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US20130178467A1 - Highly concentrated stable meloxicam solutions - Google Patents

Highly concentrated stable meloxicam solutions Download PDF

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Publication number
US20130178467A1
US20130178467A1 US13/803,008 US201313803008A US2013178467A1 US 20130178467 A1 US20130178467 A1 US 20130178467A1 US 201313803008 A US201313803008 A US 201313803008A US 2013178467 A1 US2013178467 A1 US 2013178467A1
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US
United States
Prior art keywords
meloxicam
solution
salt
treatment method
sodium
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.)
Abandoned
Application number
US13/803,008
Inventor
Stefan Henke
Bernd Kruss
Bernhard Hassel
Hans-Juergen Kroff
Martin A. FOLGER
Klaus Daneck
Axel Prox
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.)
Boehringer Ingelheim Vetmedica GmbH
Original Assignee
Boehringer Ingelheim Vetmedica GmbH
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
Priority claimed from DE10030345A external-priority patent/DE10030345A1/en
Application filed by Boehringer Ingelheim Vetmedica GmbH filed Critical Boehringer Ingelheim Vetmedica GmbH
Priority to US13/803,008 priority Critical patent/US20130178467A1/en
Publication of US20130178467A1 publication Critical patent/US20130178467A1/en
Priority to US15/297,594 priority patent/US9956288B2/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/16—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing nitrogen, e.g. nitro-, nitroso-, azo-compounds, nitriles, cyanates
    • A61K47/18—Amines; Amides; Ureas; Quaternary ammonium compounds; Amino acids; Oligopeptides having up to five amino acids
    • A61K47/183—Amino acids, e.g. glycine, EDTA or aspartame
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/54—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame
    • A61K31/5415—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame ortho- or peri-condensed with carbocyclic ring systems, e.g. phenothiazine, chlorpromazine, piroxicam
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • 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
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
    • 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
    • A61K9/0087—Galenical forms not covered by A61K9/02 - A61K9/7023
    • A61K9/0095—Drinks; Beverages; Syrups; Compositions for reconstitution thereof, e.g. powders or tablets to be dispersed in a glass of water; Veterinary drenches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
    • A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin

Definitions

  • the present invention relates to highly concentrated stable meloxicam solutions for oral and parenteral administration, particularly for treating respiratory diseases in large farm animals.
  • Meloxicam (4-hydroxy-2-methyl-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide) is an active substance which belongs to the group of NSAIDs (non-steroidal antiinflammatory drugs).
  • NSAIDs non-steroidal antiinflammatory drugs.
  • Meloxicam and the sodium and meglumine (N-methyl-D-glucamine) salt thereof are described in EP-A-0 002 482.
  • EP-A-0 002 482 shows, inter alia, the example of a 0.2% injectable solution of meloxicam consisting of the meglumine salt of the active substance, sodium chloride, and water.
  • EP-A-0 945 134 discloses the pH-dependent solubility characteristics of meloxicam and its salts, i.e., the sodium salt, the ammonium salt, and the meglumine salt, in aqueous solution.
  • meloxicam is an active substance which does not dissolve readily in water and the meloxicam salts, particularly the meglumine salt, exhibit improved solubility as the pH increases between 4 and 10, as shown in Table 1 of EP-0 945 134.
  • Table 1 of EP-0 945 134 shows that it has only been possible to produce stable, clear, aqueous solutions with a low concentration of meloxicam.
  • W09959634 A1 describes an eye drop solution containing 0.5% meloxicam but makes no reference to possible meloxicam concentrations over 1%.
  • a commercially available 0.5% meloxicam solution is used in small animals such as dogs, heifers, and calves to treat respiratory diseases.
  • meloxicam solutions which contain, in addition to a meloxicam salt and certain excipients, another excipient selected from among citric acid, lecithin, gluconic acid, tartaric acid, phosphoric acid, and EDTA or the salts thereof, may be produced so as to be particle-free and stable over long periods.
  • the stability was achieved with an unexpectedly small amount of organic solubilizers.
  • the formulation was found to be stable even when subjected to the process of final sterilization.
  • a formulation of a meloxicam solution which contains, in addition to a meloxicam salt, small concentrations of solubilizer, a preservative, a buffer substance for achieving the optimum pH range, and another excipient.
  • the invention relates to aqueous cyclodextrin-free solutions of meloxicam for parenteral or oral administration which contain a pharmacologically acceptable meloxicam salt of an organic or inorganic base in a highly concentrated solution with 11-25 mg/mL of meloxicam together with suitable excipients.
  • the formulation according to the invention overcomes the problem arising from the prior art of providing an injectable solution of the active substance meloxicam which is also suitable for treating large farm animals, by permitting a high concentration of active substance in a particle free solution which is stable over the long term, having the composition described hereinafter.
  • the formulation according to the invention may contain, as the meloxicam salt, the meglumine, sodium, potassium, or ammonium salt, preferably the meloxicam meglumine salt.
