12-24, in particular 16-24, preferably 18-22 carbon atoms, for example linoleic acid, gamma-linolenic acid, dihommo-gamma-linolenic acid and arachidonic acid. Linoleic acid is particularly preferred.
• a mixture consisting of a caprylic / capric acid triglyceride, oleic acid and / or linoleic acid is used as component (a).
• Component (b), the poorly water-soluble, but soluble in component (a) therapeutic active ingredient from the class of the cyclosporins is preferably cyclosporin A; however, another suitable cyclosporin can also be used, for example another natural cyclosporin, one of the various unnatural cyclosporin derivatives or a synthetic cyclosporin.
• Component (c) the surface-active component containing a surfactant of the polyoxethylene type, can be a hydrophilic surface-active agent or a lipophilic surface-active agent, but mixtures of such agents can also be used.
• Reaction products of natural or hydrogenated vegetable oils and ethylene glycol namely polyoxyethylene glycolated natural or hydrogenated vegetable oils, such as polyoxyethylene glycolated natural or hydrogenated castor oils.
• the various surfactants that are available under the name are particularly suitable CREMOPHOR are known and available (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, pages 326 to 327, 1989), especially the products with the designations CREMOPHOR RH 40, CREMOPHOR RH 60 and CREMOPHOR EL.
• the various surfactants known and available under the name NIKKOL are also suitable as such products, for example NIKKOL HCO-60.
• Polyoxyethylene sorbitan fatty acid esters for example the mono- and trilaury esters, the mono- and
• TWEEN 40 polyoxyethylene (20) sorbitan monopalmitate
• TWEEN 80 polyoxyethylene (20) sorbitan monooleate
• TWEEN 65 polyoxyethylene (20) sorbitan tristearate
• TWEEN 85 polyoxyethylene (20) sorbitan trioleate
• TWEEN 21 polyoxyethylene (4) sorbitan monolaurate
• TWEEN 61 polyoxyethylene (4) sorbitan monostearate
• TWEEN 81 polyoxyethylene (4) sorbitan monoolea.
• TWEEN 80 is particularly preferred.
• Polyoxyethylene fatty acid esters for example the polyoxyethylene stearic acid esters known and available commercially under the name MYRJ (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, page 834, 1989), in particular the product MYRJ 52, and also the polyoxyethylene fatty acid esters known and available under the name CETIOL HE ( Fiedler, Lexikon der Hilfsstoff, 3rd edition, page 284, 1989).
• Copolymers of polyoxyethylene and polyoxypropylene such as those under the names PLURONIC and EMKALYX are known and available (Fiedler, Lexicon of auxiliary materials, 3rd edition, pages 956 to 958, 1989), in particular the product PLURONIC F68.
• Block copolymers of polyoxyethylene and polyoxypropylene as are known and available, for example, under the name POLOXAMER (Fiedler, Lexikon der Hilfsscher, 3rd edition, page 959, 1989), in particular the product POLOXAMER 188.
• Polyethoxylated vitamin E derivatives in particular the product VITAMIN E TPGS (d-Alpha Tocoperyl Polyethylene Glycol 1000 Succinate, Eastman).
• Polyethoxylated hydroxy fatty acid esters in particular the product SOLUTOL HS 15 (polyoxyethylene 660 hydroxystearate, BASF).
• Vegetable oil glycerides and polyethylene polyols include transesterification products from various, for example non-hydrogenated, vegetable oils such as corn oil, kernel oil, almond oil, peanut oil, olive oil and palm oil, and from mixtures thereof with polyethylene glycols, in particular with those which have an average molecular weight of 200-800.
• transesterification products are known and available under the name LABRAFIL (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, page 707, 1989); the LABRAFIL M 1944 CS and LABRAFIL M 2130 CS products are particularly suitable.
• Ethylene oxide adducts of sterols and derivatives thereof for example cholesterol and derivatives thereof, such as products derived from sitosterol, campesterol, or stigmasterol, for example soy sterols and derivatives thereof (Fiedler, Lexikon der Hilfsstoff, 3rd edition, pages 554 and 555, 1989), as they are known and available under the names GENEROL, in particular the products GENEROL 122 E5, 122 E10 and 122 E25.
• microemulsion preconcentrates according to the invention comprise both systems which contain a single surface-active agent and systems which contain a mixture of two or more surface-active agents, for example TWEEN 80 + CREMOPHOR RH 40, TWEEN 80 + CREMOPHOR RH 40 + VITAMIN E TPGS etc ,
• a surface-active component which contains a polyoxyethylene sorbitan fatty acid ester, a polyoxyethylene-glycolated natural or hydrogenated vegetable oil or mixtures thereof.
