WO2012060431A1 - 貼付剤 - Google Patents
貼付剤 Download PDFInfo
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- WO2012060431A1 WO2012060431A1 PCT/JP2011/075354 JP2011075354W WO2012060431A1 WO 2012060431 A1 WO2012060431 A1 WO 2012060431A1 JP 2011075354 W JP2011075354 W JP 2011075354W WO 2012060431 A1 WO2012060431 A1 WO 2012060431A1
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- clonidine
- weight
- polymer base
- layer
- molecular weight
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- 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
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
-
- 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
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
- A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
- A61K9/703—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
- A61K9/7038—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer
- A61K9/7046—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds
- A61K9/7053—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds, e.g. polyvinyl, polyisobutylene, polystyrene
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- 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
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/4164—1,3-Diazoles
- A61K31/4168—1,3-Diazoles having a nitrogen attached in position 2, e.g. clonidine
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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
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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
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/32—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers, poly(meth)acrylates, or polyvinyl pyrrolidone
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- 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
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
- A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
-
- 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
- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
- A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
- A61K9/703—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
- A61K9/7038—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer
- A61K9/7046—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/12—Antihypertensives
Definitions
- the present invention relates to a crystallized preparation of clonidine, which relates to a patch having stable transdermal absorbability despite a temperature change during storage.
- Clonidine is an ⁇ 2 receptor-stimulating central antihypertensive drug.
- a patch comprising clonidine is commercially available in the form of a crystal precipitation formulation. Such a clonidine patch can maintain its efficacy over a long period of one week after it is applied to the skin.
- a problem with clonidine patches is that transdermal absorbability changes due to temperature changes during storage. There is currently no effective countermeasure for this problem. Therefore, for example, medical sites are required to store clonidine patches under strict temperature control so as not to exceed 30 ° C. Therefore, the preservation of the clonidine patch places a heavy burden on the medical site.
- Patent Document 1 includes polyisobutylene (PIB), mineral oil (MO: liquid paraffin), colloidal silica, and clonidine, has an MO / PIB ratio of 1.0 or more, and a viscosity of 1.5 ⁇ 10 7 poise.
- PIB polyisobutylene
- MO mineral oil
- clonidine has an MO / PIB ratio of 1.0 or more, and a viscosity of 1.5 ⁇ 10 7 poise.
- a clonidine patch in which desired skin permeability (percutaneous absorbability) and viscosity (cohesive force) are ensured by using the plaster layer as described above is disclosed.
- the transdermal absorbability of the clonidine patch changes due to temperature changes during storage.
- Patent Document 2 discloses a co-polymer which is formed on a support and contains (meth) acrylic acid alkyl ester having an alkyl group having an average carbon number of 4 or more and vinyl ester having a polar parameter of 0 or less as essential components.
- a clonidine patch that uses a pressure-sensitive adhesive layer containing coalesced, dissolved clonidine, and dispersed clonidine organic acid salt to prevent reaction between clonidine and the pressure-sensitive adhesive, and to prevent clonidine crystals from precipitating. ing.
- the technique disclosed in Patent Document 2 cannot be used for a clonidine patch that prescribes only free base clonidine.
- An object of the present invention is to provide a crystallized preparation of clonidine, which has a stable transdermal absorbability despite temperature changes during storage.
- One possible reason for the change in transdermal absorbability of the clonidine crystallized drug product due to changes in temperature during storage may be due to changes in the crystalline state of clonidine due to temperature changes.
- the base of the clonidine patch stably retains clonidine, and when the patch is applied to the skin, the clonidine that is present in the crystalline state dissolves continuously into the plaster layer at a desired rate, and the skin surface It is necessary to have a function of diffusing into
- it is also necessary that the temperature dependence of the dissolution and diffusion behavior of clonidine is small.
- a certain amount of a polymer base having a viscosity average molecular weight of 800,000 or more and a liquid additive capable of dissolving clonidine are contained.
- the present inventors have found that it is effective to make the weight ratio of the liquid additive to the polymer base having a molecular weight of 800,000 or more within a certain range.
- the patch of the present invention is a support and a plaster layer laminated and integrated on one surface of the support, and includes 5 to 30% by weight of clonidine containing clonidine in a crystalline state, and a viscosity average molecular weight of 800,000 or more. 25 to 90% by weight of the polymer base (A) and 5 to 60% by weight of a liquid additive capable of dissolving the clonidine, and the liquid addition to the polymer base (A)
- the paste layer is characterized in that the weight ratio of the agent [liquid additive / polymer base (A)] is 0.1 to 2.0.
- the plaster layer of the patch contains free base clonidine (2,6-dichloro-N-2-imidazolidinylidenebenzeneamine) as an active ingredient (main drug).
- Free base type clonidine does not contain salts of clonidine such as clonidine hydrochloride and clonidine fumarate with inorganic acids or organic acids.