  • the solubilizers used may be, for example, polyethyleneglycols, polyoxyethylene-polyoxypropylene copolymers (e.g., Poloxamer 188), glycofurol, arginine, lysine, castor oil, propyleneglycol, solketal, polysorbate, glycerol, sorbitol, mannitol, xylitol, polyvinylpyrrolidone, lecithin, cholesterol, 12-hydroxystearic acid-PEG660-ester, propyleneglycol monostearate, polyoxy-40-hydrogenated castor oil, polyoxyl-10-oleyl-ether, polyoxyl-20-cetostearylether, and polyoxyl-40-stearate or a mixture of sorbitol, mannitol and xylitol, preferably polyethyleneglycols, polyoxyethylene-polyoxypropylene copolymers, glycofurol, polyvinylpyrrolidone,
  • polyethyleneglycols particularly preferred are polyethyleneglycols, glycofurol, and polyoxyethylene-polyoxypropylene-copolymers, but especially polyethyleneglycols (e.g., Macrogol 300) and polyoxyethylene-polyoxypropylene copolymers (e.g., Poloxamer 188).
  • polyethyleneglycols e.g., Macrogol 300
  • polyoxyethylene-polyoxypropylene copolymers e.g., Poloxamer 188.
  • the preservatives used may be, for example, ethanol, benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, chlorobutanol, benzyl alcohol, phenylethanol, the methyl, ethyl, propyl, or butyl p-hydroxybenzoates, phenol, m-cresol, p-chloro-m-cresol, or benzalkonium chloride.
  • ethanol benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, chlorobutanol, benzyl alcohol, phenylethanol, and the methyl, ethyl, propyl, or butyl p-hydroxybenzoates, but preferably ethanol, benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, but especially ethanol.
  • the buffer system used to achieve a pH of between 8 and 10 may be, for example, glycine, a mixture of glycine and HCl, a mixture of glycine and sodium hydroxide solution, and the sodium and potassium salts thereof, a mixture of potassium hydrogen phthalate and hydrochloric acid, a mixture of potassium hydrogen phthalate and sodium hydroxide solution, or a mixture of glutamic acid and glutamate.
  • Glycine, a mixture of glycine and HCl, and a mixture of glycine/sodium hydroxide solution, especially glycine are particularly preferred.
  • excipients are citric acid, lecithin, gluconic acid, tartaric acid, phosphoric acid, and EDTA or the alkali metal salts thereof, preferably tartaric acid and EDTA or the alkali metal salts thereof, particularly disodium EDTA.
  • One embodiment of the invention contains, in addition to the meglumine or sodium salt of meloxicam, polyethyleneglycols, glycofurol and/or polyoxyethylene-polyoxypropylene copolymers, but particularly polyethyleneglycols (e.g., Macrogol 300) and/or polyoxyethylene-polyoxypropylene copolymers (e.g., Poloxamer 188) as solubilizer, ethanol, benzoic acid and the sodium or potassium salts thereof, or sorbic acid and the sodium or potassium salts thereof, but particularly ethanol, as preservative, and glycine, a mixture of glycine/HCl, or a mixture of glycine/sodium hydroxide solution, but preferably glycine, as buffer, and disodium EDTA as an additional excipient.
  • polyethyleneglycols e.g., Macrogol 300
  • polyoxyethylene-polyoxypropylene copolymers e.g., Poloxamer 188 as
  • the formulation according to the invention may contain meloxicam in a concentration of 11-25 mg/mL, preferably 13-24 mg/mL, preferably 16-23 mg/mL, particularly preferably 18-22 mg/mL, and especially 20 mg/mL.
  • the meglumine concentration may be between 12.5 and 16.5 mg/mL, preferably 13-16 mg/mL, preferably 13.5-15.5 mg/mL, more preferably 14-15 mg/mL, and especially about 14 mg/mL.
  • the possible sodium, potassium, and ammonium concentrations are calculated accordingly.
  • the concentration of the solubilizers may be in the range from 20-200 mg/mL, preferably 30-150 mg/mL, preferably 40-130 mg/mL, more preferably 50-120 mg/mL, and especially 70-100 mg/mL.
  • the concentration of the preservative ethanol may be in the range from 100-200 mg/mL, preferably 120-180 mg/mL, and more preferably about 150 mg/mL.
  • the concentration of the preservatives benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, chlorobutanol, benzyl alcohol, phenylethanol, phenol, m-cresol, and p-chloro-m-cresol may be in the range from 0.5-50 mg/mL, preferably 1-10 mg/mL, and more preferably 3-5 mg/mL.
  • the concentration of the preservatives benzalkonium chloride, phenylmercury nitrate, and methyl, ethyl, propyl, or butyl-p-hydroxybenzoates may be in the range from 0.01-4 mg/mL, preferably 0.02-3 mg/mL, and more preferably 0.1-0.5 mg/mL.
  • the concentration of the buffer substances may be between 4 and 50 mg/mL, preferably between 5 and 20 mg/mL, and more preferably between 8 and 10 mg/mL.
  • the concentration of the other excipients mentioned above may be in the range from 0.2-3 mg/mL, preferably 0.3-2.5 mg/mL, preferably 0.5-2 mg/mL, most preferably 0.6-1.5 mg/mL, and in particular 0.7-1.0 mg/mL.