• microemulsion preconcentrates according to the invention can also contain other substances, such as e.g. Antioxidants, thickeners, fragrances and / or flavors, colors, etc.
• Suitable antioxidants are, for example, ascorbyl palmitate, butylated hydroxyanisole (BHA),
• BHT Butylated hydroxytoluene
• tocopherols e.g. B. D
• L-alpha-tocopherol vitamin E
• Polyacrylate resins and copolymeric polyacrylate resins such as are known and available, for example, under the names CARBOPOL and EUDRAGIT (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, pages 254 to 256 and 486 to 487, 1989), in particular the products CARBOPOL 934, 940 and 941 or EUDRAGIT E, L, S, RL and RS.
• Celluloses and cellulose derivatives such as methyl cellulose, ethyl cellulose, propyl cellulose,
• Hydroxypropylmethyl cellulose phthalate and salts thereof are the products known and available under the names KLUCEL and METHOCEL (Fiedler, Lexikon der Hilfsstoffe, 3rd edition, pages 688 and 790, 1989), in particular the products KLUCEL LF, MF, GF and HF and METHOCEL K 100 , K 15M, K 100M, E 5M, E 15, E 15M and E 100M.
• Polyvinyl pyrrolidones including, for example, poly-N-vinyl pyrrolidones and
• Vinylpyrrolidone copolymers such as vinylpyrrolidone-vinyl acetate copolymers.
• Examples of such products are known and available under the name KOLLIDON (also referred to in the USA as POVIDONE) (Fiedler, Lexikon der Hilfsstoff, 3rd edition, pages 694 to 696, 1989), in particular the products KOLLIDON 30 and 90.
• Polyvinyl resins including, for example, polyvinyl acetates and polyvinyl alcohols, and also other polymeric materials, such as gum tragacanth, gum arabic, and alginates, for example alginic acid and salts thereof, such as sodium alginate.
• Inorganic thickeners such as attapulgite, bentonite and silicates, including hydrophobic silicas, such as alkylated, for example methylated, silica gels, in particular colloidal silicas, as are known and available under the name AEROSIL (Handbook of Pharmaceutical Excipients, publisher American Pharmaceutical Association / The Pharmaceutical Society of Great Britain, pages 253 to 256, 1986), in particular the products AEROSIL 130, 200, 300, 380, 0, OX 50, TT 600, MOX 80, MOX 170, LK 84 and the methylated AEROSIL R 972.
• AEROSIL Hydrophobic silicas, such as alkylated, for example methylated, silica gels, in particular colloidal silicas, as are known and available under the name AEROSIL (Handbook of Pharmaceutical Excipients, publisher American Pharmaceutical Association / The Pharmaceutical Society of Great Britain, pages 253 to 256, 1986), in particular the products AEROSIL 130, 200, 300,
• compositions according to the invention can also provide pharmaceutical compositions which comprise a therapeutic active ingredient which is sparingly soluble in water but soluble in component (a) the class of cyclosporins and which are themselves microemulsions; In these microemulsions, the active ingredient is stably solubilized, with no precipitates being observed over several weeks.
• microemulsions obtained, for example, by diluting the microemulsion preconcentrates according to the invention with water or an aqueous medium can be used directly as drinking formulations.
• compositions in which further auxiliaries may be present also contain water, so that an aqueous microemulsion results in the form of a spray, gel, paste, cream, injection solution, infusion solution or the like ,
• Such pharmaceutical compositions in the form of microemulsions are also new and the subject of the present invention.
• component (b) a water-insoluble, but soluble in component (a) therapeutic agent from the class of the cyclosporins; and (c) a surfactant component containing a polyoxethylene type surfactant; which, however, is essentially free of the following water-miscible or water-soluble components: or tetrahydrofurfuryl diether or partial ether of low molecular weight mono- or polyoxy-C 2 -C 12 alkanediols;
• the O / W type (oil-in-water) microemulsions according to the invention have stability properties as described above in connection with microemulsions, i.e. in particular, that the active ingredient in these microemulsions is stably solubilized and that no precipitate can be observed for several weeks.
• the particle size of these microemulsions is less than 150 nm, preferably less than 100 nm.