- the content of clonidine in the plaster layer is limited to 5 to 30% by weight, preferably 5 to 25% by weight, more preferably 8 to 20% by weight, and more preferably 10 to 15% by weight.
- the percutaneous absorption rate of clonidine will not last until the desired time, or the percutaneous absorption amount of clonidine will be insufficient, resulting in a large patch application area on the skin. Otherwise, the blood concentration of clonidine may not be raised to the desired range.
- the content of clonidine in the plaster layer is large, clonidine crystals will precipitate excessively in the plaster layer, resulting in insufficient cohesive strength and adhesive strength of the plaster layer. There is a possibility that the plaster layer protrudes from the side of the patch or easily peels off from the support or the skin. Moreover, when the content of clonidine in the plaster layer is excessive, clonidine is wasted and it is uneconomical.
- clonidine is contained in the mixture of the polymer base and the liquid additive in excess of the upper limit of the amount of clonidine that is soluble at room temperature. A part thereof is precipitated in a crystalline state, and the remaining part is dissolved in the polymer base and the liquid additive.
- the clonidine in the dissolved state first diffuses and is absorbed into the skin, and the clonidine in the crystalline state gradually increases with the decrease in the clonidine in the dissolved state. Dissolves in base and liquid additives.
- a paste layer forming solution described later In order to form a paste layer in which a part of clonidine is present in a crystalline state as described above, when a paste layer forming solution described later is manufactured, a polymer base and a liquid additive A paste layer forming solution containing clonidine exceeding the upper limit of the amount of clonidine that can be dissolved in the mixture at room temperature is prepared, and this paste layer forming solution is applied onto a suitable substrate such as a support or release paper. A method of working and drying is used. By such a method, it is possible to form a paste layer in which a part of clonidine is precipitated in a crystalline state.
- clonidine in a crystalline state is present in the paste layer in the following manner.
- the observation sample is observed with a polarizing microscope at a magnification of 100 times and photographed.
- the presence or absence of clonidine in the crystalline state can be determined by observing the obtained photograph.
- crystals having a crystal diameter of 1 ⁇ m or more are observed in the plaster layer, it is determined that clonidine in a crystalline state exists.
- the crystal diameter means the diameter of a perfect circle that is the smallest diameter that can surround the crystal on the photograph.
- Polymer base As the polymer base contained in the plaster layer of the patch of the present invention, a polymer base (A) having a viscosity average molecular weight of 800,000 or more is used. It has been confirmed by the present inventors that when the polymer base (A) having a viscosity average molecular weight of 800,000 or more is contained in the plaster layer at a certain ratio or more, the storage stability of clonidine is increased. Although the detailed mechanism by which such an effect is obtained is not clear, the crystalline state of clonidine contained in the paste layer can be stabilized. It is presumed as one of the mechanisms that clonidine existing in a crystalline state in the layer can be highly reduced from dissolving or precipitating.
- the content of the polymer base (A) in the plaster layer is limited to 25 to 90% by weight, preferably 25 to 85% by weight, more preferably 25 to 50% by weight, and particularly preferably 25 to 45% by weight. .
- the content of the polymer base (A) in the plaster layer is small, the cohesiveness of the plaster layer is lowered, and thus the paste layer protrudes during storage and the adhesive paste remains in the paste layer when applied. Not only is it likely to occur, but the above-described clonidine in the crystalline state is likely to be dissolved and precipitated, and accordingly, percutaneous absorbability is likely to change.
- the content of the polymer base (A) in the plaster layer is large, the adhesive strength of the plaster layer is reduced or the diffusion rate of the drug or additive is slowed to obtain the desired blood clonidine concentration. There is a risk that it may become impossible.
- the viscosity average molecular weight of the polymer base (A) is limited to 800,000 or more, but is preferably 900,000 to 4,000,000, more preferably 1,000,000 to 3,000,000, and particularly preferably 1,000,000 to 1,500,000.
- the crystal state of clonidine in the plaster layer can be stabilized by using the polymer base (A) having a viscosity average molecular weight of 800,000 or more.
- the plaster layer preferably further includes a polymer base (B) having a viscosity average molecular weight of 10,000 or more and less than 800,000 in addition to the polymer base (A) having a viscosity average molecular weight of 800,000 or more. .
- a polymer base (B) having a viscosity average molecular weight of 10,000 or more and less than 800,000 in addition to the polymer base (A) having a viscosity average molecular weight of 800,000 or more.
- the content of the polymer base (B) in the plaster layer is preferably 1 to 69% by weight, more preferably 1 to 20% by weight, and particularly preferably 1 to 15% by weight.
- the viscosity average molecular weight of the polymer base (B) is limited to 10,000 or more and less than 800,000, but is preferably 10,000 to 400,000, more preferably 20,000 to 100,000, and preferably 20,000 to 50,000. Particularly preferred. If the viscosity average molecular weight of the polymer base (B) is too small, the adhesive force of the plaster layer is insufficient, so that adhesive residue is likely to occur when the patch is peeled off. Moreover, when the viscosity average molecular weight of the polymer base (B) is too large, the plaster layer is hardened and easily peeled off, and the percutaneous absorbability of clonidine may be insufficient.
