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
  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
  • A61K9/1605—Excipients; Inactive ingredients
  • A61K9/1617—Organic compounds, e.g. phospholipids, fats
• • 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
  • A61K47/12—Carboxylic acids; Salts or anhydrides thereof
• • 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
  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
  • A61K9/1605—Excipients; Inactive ingredients
  • A61K9/1629—Organic macromolecular compounds
  • A61K9/1652—Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin
• • 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
  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
  • A61K9/1682—Processes
• • 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
  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
  • A61K9/1682—Processes
  • A61K9/1694—Processes resulting in granules or microspheres of the matrix type containing more than 5% of excipient

Definitions

• the invention relates to a method for the production of carrier pellets for pharmaceutical active substances. Likewise, the invention relates to such carrier pellets and also to pharmaceutical formulations containing these.
• the carrier pellets according to the invention are used for transporting and releasing pharmaceutical active substances, in particular in the human body.
• compositions which can be applied in particular orally are intended to be formulated suitably for the respective application in order to effect release of the pharmaceutical active substances at the correct time and without disturbing side-effects.
• active substances which can be administered for example orally are intended to be released as far as possible such that an unpleasant, e.g. bitter, taste in the mouth is avoided since this can lead to reactions of repulsion in particular in children.
• the active substances must be released in the stomach or intestine as completely as possible and in a rapidly absorbable form if a systemic treatment is sought.
• the active substance In the case of oral administration of drugs, the active substance is released in the gastro-intestinal tract and a part of the active substance is absorbed. By controlling the release of the active substance, the degree of absorption and the effective duration can be influenced. Correspondingly, various proposals have been made for controlling release of the active substance by suitable galenic formulations of the active substance.
• One approach resides in providing administration forms with coatings, release of the active substance being able to be influenced as a function of the solubility or permeability of the coatings.
• Such coatings can be applied for example on tablets or capsules.
• a disadvantage exists however in that a faulty or damaged coating can lead to the fact that the release of the total active substance dose is not controlled in the desired manner.
• multiparticulate administration forms in which the total quantity of the active substance is apportioned to a larger number of smaller units, such as pellets. If the individual pellets are provided with coatings, then, in the case of a faulty coating in one pellet, only a correspondingly small proportion of the total active substance dose is not subjected to the desired release.
• a further advantage of such administration forms based on pellets resides in the fact that sufficiently small pellets pass into the intestine from the stomach relatively rapidly after ingestion.
• tablets, as long as they do not disintegrate, can also remain in the stomach for a fairly long time, the time in addition being very variable.
• a pH regulator which has a regulating effect in the physiological surroundings is used, such that the pH value is lowered or increased and hence the bioavailability of pharmaceutically effective components is made possible or increased.
• the pH regulator has a stabilising function, e.g. when using a buffer system as pH regulator.
• the pH regulator is an organic acid, this being selected particularly preferably from the group comprising C 1 -C 18 mono-, di- and tricarboxylic acids and also mixtures thereof.
• organic acid these being selected particularly preferably from the group comprising C 1 -C 18 mono-, di- and tricarboxylic acids and also mixtures thereof.
• Representatives of this group given by way of example, are citric acid, succinic acid, malic acid, fumaric acid, tartaric acid, sorbic acid, adipinic acid, salts and mixtures thereof. It is likewise possible that ascorbic acid or salts thereof are used as pH regulator.
• a further preferred embodiment provides that the at least one pH regulator is an acidic or basic salt.
• the pH regulator is a buffer system
• this preferably comprises an acidic or basic salt together with a corresponding caustic solution or acid.
• these are citric acid/citrate or tartaric acid/tartrate.
• the pH regulator is an organic base, e.g. a purine base or a pyrimidine base, or a mixture of these bases.
• the purine base is preferably selected from the group comprising adenine, guanine, hypoxanthine, xanthine and mixtures hereof.
• the pyrimidine base is preferably selected from the group comprising cytosine, uracil, thymine and mixtures hereof.
• the pH regulator is a basic inorganic salt
• this is preferably selected from the group comprising NaHCO 3 , K 2 CO 3 , Na 2 CO 3 , KHCO 3 , Ca(OH) 2 , CaO, phosphates and mixtures hereof.
• the formulation contains in addition at least one physiologically well-tolerated binder.
• This binder is thereby preferably selected from the group comprising methyl celluloses, hydroxymethyl celluloses, hydroxypropylmethyl celluloses, alginates, pectins, polyvinylpyrrolidones, xanthanes and also other hydrocolloids and mixtures hereof.
• organic solvents are used as solvents or emulsifiers.
• organic solvents particularly preferred are ethyl alcohol, isopropanol, n-propanol or mixtures thereof.
• the quantity ratio of pH regulator to binder in the liquid formulation is preferably in the range of 50:50 to 99:1.
• a preferred liquid formulation has 30 to 80% by weight of the at least one pH regulator, 0.5 to 5% by weight of the at least one binder and 15 to 69.5% by weight of the at least one solvent.
• the spray granulation can be effected both in a fluidised bed unit and in a spouted bed unit.
• the temperature in these units is thereby preferably in the range of 5 to 100° C.
• the drying gas flow entering the coating unit has, at the entrance into the unit, preferably a temperature in the range of 5 to 120°.
• drying gas in particular conditioned air, nitrogen or inert gases, e.g. noble gases.
• the drying gas is supplied via a sieve plate.
• the liquid formulation is introduced into the unit by nozzles disposed above the sieve plate.
• the drying gas is supplied through longitudinal gaps situated on the bottom.
• the liquid formulation is introduced via at least one nozzle disposed between the longitudinal gaps.
• introduction of the liquid formulation is effected through the nozzle from below to above.
• carrier pellets which contain at least one physiologically well-tolerated pH regulator are provided. These carrier pellets are produced according to the above-described method.
• the carrier pellets preferably have a diameter in the range of 50 ⁇ m to 1.5 mm, in particular of 90 ⁇ m to 1.2 mm.
• the carrier pellets are thereby preferably essentially spherical.
• the carrier pellets preferably have a sphericity of 0.8 to 1.0, in particular of 0.9 to 1.0.
• the sphericity is thereby calculated according to the following formula:
• the sphericity can be implemented with devices for particle size- and particle shape analysis with dynamic image analysis.
• a device suitable for this purpose is for example the CAMSIZER by Retsch Technology.
• the ratio of width to length of the carrier pellets is in the range of 0.8 to 1.0, in particular of 0.9 to 1.0.
• the ratio of width to length is thereby calculated according to the following formula:
• width-length ratio can be determined for example with the mentioned CAMSIZER.
• the carrier pellets according to the invention concern dense carrier pellets, which implies a weight reduction relative to extrusion pellets.
• the carrier pellets have essentially the same particle size, i.e. a narrow scatter range with respect to the particle size is present.
• the carrier pellets preferably contain at least one physiologically well-tolerated binder.
• This binder is thereby preferably selected from the group comprising methyl celluloses, hydroxymethyl celluloses, hydroxypropylmethyl celluloses, alginates, pectins, polyvinylpyrrolidones, xanthanes and also other hydrocolloids and also mixtures hereof.
• a pharmaceutical formulation containing the above-described carrier pellets and at least one active substance.
• the carrier pellets according to the invention are used as carrier structure for pharmaceutically effective components.
• the spray solution comprises purified water, methyl cellulose and malic acid.
• a 4% binder solution is produced from the purified water and methyl cellulose. This is temperature-controlled at 70° C. Thereafter, the addition of malic acid is effected with constant agitation until a complete solution is present (proportion of purified water corresponds to proportion of malic acid).
• the temperature-controlled spray solution is sprayed into the spouted bed apparatus (ProCell) in the bottom spray method.
• a constant particle formation is effected by atomising the solids solution in the main airflow.
• the latter comprises two partial flows which are produced through gap openings, leading along through the process chamber.
• the particle construction takes place by evaporation of the solvent water, malic acid and methyl cellulose remain in the airflow dried as particles.
• the particles in the upper process chamber separate from the central airflow and flow laterally, caused by gravity and the suction effect of the main airflow, back towards the process gas inlet. There, they are entrained again with the main airflow and coated continuously with solids from the spray solution.
• the process air is conditioned.
• the removal of acidic pellets is effected at the same time.
• the malic acid pellets are fractionated for the desired particle size.
• the end product is a homogeneous virtually spherical malic acid pellet with a uniform surface structure.