  • Meglumine and meloxicam may be used in a molar ratio of between 9:8 and 12:8, preferably in a molar ratio of 11:8, but especially in a molar ratio of 10:8.
  • meloxicam and the other excipient, particularly disodium EDTA may be present in a weight ratio of between 25:1 and 15:1, preferably between 24:1 and 16:1, preferably between 23:1 and 17:1, more preferably between 22:1 and 18:1, most preferably between 21:1 and 19:1, and in particular about 20:1.
  • the formulation according to the invention may have shelf-life after opening of 28 days or more.
  • the shelf-life of the solution in the sealed original packaging may be 1 month or more, in particular between 1 month and 24 months, but at least between 1 month and 18 months, preferably between 1 month and 12 months, more preferably between 1 month and 9 months, most preferably between 1 month and 6 months, particularly between 1 month and 3 months. Details of the stability tests by way of example can be found in Tables 1 and 2 which follow:
  • Packing material 50 mL colorless glass vials, glass type I, ethylenepropylenenorbornene terpolymer rubber stopper (Type: WI 640 grey), aluminium flanged cap.
  • Packaging material 50 mL colorless glass vials, glass type I, ethylenepropylenenorbornene terpolymer rubber stopper (Type: WI 640 grey), aluminium flanged cap.
  • the formulation according to the invention should have a pH of between 8 and 10, preferably between 8.5 and 9, more preferably a pH between 8.7 and 8.9, and particularly 8.8.
  • the formulation according to the invention is suitable for treating pain, inflammation, fever, acute mastitis, diarrhea, lameness, problems with the locomotor apparatus, and respiratory complaints in animals, preferably acute mastitis, diarrhea, lameness, problems with the locomotor apparatus and respiratory complaints, especially acute mastitis, diarrhea, lameness, problems with the locomotor apparatus and respiratory complaints, and most preferably respiratory complaints.
  • the treatment may be given in conjunction with antibiotic therapy.
  • the formulation according to the invention is suitable for treating animals, preferably farm animals, and more particularly large farm animals.
  • the formulation according to the invention is suitable for treating animals, preferably animals up to 500 kg, particularly large animals up to 750 kg.
  • the dosage of the formulation according to the invention should corresponding to 0.2 to 1.0 mg of active substance per kg of bodyweight, preferably 0.4 to 0.8 mg/kg of bodyweight, more preferably 0.5 to 0.7 mg/kg of bodyweight, and particularly preferably 0.6 mg/kg of bodyweight.
  • the formulation according to the invention may be prepared using the methods of preparing aqueous liquid formulations known from the literature.
  • the appropriate excipients may be added to a meloxicam salt solution.
  • aqueous liquid formulations which will allow sealing under inert gas and final sterilization by autoclaving in the finished container may be used as a packaging material for the formulation according to the invention.
  • Such materials include for example ampoules or glass vials, particularly glass vials, e.g., 50 mL or 100 mL glass vials of glass Type I (according to Pharm. Eur/USP) in conjunction with rubber stoppers made of ethylenepropylenenorbornene terpolymer (Type WI 640 grey) and aluminium caps.
  • Example 1 2% Meloxicam Solution Component Amount (g/L) Meloxicam 20.0 Meglumine 14.0 Macrogol 300 1 150.0 Poloxamer 188 2 50.0 Ethanol 150.0 Glycine 5.0 EDTA—Na 1.0 1M HCl q.s. ad pH 8.8 1M NaOH q.s. ad pH 8.8 Water for injections ad 1000 mL Legend: 1 obtainable from Brenntag, Plochingen, Germany; and 2 obtainable from C.H. Erbsloeh, Krefeld, Germany
  • meloxicam 20 g are dissolved in 500 mL of an aqueous meglumine solution (14 g/500 mL) at 90° C.
  • the other excipients are added one after another to the solution according to the recipe given above.
  • a pH of 8.8 is then achieved using 1M hydrochloric acid and 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 2 2% Meloxicam Solution Component Amount (g/L) Meloxicam 20.0 Meglumine 12.5 PEG 400 100.0 Poloxamer 50.0 Ethanol 150.0 Glycine 5.0 EDTA—Na 1.0 1M HCl q.s. ad pH 8.8 1M NaOH q.s. ad pH 8.8 Water for injections ad 1000 mL
  • meloxicam 20 g are dissolved in 500 mL of an aqueous meglumine solution (12.5 g/500 mL) at 90° C.
  • the other excipients are added one after another to the solution according to the recipe given above.
  • a pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 3 2.5% Meloxicam Solution Component Amount (g/L) Meloxicam 25.0 Meglumine 17.5 PEG 300 150.0 Poloxamer 50.0 Ethanol 150.0 Glycine 5.0 EDTA—Na 1.0 1M HCl q.s. ad pH 8.8 1M NaOH q.s. ad pH 8.8 Water for injections ad 1000 mL
  • meloxicam 25 g are dissolved in 500 mL of an aqueous meglumine solution (17.5 g/500 mL) at 90° C.