- the viscosity average molecular weights of the polymer bases (A) and (B) are measured by, for example, obtaining the intrinsic viscosity [ ⁇ ] of the polymer diluted solution with a capillary viscometer, and using Staudinger's viscosity formula or the like. It can be performed by the method of calculating.
- the polymer bases (A) and (B) are preferably pressure-sensitive adhesives such as rubber-based adhesives, acrylic-based adhesives, and silicone-based adhesives, but polymer groups that do not have pressure-sensitive adhesive properties. Agents can also be used.
- a pressure-sensitive adhesive is preferably used because it has little change in reactivity and physical properties accompanying temperature change.
- Examples of the rubber-based pressure-sensitive adhesive include polyisobutylene, polybutadiene, styrene-isoprene-styrene block copolymer, styrene-isoprene-butadiene-styrene block copolymer, and natural rubber.
- a commercially available product can be used as the rubber-based adhesive that can be used in the present invention.
- Examples of commercially available rubber-based pressure-sensitive adhesives having a viscosity average molecular weight of 800,000 or more include, for example, the trade name “Vistanex MML-80” (viscosity average molecular weight 990,000, manufactured by Exxon Chemical), and the trade name “Opanol B100” ( Viscosity average molecular weight 1,100,000, manufactured by BASF), trade name “Opanol B120” (viscosity average molecular weight 1,500,000, manufactured by BASF), and trade name “Vistanex MML-140” (viscosity average molecular weight 2) , 100,000, manufactured by Exxon Chemical Co., Ltd.).
- Rubber-based pressure-sensitive adhesives having a viscosity average molecular weight of 10,000 or more and less than 800,000 are trade names “Opanol B10SFN” (viscosity average molecular weight 36,000, manufactured by BASF), and trade names “Hi-Mall 6H”. (Viscosity average molecular weight: 60,000, manufactured by Nippon Petrochemical Co., Ltd.).
- Preferred examples of the acrylic pressure-sensitive adhesive include a copolymer containing 60% by weight or more of an alkyl (meth) acrylate component having an alkyl group having 1 to 20 carbon atoms.
- an alkyl (meth) acrylate having 1 to 20 carbon atoms in the alkyl group is not particularly limited, and examples thereof include methyl acrylate, methyl methacrylate, hexyl acrylate, hexyl methacrylate, octyl acrylate, octyl methacrylate, 2- Examples include ethylhexyl acrylate, 2-ethylhexyl methacrylate decyl acrylate, decyl methacrylate, dodecyl acrylate, dodecyl methacrylate, tridecyl acrylate, tridecyl methacrylate, octadecyl acrylate, octadecyl methacrylate, and the
- the copolymer may contain other monomer components other than alkyl (meth) acrylate having an alkyl group having 1 to 20 carbon atoms.
- Other monomers include, for example, polyfunctional monomers having two or more polymerizable functional groups in one molecule such as divinylbenzene, methylenebisacryloside, ethylene glycol dimethacrylate, and ethylene glycol diacrylate. Examples include acrylic acid, methacrylic acid, vinyl pyrrolidone, vinyl acetate, and (meth) acrylic acid hydroxyalkyl ester.
- (meth) acrylic acid means acrylic acid or methacrylic acid.
- a (meth) acrylic acid alkyl ester copolymer having no polar functional group is preferable from the viewpoint of adhesive properties and clonidine solubility, and an alkyl methacrylate component in which the alkyl group has 6 to 20 carbon atoms.
- an alkyl methacrylate component in which the alkyl group has 6 to 20 carbon atoms is particularly preferable.
- the polar functional group include a hydroxyl group, an amino group, and a carboxyl group.
- preferred examples of commercially available acrylic adhesives include DURO-TAK (registered trademark) 87-4098.
- polymer bases that can be used include polyvinyl alkyl ethers, polyvinyl acetate, partially saponified products of polyvinyl acetate, and vinyl-based polymer materials such as polyvinyl alcohol and polyvinyl pyrrolidone.
- these polymer materials are effective in controlling the sticking property, the solubility of clonidine is relatively high. Therefore, if the content of the polymer material is too high, the clonidine in the crystalline state cannot be retained. Therefore, when the polymer material is blended in the plaster layer, the content of the polymer material in the plaster is preferably 1 to 20% by weight, and more preferably 1 to 10% by weight.
- the polymer base (A) is a base that exhibits the effects of the present invention, is excellent in drug stability, and has little skin irritation.
- (Meth) acrylic acid alkyl ester copolymer having no carbon atom is preferable, and polyisobutylene is more preferable.
- the polymer base (B) is a base that exhibits the effects of the present invention sufficiently, has excellent drug stability, and has little skin irritation.
- a (meth) acrylic acid alkyl ester copolymer having no functional group is preferred, and polyisobutylene is more preferred.