• compositions of the microemulsion preconcentrates and the microemulsions according to the invention can be used for administration in any suitable manner, for example orally in a unit dosage form, such as a soft or hard gelatin capsule; parenterally or topically, for example for use on the skin, such as a spray, cream, paste, lotion, gel, ointment, poultice, cataplasm, plaster, Skin patch and the like; or for ophthalmic use, for example in the form of eye drops, eye lotions or eye gels.
• Easily flowing forms can also be used, for example, for intralesional injection to treat psoriasis or administered rectally, for example as an enema for the treatment of inflammatory diseases of the intestine or Crohn's disease.
• the microemulsions according to the invention are primarily intended for oral, parenteral or topical use, and in the case of topical use, use on the skin is particularly suitable.
• a preferred embodiment of a microemulsion preconcentrate according to the invention which is intended for oral administration is characterized in that it (a) is a mixture consisting of a medium-chain triglyceride and an omega-9 fatty acid and / or an omega-6 fatty acid; (b) a water-insoluble, but soluble in component (a) therapeutic agent from the class of the cyclosporins; and (c) a surfactant component comprising a polyoxyethylene sorbitan fatty acid ester and / or a polyoxyethylene glycolated natural or hydrogenated vegetable oil; contains and that it is essentially free of the following water-miscible or water-soluble components: C 1 -C 5 alkyl- or tetrahydrofurfuryl-diether or partial ether of low molecular weight mono- or polyoxy-C 2 -C 12 -alkanediols; 1,2 propylene glycol; lower alkanols;
• Esterification products of polycarboxylic acids with 2-10 in particular 3-5 carboxyl groups with ⁇ -C 1C alcohols; and Esterification products of polyols with 2-10, especially 3-5 carboxyl groups with C 2 - C ⁇ i -
• This microemulsion preconcentrate is in contact with water or an aqueous medium.
• Microemulsion with an average particle size of less than 150 nm, preferably less than 100 nm can form.
• microemulsion preconcentrates and microemulsions according to the invention which are intended for topical, in particular dermal, use additionally contain one or more of the following components:
• Solid hydrocarbons for example petroleum gels, such as white petrolatum or VASELINE, ceresin and solid paraffins, and also waxes, including animal, vegetable and synthetic waxes, such as spermaceous wax, carnauba wax and beeswax.
• Liquid hydrocarbons for example liquid paraffins, and fatty acid esters such as isopropyl myristate and cetyl palmitate.
• Non-volatile silicones including silicone oils and silicone pastes, as well as copolymers of silicone and polyalkylene oxide (Fiedler, lexicon of auxiliary substances,
• emulsions can be obtained in liquid or semi-solid form, which depends, for example, on the needs desired for topical application.
• compositions intended for topical, in particular dermal use expediently additionally contain an antioxidant, such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and
• an antioxidant such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and
• Tocopherols e.g. B. D, L-alpha-tocopherol (vitamin E); an antibacterial agent such as benzyl alcohol,
• Methyl paraben, propyl paraben, benzalkonium chloride Methyl paraben, propyl paraben, benzalkonium chloride
• Benzoic acid, sorbic acid or chlorobutanol a stabilizer, such as microcrystalline starch,
• Sodium EDTA, or magnesium sulfate an agent for improving skin penetration, for example l-dodecylazacycloheptan-2-one, which is also known as AZON (Fiedler, Lexikon der).
• component (b) a water-insoluble, but soluble in component (a) therapeutic agent from the class of the cyclosporins;
• microemulsion preconcentrates according to the invention can be prepared by intimately mixing the individual constituents, if appropriate with heating.
• the microemulsion preconcentrates can also be prepared by dissolving component (b) in component (a) with stirring, if appropriate with heating, and adding component (c) to the resulting solution with further stirring.
• microemulsions according to the invention can be prepared from the microemulsion preconcentrates by dilution with water or other aqueous liquids.
• Microemulsion preconcentrates according to the invention which are suitable for oral administration are expediently present in unit dosage form, e.g. in a soft or hard gelatin capsule, and they expediently contain 0.5 to 20, preferably 5 to 15
• Microemulsion preconcentrates according to the invention which are suitable for topical or parenteral use, expediently contain 0.01 to 15 percent by weight of a sparingly water-soluble component (a) soluble therapeutic agent from the class of cyclosporins.
• the quantitative ratio of omega-9 fatty acid and / or omega-6 fatty acid to the active ingredient is at least 1: 2, preferably at least 1: 1.
• compositions according to the invention are further illustrated by the following examples.
• Examples 1.1 to 1.22 show the preparation of compositions in oral unit dosage forms which are suitable, for example, for preventing transplant rejection or for treating autoimmune diseases.