  • the other excipients are added one after another to the solution according to the recipe given above.
  • a pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 4 1.5% Meloxicam Solution Component Amount (g/L) Meloxicam 15.0 Meglumine 10.5 PEG 300 100.0 Poloxamer 50.0 Ethanol 150.0 Glycine 5.0 EDTA—Na 1.0 1M HCl q.s. ad pH 8.8 1M NaOH q.s. ad pH 8.8 Water for injections ad 1000 mL
  • meloxicam 15 g are dissolved in 500 mL of an aqueous meglumine solution (10.5 g/500 mL) at 90° C.
  • the other excipients are added one after another to the solution according to the recipe given above.
  • a pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 5 2% Meloxicam Solution Component Amount (g/L) Meloxicam 20.0 Meglumine 14.0 PEG 300 150.0 Poloxamer 50.0 p-Chloro-m-cresol 2.0 Glycine 5.0 EDTA—Na 1.0 1M HCl q.s. ad pH 8.8 1M NaOH q.s. ad pH 8.8 Water for injections ad 1000 mL
  • meloxicam 20 g are dissolved in 500 mL of an aqueous meglumine solution (14 g/500 mL) at 90° C.
  • the other excipients are added one after another to the solution according to the recipe given above.
  • a pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.

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Abstract

Aqueous cyclodextrin-free solution of meloxicam for administration by oral or parenteral route, containing a pharmacologically acceptable meloxicam salt of an organic or inorganic base and one or more suitable excipients, the content of dissolved meloxicam salt being more than 10 mg/mL. The formulation according to the invention has a shelf-life of up to 24 months or more.

Description

    CROSS REFERENCE TO RELATED APPLICATIONS
  • This application claims priority to pending U.S. Nonprovisional application Ser. No. 11/290,933, filed 30 Nov. 2005 and entitled “Highly Concentrated Stable Meloxicam Solutions,” which claims priority to abandoned U.S. Nonprovisional application Ser. No. 09/860,737, filed 18 May 2001 and entitled “Highly Concentrated Stable Meloxicam Solutions,” which claims priority to U.S. Provisional Application No. 60/216,004, filed 3 Jul. 2000 and entitled “Highly Concentrated Stable Meloxicam Solutions,” and which claims priority to German Application No. 100 30 345.5, filed 20 Jun. 2000. The disclosure of each aforementioned application is incorporated herein by reference in its entirety.
    • FIELD OF THE INVENTION
  • The present invention relates to highly concentrated stable meloxicam solutions for oral and parenteral administration, particularly for treating respiratory diseases in large farm animals.
    • BACKGROUND OF THE INVENTION
  • Meloxicam (4-hydroxy-2-methyl-N-(5-methyl-2-thiazolyl)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide) is an active substance which belongs to the group of NSAIDs (non-steroidal antiinflammatory drugs). Meloxicam and the sodium and meglumine (N-methyl-D-glucamine) salt thereof are described in EP-A-0 002 482. EP-A-0 002 482 shows, inter alia, the example of a 0.2% injectable solution of meloxicam consisting of the meglumine salt of the active substance, sodium chloride, and water.
  • EP-A-0 945 134 discloses the pH-dependent solubility characteristics of meloxicam and its salts, i.e., the sodium salt, the ammonium salt, and the meglumine salt, in aqueous solution. According to EP-A-0 945 134, meloxicam is an active substance which does not dissolve readily in water and the meloxicam salts, particularly the meglumine salt, exhibit improved solubility as the pH increases between 4 and 10, as shown in Table 1 of EP-0 945 134. However, until now it has only been possible to produce stable, clear, aqueous solutions with a low concentration of meloxicam. In addition to involving the in situ formation of a meloxicam salt, e.g., meglumine salt, and the addition of solubilizers, these prior art solutions were required to have a pH in the range of maximum possible solubility as well as being reasonably well-tolerated and contain a high proportion of organic solvent. Formulation tests with the same or a similar recipe led to cloudiness of the solution if the meloxicam concentrations were higher, e.g., 2%.
  • W09959634 A1 describes an eye drop solution containing 0.5% meloxicam but makes no reference to possible meloxicam concentrations over 1%. For example, a commercially available 0.5% meloxicam solution is used in small animals such as dogs, heifers, and calves to treat respiratory diseases.
  • Thus, it has not hitherto been possible to treat large farm animals with an injectable meloxicam solution as the low concentration of active substance in the injectable solution did not allow an acceptable, well-tolerated injection volume due to the great weight of the animals. Furthermore, parenteral administration requires that the solution be free from particles; if there are particles in a parenteral drug, there is a risk of vascular damage or embolism. Moreover, organic solvents, solubilizers, and water-soluble substances can only be used in certain concentrations to achieve acceptable drug tolerance. These problems are solved by the present invention which provides particle-free, highly concentrated meloxicam solutions which are stable over long periods and suitable for treating farm animals up to 750 kg in weight. The meloxicam solutions of the present invention should, therefore, be suitable for administration both orally or parenterally.