- the plaster layer contains a liquid additive capable of dissolving clonidine in a predetermined amount or more, and further added to the polymer base (A) having a viscosity average molecular weight of 800,000 or more in the plaster layer. It has been found that by setting the weight ratio of the preparation within a certain range, the percutaneous absorption rate of clonidine can be maintained constant, and further, the storage stability and adhesiveness of the plaster layer can be improved.
- part of the clonidine contained in the plaster layer is precipitated in a crystalline state, and the remaining part is dissolved in the polymer base and the liquid additive.
- the clonidine in the dissolved state is first diffused and absorbed in the skin, and the clonidine in the crystalline state is gradually dissolved in the plaster layer.
- the dissolution rate and diffusion rate of clonidine are affected by the ratio of the polymer base (A) to the liquid additive. The higher the ratio of the liquid additive to the polymer base (A), the higher the dissolution rate and diffusion rate of clonidine, and the transdermal absorbability is improved.
- the higher the ratio of the liquid additive the greater the change in clonidine solubility due to temperature changes during storage, and the clonidine dissolved at high temperatures moves to the surface of the plaster layer and the interface with the support and precipitates at low temperatures. Due to the phenomenon, the transdermal absorbability of clonidine may decrease during storage, or may increase on the contrary. Such a change in the properties of clonidine tends to be noticeable when the content of clonidine in the plaster layer is 5% by weight or more.
- the weight ratio of the liquid additive to the polymer base (A) in the plaster layer [liquid additive / polymer base (A)] is limited to the range of 0.1 to 2.0, 0.5 to 1.9 is preferable, and 0.7 to 1.7 is more preferable. If the weight ratio [liquid additive / polymer base (A)] is less than 0.1, the transdermal absorbability of clonidine may be insufficient. On the other hand, when the weight ratio [liquid additive / polymer base (A)] exceeds 2.0, the cohesive force of the plaster layer is insufficient, and the percutaneous absorbability of clonidine may be easily changed. There is.
- the content of the liquid additive in the plaster layer is limited to 5 to 60% by weight, preferably 10 to 50% by weight, and more preferably 25 to 50% by weight. If the content of the liquid additive is less than 5% by weight, the percutaneous absorbability and sustainability of clonidine may be insufficient. If the content of the liquid additive exceeds 60%, the cohesive force of the plaster layer is insufficient, and the plaster layer easily protrudes during storage or pasting. In addition, when the content of the liquid additive exceeds 60%, the change in the solubility of clonidine due to temperature change occurs remarkably, and the crystal state of clonidine tends to change during storage. Characteristics such as stickiness may change.
- a liquid additive capable of dissolving clonidine is used for the plaster layer.
- a liquid additive capable of dissolving 0.001 to 30 parts by weight of clonidine with respect to 100 parts by weight of the liquid additive at 25 ° C. is preferable.
- Liquid additives that can dissolve clonidine include hydrocarbons such as liquid paraffin and squalane, isopropyl myristate, isopropyl palmitate, glyceryl monolaurate, diethyl sebacate, medium chain fatty acid triglycerides and other monovalent or polyvalent fatty acids.
- the plaster layer may contain additives such as a filler, a stabilizer, and an adhesive strength modifier in the plaster layer as long as the performance is not lost.
- the filler can be added to adjust the sticking property of the plaster layer and the drug release property.
- examples of such fillers include calcium carbonate, titanium oxide, lactose, crystalline cellulose, silicic anhydride, bentonite, and talc. Of these, anhydrous silicic acid is preferred, and light anhydrous silicic acid is more preferred, since the stability of clonidine and the adhesiveness of the plaster layer can be ensured.
- the content of the filler in the paste layer is preferably 1 to 20% by weight, and more preferably 2 to 10% by weight.
- Stabilizers are added for the purpose of suppressing drug degradation in the plaster layer, changes in physical properties of the polymer base, and color changes.
- stabilizers include antioxidants such as butylhydroxytoluene, sorbic acid and tocopherol acetate, cyclodextrins, ethylenediaminetetraacetic acid and the like.
- the content of the stabilizer in the plaster layer may be 0.05 to 10% by weight.
- the thickness of the plaster layer is appropriately set within a range in which the amount of clonidine capable of maintaining absorbability can be secured and good adhesiveness can be realized, but is preferably 20 to 200 ⁇ m, more preferably 30 to 120 ⁇ m. If the thickness of the plaster layer is less than 20 ⁇ m, not only a sufficient amount of clonidine cannot be retained, but also sufficient adhesiveness may not be exhibited when it is applied to the skin. On the other hand, if the thickness of the plaster layer exceeds 200 ⁇ m, it will not only contain clonidine more than necessary, but it will be wasted, and the plaster layer will tend to protrude from the side during storage, and the patch from the packaging bag during use May be difficult to remove.
- the plaster layer is laminated and integrated on one surface of the support. Only one plaster layer may be laminated and integrated on one surface of the support, or two or more plaster layers may be laminated and integrated.