• Examples 2.1 to 2.4 show the preparation of compositions for topical application which are suitable, for example, for the treatment of atopic dermatitis or contact dermatitis, psoriasis, hair loss or certain eye disorders such as conjunctivitis, uveitis or keratitis.
• Example 3.1 shows the preparation of a composition for parenteral use, which is suitable, for example, for preventing rejection of grafts.
• Example 1 Preparation of oral cyclosporin A dosage forms of the microemulsion preconcentrate type
• Miglyol 812 (al) 35.00% oleic acid (a2) 10.00%
• Cremophor RH 40 (c2) 11.25% The cyclosporin A is dissolved in components al and a2 with stirring at room temperature, and the components cl and c2 are added to the resulting solution with further stirring.
• the microemulsion preconcentrate formed is filled into a soft or hard gelatin capsule. Hard gelatin capsules are preferably sealed using the quasi-seal method.
• the microemulsion preconcentrate can also be filled into a dispenser.
• the patient prepares an oral drinking solution of the type 0 / W microemulsion by appropriate dilution using water or another aqueous liquid from the microemulsion preconcentrate.
• compositions can also be prepared in an analogous manner and filled into capsules or dispensers.
• Miglyol 812 (al) 27.50% oleic acid (a2) 17.50%
• Miglyol 812 (al) 35.00% linoleic acid (a2) 10.00%
• Miglyol 812 (al) 30.00% linoleic acid (a2) 15.00%
• Vitamin E TPGS (c3) 10.00%
• Miglyol 812 (al) 30.00% linoleic acid (a2) 15.00%
• Cremophor RH 40 10.00% Labrafil M 1944 CS (c3) 10.00%
• Miglyol 812 (al) 30.00% oleic acid (a2) 15.00%
• compositions of the above kind are mixed with water or another aqueous medium e.g. diluted to 1: 100, microemulsions are formed which, in the case of representative examples, have the following particle sizes:
• the particle diameter and particle size distribution are determined by laser light scattering (Nicomp 370 Submicron Particle Sizer, Volume weighting).
• the table below shows that in the case of representative examples, the cycolosporin A microemulsions formed from the microemulsion preconcentrates have excellent storage stability in terms of particle size and distribution. Furthermore, no cyclosporin A precipitates can be observed during this storage.
• the particle diameter and particle size distribution are determined by laser light scattering (Nicomp 370 Submicron Particle Sizer, Volume weighting).
• Example 2 Preparation of topically applicable cyclosporin A forms of the microemulsion type
• microemulsion preconcentrates described in Examples 1.1 to 1.22 subsequently serve as the basis for the production of sprays, gels, creams and other topical dosage forms by combining them with other additives such as water, thickeners and the like.
• microemulsion preconcentrate is added to the phosphate buffer containing Na 2 EDTA and benzalkonium chloride with stirring at room temperature.
• the resulting cyclosporin AO / W microemulsion is filled into a pump spray.
• compressed gas or aerosol sprays can also be used.
• Example 2.2 Cyclosporin A 0.25% hydrogel
• microemulsion preconcentrate is added with stirring to the phosphate buffer containing Na 2 EDTA and benzalkonium chloride.
• the resulting cyclosporin AO / W microemulsion is processed and made up in the usual way with the sodium carboxymethyl cellulose to form the hydrogel.
• microemulsion preconcentrate is added to the water phase with stirring at room temperature.
• the resulting cyclosporin AO / W microemulsion is processed and packaged in a customary manner with the oil phase to form the O / W emulsion.
• the microemulsion preconcentrate is added to the sodium phosphate buffer containing Na 2 EDTA and benzalkonium chloride with stirring at room temperature.
• the resulting Cyclosporin AO / W microemulsion is sterile filtered 0.2 ⁇ m and filled into pipette bottles or other common containers.
• Example 3 Preparation of parenterally applicable cyclosporin A forms of the microemulsion type
• microemulsion preconcentrates described in Examples 1.1 to 1.22 can serve as the basis for the preparation of injection or infusion solutions by diluting them appropriately with other additives, such as physiological saline or 5% glucose solution and the like.
• Example 3.1 Cyclosporin A 0.25% solution for infusion microemulsion preconcentrate according to Example 1.19 2.50% 5% glucose solution ad 100.00%
• microemulsion preconcentrate is added to the glucose solution with stirring at room temperature.
• the resulting cyclosporin A O / W microemulsion is sterile filtered 0.2 ⁇ m and filled into customary sterile containers.

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