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• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Pharmacology & Pharmacy (AREA)
• Epidemiology (AREA)
• Medicinal Chemistry (AREA)
• Veterinary Medicine (AREA)
• General Health & Medical Sciences (AREA)
• Biophysics (AREA)
• Molecular Biology (AREA)
• General Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Medicinal Preparation (AREA)
• Glanulating (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)

Applications Claiming Priority (3)

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Citations (14)

Family Cites Families (13)

• 2008
  • 2008-01-17 DE DE102008004893A patent/DE102008004893A1/de not_active Ceased
• 2009
  • 2009-01-12 EP EP15172814.4A patent/EP2949320A1/de not_active Ceased
  • 2009-01-12 US US12/863,336 patent/US20110097411A1/en not_active Abandoned
  • 2009-01-12 EP EP09702374.1A patent/EP2244696B1/de active Active
  • 2009-01-12 PT PT97023741T patent/PT2244696E/pt unknown
  • 2009-01-12 DK DK09702374.1T patent/DK2244696T3/en active
  • 2009-01-12 ES ES09702374.1T patent/ES2552172T3/es active Active
  • 2009-01-12 HU HUE09702374A patent/HUE026364T2/en unknown
  • 2009-01-12 WO PCT/EP2009/000124 patent/WO2009090027A2/de active Application Filing
  • 2009-01-12 SI SI200931304T patent/SI2244696T1/sl unknown
  • 2009-01-12 PL PL09702374T patent/PL2244696T3/pl unknown
• 2014
  • 2014-03-13 US US14/209,056 patent/US11191726B2/en active Active
• 2015
  • 2015-04-07 US US14/680,281 patent/US20150209286A1/en not_active Abandoned
  • 2015-10-26 HR HRP20151132TT patent/HRP20151132T1/hr unknown
  • 2015-11-03 CY CY20151100979T patent/CY1117126T1/el unknown

Patent Citations (14)

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