- the support As a patch in which two layers of plaster layers are laminated and integrated on one surface of the support, the support, a first plaster layer laminated and integrated on one surface of the support, and the first plaster A patch containing a second plaster layer laminated and integrated on one surface of the body layer is exemplified.
- the speed and amount of clonidine transferred from the paste layer to the skin can be easily controlled within a desired range.
- the first plaster layer is prepared by dissolving 10 to 30% by weight of clonidine containing clonidine in a crystalline state, 25 to 50% by weight of the polymer base (A) having a viscosity average molecular weight of 800,000 or more, and the clonidine. And 30 to 55% by weight of a liquid additive, and the weight ratio of the liquid additive to the polymer base (A) [liquid additive / polymer base (A)] is 0. It is preferably 5 to 2.0.
- the second plaster layer comprises 5% by weight or more and less than 10% by weight of clonidine containing clonidine in a crystalline state, 25-50% by weight of the polymer base (A) having a viscosity average molecular weight of 800,000 or more, 30 to 55% by weight of a liquid additive capable of dissolving clonidine, and the weight ratio of the liquid additive to the polymer base (A) [liquid additive / polymer base (A)] Is preferably 0.5 to 2.0.
- the first plaster layer and the second plaster layer may each contain other additives such as a filler, a stabilizer, and an adhesive strength modifier.
- additives such as a filler, a stabilizer, and an adhesive strength modifier.
- polymer base (A), polymer base (B), liquid additive, and other additives used for the first plaster layer and the second plaster layer As described above.
- an adhesive layer having a smaller content (% by weight) of clonidine than the plaster layer is laminated and integrated on one surface of the plaster layer.
- the adhesive layer is usually laminated and integrated on the side of the plaster layer facing the skin.
- the composition of the adhesive layer is not particularly limited as long as it does not interfere with the transdermal absorbability from the plaster layer and achieves the purpose of enhancing the sticking property as a preparation.
- it can be set as the composition which contains the same component as the plaster layer and the clonidine concentration is lowered to a more preferable range for stickability.
- the adhesive layer preferably contains clonidine, a polymer base (A) having a viscosity average molecular weight of 800,000 or more, and a liquid additive capable of dissolving clonidine. It is more preferable that the polymer base (B) having an average molecular weight of 10,000 or more and less than 800,000 is further contained.
- the polymer base (A), the liquid additive and the polymer base (B) used for the adhesive layer those similar to the above-mentioned plaster layer can be used.
- the content of clonidine in the adhesive layer is preferably 0.5 to 3% by weight, more preferably 0.7 to 2% by weight. If the content of clonidine in the adhesive layer is low, the percutaneous absorption rate of clonidine will not last until the desired time, or the percutaneous absorption amount of clonidine will be insufficient, so the area of the patch applied to the skin must be increased. There is a possibility that the blood concentration of clonidine cannot be increased to a desired range. Moreover, when there is much content of the clonidine in an adhesion layer, there exists a possibility that the adhesive force of an adhesion layer may fall.
- the content of the polymer base (A) in the adhesive layer is preferably 25 to 90% by weight, more preferably 25 to 60% by weight, and particularly preferably 25 to 45% by weight.
- the content of the polymer base (A) in the adhesive layer is small, the cohesiveness of the adhesive layer is lowered, so that the adhesive layer sticks out during storage and the adhesive layer remains during sticking.
- the content of the polymer base (A) in the adhesive layer is large, the adhesive strength of the adhesive layer may be reduced, or the diffusion rate of the drug or additive may be slowed to obtain a desired clonidine blood concentration. There is a risk of being unable to do so.
- the content of the polymer base (B) in the adhesive layer is preferably 1 to 25% by weight, more preferably 1 to 20% by weight, 1 to 15% by weight is particularly preferred.
- the content of the polymer base (B) in an adhesion layer there exists a possibility that the adhesive force of an adhesion layer may fall.
- the content of the polymer base (B) in the adhesive layer is large, the cohesiveness of the adhesive layer is lowered, so that the adhesive layer protrudes during storage and the adhesive layer remains in the adhesive layer during pasting. Become.
- the content of the liquid additive in the adhesive layer is preferably 5 to 60% by weight, more preferably 10 to 50% by weight, and particularly preferably 30 to 50% by weight.
- the content of the liquid additive in the adhesive layer is large, the cohesiveness of the adhesive layer is lowered, so that the adhesive layer protrudes during storage and the adhesive layer remains easily during sticking.
- the weight ratio of the liquid additive to the polymer base (A) in the adhesive layer is preferably 0.1 to 2.0, and preferably 0.5 to 1.9. More preferred is 0.7 to 1.7. If the weight ratio [liquid additive / polymer base (A)] in the adhesive layer is less than 0.1, the percutaneous absorbability and sustainability of clonidine may be insufficient. In addition, when the weight ratio [liquid additive / polymer base (A)] in the adhesive layer exceeds 2.0, the cohesiveness of the adhesive layer decreases, so that the adhesive layer protrudes during storage and is applied. The adhesive residue of the adhesive layer is likely to occur.