    • DETAILED DESCRIPTION OF THE INVENTION
  • Surprisingly, it has been found that highly concentrated meloxicam solutions which contain, in addition to a meloxicam salt and certain excipients, another excipient selected from among citric acid, lecithin, gluconic acid, tartaric acid, phosphoric acid, and EDTA or the salts thereof, may be produced so as to be particle-free and stable over long periods. The stability was achieved with an unexpectedly small amount of organic solubilizers. The formulation was found to be stable even when subjected to the process of final sterilization.
  • This results in the solution to the problem according to the invention, as a formulation of a meloxicam solution which contains, in addition to a meloxicam salt, small concentrations of solubilizer, a preservative, a buffer substance for achieving the optimum pH range, and another excipient.
  • The invention relates to aqueous cyclodextrin-free solutions of meloxicam for parenteral or oral administration which contain a pharmacologically acceptable meloxicam salt of an organic or inorganic base in a highly concentrated solution with 11-25 mg/mL of meloxicam together with suitable excipients.
  • The formulation according to the invention overcomes the problem arising from the prior art of providing an injectable solution of the active substance meloxicam which is also suitable for treating large farm animals, by permitting a high concentration of active substance in a particle free solution which is stable over the long term, having the composition described hereinafter.
  • The formulation according to the invention may contain, as the meloxicam salt, the meglumine, sodium, potassium, or ammonium salt, preferably the meloxicam meglumine salt.
  • The solubilizers used may be, for example, polyethyleneglycols, polyoxyethylene-polyoxypropylene copolymers (e.g., Poloxamer 188), glycofurol, arginine, lysine, castor oil, propyleneglycol, solketal, polysorbate, glycerol, sorbitol, mannitol, xylitol, polyvinylpyrrolidone, lecithin, cholesterol, 12-hydroxystearic acid-PEG660-ester, propyleneglycol monostearate, polyoxy-40-hydrogenated castor oil, polyoxyl-10-oleyl-ether, polyoxyl-20-cetostearylether, and polyoxyl-40-stearate or a mixture of sorbitol, mannitol and xylitol, preferably polyethyleneglycols, polyoxyethylene-polyoxypropylene copolymers, glycofurol, polyvinylpyrrolidone, lecithin, cholesterol, 12-hydroxystearic acid-PEG66O-esters, propyleneglycol monostearate, polyoxy-40-hydrogenated castor oil, polyoxyl-10-oleyl-ether, polyoxyl-20-cetostearylether, and polyoxyl-40-stearate. Particularly preferred are polyethyleneglycols, glycofurol, and polyoxyethylene-polyoxypropylene-copolymers, but especially polyethyleneglycols (e.g., Macrogol 300) and polyoxyethylene-polyoxypropylene copolymers (e.g., Poloxamer 188). The preservatives used may be, for example, ethanol, benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, chlorobutanol, benzyl alcohol, phenylethanol, the methyl, ethyl, propyl, or butyl p-hydroxybenzoates, phenol, m-cresol, p-chloro-m-cresol, or benzalkonium chloride. Particularly preferred are ethanol, benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, chlorobutanol, benzyl alcohol, phenylethanol, and the methyl, ethyl, propyl, or butyl p-hydroxybenzoates, but preferably ethanol, benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, but especially ethanol.
  • The buffer system used to achieve a pH of between 8 and 10 may be, for example, glycine, a mixture of glycine and HCl, a mixture of glycine and sodium hydroxide solution, and the sodium and potassium salts thereof, a mixture of potassium hydrogen phthalate and hydrochloric acid, a mixture of potassium hydrogen phthalate and sodium hydroxide solution, or a mixture of glutamic acid and glutamate. Glycine, a mixture of glycine and HCl, and a mixture of glycine/sodium hydroxide solution, especially glycine, are particularly preferred.
  • Other suitable excipients are citric acid, lecithin, gluconic acid, tartaric acid, phosphoric acid, and EDTA or the alkali metal salts thereof, preferably tartaric acid and EDTA or the alkali metal salts thereof, particularly disodium EDTA.
  • One embodiment of the invention contains, in addition to the meglumine or sodium salt of meloxicam, polyethyleneglycols, glycofurol and/or polyoxyethylene-polyoxypropylene copolymers, but particularly polyethyleneglycols (e.g., Macrogol 300) and/or polyoxyethylene-polyoxypropylene copolymers (e.g., Poloxamer 188) as solubilizer, ethanol, benzoic acid and the sodium or potassium salts thereof, or sorbic acid and the sodium or potassium salts thereof, but particularly ethanol, as preservative, and glycine, a mixture of glycine/HCl, or a mixture of glycine/sodium hydroxide solution, but preferably glycine, as buffer, and disodium EDTA as an additional excipient.
  • The formulation according to the invention may contain meloxicam in a concentration of 11-25 mg/mL, preferably 13-24 mg/mL, preferably 16-23 mg/mL, particularly preferably 18-22 mg/mL, and especially 20 mg/mL.
  • The meglumine concentration may be between 12.5 and 16.5 mg/mL, preferably 13-16 mg/mL, preferably 13.5-15.5 mg/mL, more preferably 14-15 mg/mL, and especially about 14 mg/mL. The possible sodium, potassium, and ammonium concentrations are calculated accordingly.