- the thickness of the adhesive layer is preferably 20 to 200 ⁇ m, more preferably 25 to 200 ⁇ m. There exists a possibility that the adhesive force of an adhesion layer may become inadequate that the thickness of an adhesion layer is less than 20 micrometers. Moreover, when the thickness of the adhesive layer exceeds 200 ⁇ m, the adhesive layer easily protrudes from the side surface of the patch during storage.
- the adhesive layer may contain other additives such as a filler, a stabilizer, and an adhesive strength modifier.
- a filler such as a filler, a stabilizer, and an adhesive strength modifier.
- an adhesion layer the thing similar to a paste layer can be used.
- Control layer When the patch of the present invention includes the first paste layer and the second paste layer described above, it is preferable to provide a control layer between the first paste layer and the second paste layer. .
- the first plaster layer, the control layer, and the second plaster layer are used by being laminated and integrated on one surface of the support in this order. By providing the control layer in this way, it is possible to further increase the persistence of clonidine absorption.
- the patch of the present invention includes the above-described adhesive layer
- the control layer and the adhesive layer are laminated and integrated on one surface of the plaster layer in this order.
- a polymer that does not affect the stability of clonidine and can ensure the adhesion between the paste layer and the adhesive layer, or the adhesion between the first paste layer and the second paste layer is suitably used. It is done. Specifically, polyethylene terephthalate, nylon, cellulose acetate, ethyl cellulose, rayon, vinyl acetate-vinyl chloride copolymer, plasticized polyvinyl chloride, polyurethane, polyolefin resin, ethylene-vinyl acetate copolymer, ethylene- (meta ) Methyl acrylate copolymer, polyvinylidene chloride, polyvinyl alcohol and the like. These polymers can be used as a film having no pores or as a porous film having uniform pores. The thickness of the control layer, the size and number of the pores are appropriately adjusted according to the expected control level of the clonidine diffusion rate.
- control layer a control layer made of the polymer and having a large number of through-holes penetrating over both surfaces and a liquid additive impregnated in the porous film is preferably used.
- the control layer in which the porous film made of the polymer is impregnated with the liquid additive the clonidine diffusion rate can be controlled to suppress the change in the clonidine crystal state accompanying the change in temperature to a higher level.
- a liquid additive the thing similar to a paste layer can be used as a liquid additive.
- the porous membrane is preferably made of a polyolefin resin, and more preferably made of polyethylene or polypropylene.
- a porous polyolefin resin film made of a polyolefin resin it is possible to improve the absorption persistence of clonidine.
- the impregnation of the liquid additive into the porous film can be performed by filling the through hole of the porous film with the liquid additive.
- the support is not particularly limited as long as it is flexible but can provide self-supporting property to the patch and prevent the loss of the drug.
- Examples of the material constituting such a support include polyethylene terephthalate, nylon, cellulose acetate, ethyl cellulose, rayon, plasticized vinyl acetate-vinyl chloride copolymer, plasticized polyvinyl chloride, polyurethane, polyethylene, ethylene-acetic acid. Examples thereof include vinyl copolymers, ethylene-methyl (meth) acrylate copolymers, polyvinylidene chloride, aluminum, polyvinyl alcohol, and cotton. Polyethylene terephthalate is preferred.
- the form of the support is not particularly limited, and examples thereof include cloth such as film, foam, nonwoven fabric, woven fabric, and knitted fabric.
- a plurality of supports may be laminated and integrated.
- a laminate film obtained by integrating a flexible resin film such as ethylene-vinyl acetate copolymer or a nonwoven fabric and a polyethylene terephthalate film can be used as the support.
- the light-shielding property and barrier property of a support body can be improved by providing metal foil layers, such as aluminum, and a vapor deposition layer in at least one surface of a support body.
- the method for laminating and integrating a plurality of supports is not particularly limited, and examples thereof include a method using an adhesive and a method using heat fusion.
- a polyethylene terephthalate film is preferably used as the support because it can prevent the patch from being damaged.
- the thickness of the support is preferably 10 to 200 ⁇ m, more preferably 15 to 100 ⁇ m.
- release paper In order to prevent loss of clonidine in the plaster layer and adhesive layer, and to protect the plaster layer and adhesive layer, if the adhesive layer has an adhesive layer, put release paper on the surface of the adhesive layer. It is preferable to laminate so as to be peelable.
- the release paper include resin films and paper made of polyethylene terephthalate, polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, and the like. It is preferable that a release treatment is performed on the surface of the release paper facing the plaster layer.
- the release paper may be composed of a single layer or a plurality of layers. Further, for the purpose of improving the barrier property of the release paper, an aluminum foil or an aluminum vapor deposition layer may be provided on the release paper. Furthermore, when the release paper is made of paper, the release paper may be impregnated with a resin such as polyvinyl alcohol for the purpose of improving the barrier property of the release paper.
- the method for producing the patch is not particularly limited, but a paste layer forming solution is prepared by adding the components constituting the paste layer and, if necessary, a solvent, etc., and mixing the mixture uniformly.
- a method of spreading the solution on the support by a known coating method such as a solvent coating method, a hot melt method, or a calendar method to obtain a plaster layer is used.
- a solvent coating method first, clonidine, the polymer base (A), a liquid additive, and other additives as necessary, and a solvent such as toluene are mixed and stirred until uniform. After the paste layer forming solution is prepared, the paste layer forming solution is applied to one side of the support with a coater and then dried to form a paste layer laminated and integrated on one side of the support. The method to obtain is used. Thereafter, it is preferable to laminate release paper that has been subjected to a release treatment with silicon or the like on one surface of the plaster layer so that the surface that has been subjected to the release treatment faces the plaster layer.
- the paste layer forming solution was applied onto the surface on which the release paper was subjected to the release treatment by the same coating method as described above, and dried.
- a paste layer is formed on the release paper, and a support is laminated and integrated with the paste layer.
- an adhesive layer on one side of the plaster layer In order to form an adhesive layer on one side of the plaster layer, first, clonidine, the polymer base (A), a liquid additive, and other additives as required, and a solvent such as toluene are mixed and uniformly After preparing an adhesive layer forming solution by stirring until it becomes, by applying the adhesive layer forming solution on the surface of the release paper subjected to the release treatment by the same coating method as described above, and drying For example, a method of forming an adhesive layer on the release paper and then laminating and integrating the adhesive layer with the plaster layer is used.
- the clonidine dissolved in the plaster layer is formed on the surface of the plaster layer by setting the weight ratio of the liquid additive within a specific range with respect to the polymer base (A). It becomes possible to suppress concentration. Even if a temperature change occurs during storage, this prevents the clonidine from excessively precipitating on the surface of the paste layer, and a part of the clonidine contained in the paste layer is formed as fine crystals. It is possible to maintain a state where it is uniformly deposited on the whole, and to improve the storage stability of the patch.
- the patch of the present invention since a part of clonidine is uniformly deposited in a fine crystalline state on the entire plaster layer, according to the patch of the present invention, it is possible to continuously absorb a certain amount of clonidine to the skin. It becomes. Furthermore, the patch of the present invention has a high cohesive strength of the plaster layer, and is excellent in stickability and shape retention during storage.
- the patch of the present invention has the above-described configuration, even if a temperature change occurs during storage in the clonidine crystallized preparation, the change in transdermal absorbability is suppressed, and the temperature during distribution and storage (Quality) management can be facilitated.
- Example 1 39 parts by weight of a liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 13 parts by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The mixture was stirred until uniform. Furthermore, 28 parts by weight of a polymer base (A) having a viscosity average molecular weight of 800,000 or more (high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name: Opanol B100) was added to the above mixed solution.
- a liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.)
- a layer forming solution was prepared.
- the obtained plaster layer forming solution was coated on a 38 ⁇ m-thick polyethylene terephthalate (PET) release paper whose surface was siliconized so that the thickness after drying was 50 ⁇ m, and an oven at 80 ° C.
- the paste layer (thickness 50 ⁇ m) was obtained by drying in the container for 60 minutes. Thereafter, a PET film having a thickness of 25 ⁇ m was prepared as a support, and this PET film was laminated on the plaster layer surface and then pressed to integrate the support on the plaster layer surface. 1 patch was obtained.
- Example 2 38 parts by weight of a liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 3 parts by weight of clonidine, 9 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform. Furthermore, 35 parts by weight of a polymer base (A) having a viscosity average molecular weight of 800,000 or more (high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name Opanol B100) was added to the above mixed liquid.
- a liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 9 parts by weight of light anhydrous silicic acid
- Aerosil 200 trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd
- the obtained adhesive layer forming solution was coated on a PET release paper whose surface was silicon-treated so that the thickness after drying was 50 ⁇ m, dried in an oven at 80 ° C. for 60 minutes, and the adhesive layer ( A thickness of 50 ⁇ m) was obtained.
- a 25 ⁇ m-thick porous polypropylene film (manufactured by Celgard, trade name Selgard # 2400) preliminarily impregnated with 9 g / m 2 of a liquid additive (liquid paraffin, trade name High Coal M72) on the adhesive layer surface. ), And the paste layer excluding the PET release paper of Example 1 was bonded onto the porous polypropylene film to obtain a patch of Example 2. In addition, many through-holes penetrating over both surfaces were formed in the porous polypropylene film.
- a liquid additive liquid paraffin, trade name High Coal M72
- Example 3 47 parts by weight of liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 13 parts by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 13 parts by weight of clonidine
- 8 parts by weight of light anhydrous silicic acid trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.