  • The concentration of the solubilizers may be in the range from 20-200 mg/mL, preferably 30-150 mg/mL, preferably 40-130 mg/mL, more preferably 50-120 mg/mL, and especially 70-100 mg/mL.
  • The concentration of the preservative ethanol may be in the range from 100-200 mg/mL, preferably 120-180 mg/mL, and more preferably about 150 mg/mL.
  • The concentration of the preservatives benzoic acid and the sodium or potassium salts thereof, sorbic acid and the sodium or potassium salts thereof, chlorobutanol, benzyl alcohol, phenylethanol, phenol, m-cresol, and p-chloro-m-cresol, may be in the range from 0.5-50 mg/mL, preferably 1-10 mg/mL, and more preferably 3-5 mg/mL.
  • The concentration of the preservatives benzalkonium chloride, phenylmercury nitrate, and methyl, ethyl, propyl, or butyl-p-hydroxybenzoates, may be in the range from 0.01-4 mg/mL, preferably 0.02-3 mg/mL, and more preferably 0.1-0.5 mg/mL.
  • The concentration of the buffer substances may be between 4 and 50 mg/mL, preferably between 5 and 20 mg/mL, and more preferably between 8 and 10 mg/mL.
  • The concentration of the other excipients mentioned above, e.g., EDTA, citric acid, lecithin, gluconic acid, tartaric acid, and phosphoric acid or the salts thereof, may be in the range from 0.2-3 mg/mL, preferably 0.3-2.5 mg/mL, preferably 0.5-2 mg/mL, most preferably 0.6-1.5 mg/mL, and in particular 0.7-1.0 mg/mL.
  • Meglumine and meloxicam may be used in a molar ratio of between 9:8 and 12:8, preferably in a molar ratio of 11:8, but especially in a molar ratio of 10:8.
  • In the formulation according to the invention, meloxicam and the other excipient, particularly disodium EDTA, may be present in a weight ratio of between 25:1 and 15:1, preferably between 24:1 and 16:1, preferably between 23:1 and 17:1, more preferably between 22:1 and 18:1, most preferably between 21:1 and 19:1, and in particular about 20:1.
  • The formulation according to the invention may have shelf-life after opening of 28 days or more.
  • The shelf-life of the solution in the sealed original packaging may be 1 month or more, in particular between 1 month and 24 months, but at least between 1 month and 18 months, preferably between 1 month and 12 months, more preferably between 1 month and 9 months, most preferably between 1 month and 6 months, particularly between 1 month and 3 months. Details of the stability tests by way of example can be found in Tables 1 and 2 which follow:
  • Test of Stability After Opening
  • Packing material: 50 mL colorless glass vials, glass type I, ethylenepropylenenorbornene terpolymer rubber stopper (Type: WI 640 grey), aluminium flanged cap.
  • Recipe: analogous to Example 1 of the description
  • 4 mL samples were taken from the storage samples three times a day for six days and on the seventh day 4 mL samples were taken four times. Storage was then continued until 28 days had elapsed and samples were taken again.
  • TABLE 1
    Storage conditions Storage Meloxicam
    [° C./% relative time content
    Test No. humidity] [Days] [mg/mL]
    1 25° C. 0 19.7
    25° C./60% 28 19.2
    2 25° C. 0 20
    25° C./60% 28 19.2
  • In both samples, in addition to the meloxicam content, the parameters investigated, namely appearance (clear yellow solution), pH (8.0-9.7), ethanol content (13.5-15.75), disodium EDTA content (85.0-110.0 mg/100 mL), sterility (according to Pharm. Eur. and USP), and the stability of the packaging material were found to be unchanged.
  • Long Term Stability Test in Sealed Original Packaging
  • Packaging material: 50 mL colorless glass vials, glass type I, ethylenepropylenenorbornene terpolymer rubber stopper (Type: WI 640 grey), aluminium flanged cap.
  • Recipe: Analogous to Example 1 of the description.
  • TABLE 2
    Storage conditions Storage Meloxicam
    [° C./% relative time content
    Test No. humidity] [Days] [mg/mL]
    1 25° C. 0 19.7
     4° C. 6 19.9
    40° C./75% 6 19.5
    25° C./60% 18 19.3
    30° C./70% 18 19.4
    2 25° C. 0 20.0
     4° C. 6 19.9
    40° C./75% 6 19.7
    25° C./60% 18 19.4
    30° C./70% 18 19.5
    25° C./60% 24 19.5
    30° C./70% 24 19.5
  • In both samples, in addition to the meloxicam content, the parameters investigated, namely appearance (clear yellow solution), pH (8.0-9.7), ethanol content (13.5-15.75), disodium EDTA content (85.0-110.0 mg/100 mL), sterility (according to Pharm. Eur. and USP), and the stability of the packaging material were found to be unchanged.
  • The formulation according to the invention should have a pH of between 8 and 10, preferably between 8.5 and 9, more preferably a pH between 8.7 and 8.9, and particularly 8.8.
  • The formulation according to the invention is suitable for treating pain, inflammation, fever, acute mastitis, diarrhea, lameness, problems with the locomotor apparatus, and respiratory complaints in animals, preferably acute mastitis, diarrhea, lameness, problems with the locomotor apparatus and respiratory complaints, especially acute mastitis, diarrhea, lameness, problems with the locomotor apparatus and respiratory complaints, and most preferably respiratory complaints. The treatment may be given in conjunction with antibiotic therapy.
  • The formulation according to the invention is suitable for treating animals, preferably farm animals, and more particularly large farm animals.
  • The formulation according to the invention is suitable for treating animals, preferably animals up to 500 kg, particularly large animals up to 750 kg.
  • The dosage of the formulation according to the invention should corresponding to 0.2 to 1.0 mg of active substance per kg of bodyweight, preferably 0.4 to 0.8 mg/kg of bodyweight, more preferably 0.5 to 0.7 mg/kg of bodyweight, and particularly preferably 0.6 mg/kg of bodyweight.
  • The formulation according to the invention may be prepared using the methods of preparing aqueous liquid formulations known from the literature. For example, the appropriate excipients may be added to a meloxicam salt solution.
  • Various commercial materials for aqueous liquid formulations which will allow sealing under inert gas and final sterilization by autoclaving in the finished container may be used as a packaging material for the formulation according to the invention. Such materials include for example ampoules or glass vials, particularly glass vials, e.g., 50 mL or 100 mL glass vials of glass Type I (according to Pharm. Eur/USP) in conjunction with rubber stoppers made of ethylenepropylenenorbornene terpolymer (Type WI 640 grey) and aluminium caps.
  • The meloxicam solutions according to the invention will now be illustrated by the Examples which follow. Anyone skilled in the art will be aware that the Examples serve only as an illustration and are not to be regarded as restrictive.
    • EXAMPLES
  • Example 1: 2% Meloxicam Solution
    Component Amount (g/L)
    Meloxicam 20.0
    Meglumine 14.0
    Macrogol 3001 150.0
    Poloxamer 1882 50.0
    Ethanol 150.0
    Glycine 5.0
    EDTA—Na 1.0
    1M HCl q.s. ad pH 8.8
    1M NaOH q.s. ad pH 8.8
    Water for injections ad 1000 mL
    Legend:
    1obtainable from Brenntag, Plochingen, Germany; and
    2obtainable from C.H. Erbsloeh, Krefeld, Germany
  • Method:
  • 20 g of meloxicam are dissolved in 500 mL of an aqueous meglumine solution (14 g/500 mL) at 90° C. The other excipients are added one after another to the solution according to the recipe given above. A pH of 8.8 is then achieved using 1M hydrochloric acid and 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 2: 2% Meloxicam Solution
    Component Amount (g/L)
    Meloxicam 20.0
    Meglumine 12.5
    PEG 400 100.0
    Poloxamer 50.0
    Ethanol 150.0
    Glycine 5.0
    EDTA—Na 1.0
    1M HCl q.s. ad pH 8.8
    1M NaOH q.s. ad pH 8.8
    Water for injections ad 1000 mL
  • Method:
  • 20 g of meloxicam are dissolved in 500 mL of an aqueous meglumine solution (12.5 g/500 mL) at 90° C. The other excipients are added one after another to the solution according to the recipe given above. A pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 3: 2.5% Meloxicam Solution
    Component Amount (g/L)
    Meloxicam 25.0
    Meglumine 17.5
    PEG 300 150.0
    Poloxamer 50.0
    Ethanol 150.0
    Glycine 5.0
    EDTA—Na 1.0
    1M HCl q.s. ad pH 8.8
    1M NaOH q.s. ad pH 8.8
    Water for injections ad 1000 mL
  • Method:
  • 25 g of meloxicam are dissolved in 500 mL of an aqueous meglumine solution (17.5 g/500 mL) at 90° C. The other excipients are added one after another to the solution according to the recipe given above. A pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 4: 1.5% Meloxicam Solution
    Component Amount (g/L)
    Meloxicam 15.0
    Meglumine 10.5
    PEG 300 100.0
    Poloxamer 50.0
    Ethanol 150.0
    Glycine 5.0
    EDTA—Na 1.0
    1M HCl q.s. ad pH 8.8
    1M NaOH q.s. ad pH 8.8
    Water for injections ad 1000 mL
  • Method:
  • 15 g of meloxicam are dissolved in 500 mL of an aqueous meglumine solution (10.5 g/500 mL) at 90° C. The other excipients are added one after another to the solution according to the recipe given above. A pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.
  • Example 5: 2% Meloxicam Solution
    Component Amount (g/L)
    Meloxicam 20.0
    Meglumine 14.0
    PEG 300 150.0
    Poloxamer 50.0
    p-Chloro-m-cresol 2.0
    Glycine 5.0
    EDTA—Na 1.0
    1M HCl q.s. ad pH 8.8
    1M NaOH q.s. ad pH 8.8
    Water for injections ad 1000 mL
  • Method:
  • 20 g of meloxicam are dissolved in 500 mL of an aqueous meglumine solution (14 g/500 mL) at 90° C. The other excipients are added one after another to the solution according to the recipe given above. A pH of 8.8 is then achieved using 1M hydrochloric acid or 1M sodium hydroxide solution. Water is added to the solution until a volume of 1 liter is obtained.

Claims (19)

We claim:
1. A treatment method for treating a mammal suffering from one or more of pain, inflammation, fever, acute mastitis, diarrhea, lameness, locomotor deficiency, or respiratory illness, the method comprising administering to the mammal an aqueous, cyclodextrin-free solution comprising a pharmacologically acceptable meloxicam salt of an organic or inorganic base and one or more suitable excipients, wherein the concentration of dissolved meloxicam salt is more than 10 mg/mL.
2. The method according to claim 1, wherein the method is used in conjunction with antibiotic therapy.
3. The method according to claim 1, wherein the solution is administered in a dosage range of from 0.2 to 1.0 mg of active substance/kg of bodyweight of the mammal.
4. The method according to claim 1, wherein the solution is administered in a dosage range of from 0.4 to 0.8 mg of active substance/kg of bodyweight of the mammal.
5. The method according to claim 1, wherein the solution is administered in a dosage range of from 0.5 to 0.7 mg of active substance/kg of bodyweight of the mammal.
6. A treatment method for treating an animal suffering from one or more of pain, inflammation, fever, acute mastitis, diarrhea, lameness, locomotor deficiency, or respiratory illness, the method comprising administering to the animal an aqueous, cyclodextrin-free solution comprising:
a pharmacologically acceptable meloxicam salt; and
an excipient selected from the group consisting of citric acid, lecithin, gluconic acid, tartaric acid, phosphoric acid, and EDTA, and alkali metal salts thereof,
wherein the meloxicam salt is present in the aqueous solution in a concentration of more than 10 mg/mL.
7. The treatment method according to claim 6, wherein the meloxicam salt is selected from the group consisting of meglumine salt, sodium salt, potassium salt, and ammonium salt.
8. The treatment method according to claim 7, wherein the aqueous composition further comprises a solubilizer, a preservative, and a buffer
9. The treatment method according to claim 8, wherein the solubilizer is selected from the group consisting of polyethyleneglycol, glycofurol, and polyoxyethylene-polyoxypropylene-copolymers.
10. The treatment method according to claim 8, wherein the preservative is selected from the group consisting of ethanol, benzoic acid and the sodium or potassium salts thereof, and sorbic acid and the sodium or potassium salts thereof.
11. The treatment method according to claim 8, wherein the buffer is effect to achieve a solution pH of between 8 and 10.
12. The treatment method according to claim 11, wherein the buffer is selected from the group consisting of glycine, a mixture of glycine and HCl, a mixture of glycine and sodium hydroxide solution, the sodium and potassium salts thereof, a mixture of potassium hydrogen phthalate and hydrochloric acid, a mixture of potassium hydrogen phthalate and sodium hydroxide solution, and a mixture of glutamic acid and glutamate.
13. The treatment method according to claim 6, wherein:
the meloxicam salt is selected from the group consisting of meglumine or sodium salt of meloxicam;
the excipient is disodium EDTA; and
the aqueous further comprises:
a solubilizer selected from the group consisting of polyethyleneglycols, glycofurol and polyoxyethylene-polyoxypropylene copolymers,
a preservative selected from the group consisting of ethanol, benzoic acid and the sodium or potassium salts thereof, and sorbic acid and the sodium or potassium salts thereof, and
a buffer selected from the group consisting of glycine, a mixture of glycine/HCl, and a mixture of glycine/sodium hydroxide solution, but preferably glycine.
14. The treatment method according to claim 13, wherein:
the meloxicam salt is present in a concentration of 11 mg/mL to 25 mg/mL;
the solubilizer is present in the range from 20 mg/mL to 200 mg/mL; and
the buffer is present in a concentration of from 4 mg/mL to 50 mg/mL.
15. The treatment method according to claim 6, wherein:
the meloxicam salt is meglumine; and
the aqueous further comprises:
a solubilizer selected from the group consisting of polyethyleneglycols and polyoxyethylene-polyoxypropylene copolymers,
a preservative comprising ethanol, and
a buffer comprising glycine.
16. The treatment method according to claim 15, wherein:
the meglumine is present in a concentration of from 12.5 mg/mL to 16.5 mg/mL;
the ethanol is present in a concentration of from 100-200 mg/mL
18. The treatment method according to claim 6, wherein:
the meloxicam salt is present in a molar ratio of between 9:8 and 12:8; and
the excipient is present in a weight ratio of between 25:1 and 15:1.
19. A kit comprising:
packaging material; and
an aqueous, cyclodextrin-free solution comprising a pharmacologically acceptable meloxicam salt of an organic or inorganic base and one or more suitable excipients, wherein the concentration of dissolved meloxicam salt is more than 10 mg/mL,
wherein the solution is contained in the packaging material, and wherein shelf-life of the solution in the packaging material is from one month to 24 months.
20. The kit according to claim 19, wherein the packaging material comprises a glass vial with a closure.
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