- a polymer base (A) having a viscosity average molecular weight of 800,000 or more high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name: Opanol B100
- Polymer base (B) having an average molecular weight of 10,000 or more and less than 800,000 low molecular weight polyisobutylene: viscosity average molecular weight 36,000, manufactured by BASF, trade name Opanol B10SFN) 3 parts by weight is added, and the mixture is uniformly mixed.
- a body layer forming solution was prepared.
- the obtained plaster layer forming solution was coated on a polyethylene terephthalate release paper whose surface was silicon-treated so that the thickness after drying was 50 ⁇ m, and dried in an oven at 80 ° C. for 60 minutes.
- a plaster layer (thickness 50 ⁇ m) was obtained.
- a PET film having a thickness of 25 ⁇ m was prepared as a support, and this PET film was laminated on the surface of the plaster layer and then pressed to laminate and integrate the support on the surface of the plaster layer.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 3 parts by weight of clonidine
- light anhydrous silicic acid trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.
- toluene A portion was taken and stirred until uniform to obtain a mixed solution.
- the obtained adhesive layer forming solution was coated on a PET release paper whose surface was silicon-treated so that the thickness after drying was 50 ⁇ m, dried in an oven at 80 ° C. for 60 minutes, and the adhesive layer ( A thickness of 50 ⁇ m) was obtained.
- porous polypropylene film manufactured by Celgard, trade name Celgard #
- liquid additive liquid paraffin, trade name Hicoll M72
- Example 4 39 parts by weight of a liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 1 part by weight of clonidine, 9 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform. Furthermore, 36 parts by weight of a polymer base (A) having a viscosity average molecular weight of 800,000 or more (high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name: Opanol B100) was added to the above mixture.
- a liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 9 parts by weight of light anhydrous silicic acid
- Aerosil 200 trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd
- the patch of Example 4 was obtained by performing the same operation as in Example 2 except that this adhesive layer forming solution was used.
- Example 5 28 parts by weight of a liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 13 parts by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- a liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 13 parts by weight of clonidine
- 8 parts by weight of light anhydrous silicic acid trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.
- a polymer base (A) having a viscosity average molecular weight of 800,000 or more high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF Corporation, trade name Opanol B100
- the obtained plaster layer forming solution was coated on a polyethylene terephthalate release paper (thickness: 38 ⁇ m) whose surface was silicon-treated so that the thickness after drying was 50 ⁇ m, and the 90% in an oven at 80 ° C.
- the paste layer (thickness 50 ⁇ m) was obtained by drying for a minute.
- a PET film having a thickness of 25 ⁇ m was prepared as a support, and this PET film was laminated on the surface of the plaster layer and then pressed to laminate and integrate the support on the surface of the plaster layer.
- liquid additive liquid paraffin, manufactured by Kaneda Corp., trade name: High Coal M72
- clonidine 9 parts by weight of light anhydrous silicic acid
- toluene A portion was taken and stirred until uniform to obtain a mixed solution.
- a polymer base (A) having a viscosity average molecular weight of 800,000 or more high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name: Opanol B100 was added to the above mixture.
- the obtained adhesive layer forming solution was coated on a PET release paper whose surface was silicon-treated so that the thickness after drying was 50 ⁇ m, dried in an oven at 80 ° C. for 60 minutes, and the adhesive layer ( A thickness of 50 ⁇ m) was obtained.
- porous polypropylene film manufactured by Celgard, trade name Celgard #
- liquid additive liquid paraffin, trade name Hicoll M72
- Table 4 shows the amounts of clonidine, polymer substrate (A), polymer substrate (B), liquid additive, and light anhydrous silicic acid in the plaster layer and the adhesive layer, and the thickness of the adhesive layer.
- a patch was prepared in the same manner as in Example 5, except that the procedure was changed as described in 5 and 5.
- Example 11 47 parts by weight of liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 1 part by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 1 part by weight of clonidine
- 8 parts by weight of light anhydrous silicic acid trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.
- 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- a polymer base (A) having a viscosity average molecular weight of 800,000 or more high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF Corporation, trade name: Opanol B100
- the obtained adhesive layer forming solution was coated on a polyethylene terephthalate release paper (thickness 38 ⁇ m) whose surface was silicon-treated so that the thickness after drying would be 50 ⁇ m, and 90 minutes in an oven at 80 ° C.
- the adhesive layer (I) (thickness 50 ⁇ m) was obtained by drying.
- a pressure-sensitive adhesive layer forming solution was prepared in the same manner as described above, and the obtained pressure-sensitive adhesive layer forming solution was dried on a polyethylene terephthalate release paper (thickness 38 ⁇ m) whose surface was siliconized. The coating was applied to a thickness of 30 ⁇ m and dried in an oven at 80 ° C. for 90 minutes to obtain an adhesive layer (II) (thickness 30 ⁇ m). Two adhesive layers (II) were prepared by such a procedure.
- the two adhesive layers (II) excluding the PET release paper are respectively bonded to the surface of the adhesive layer (I) formed on the PET release paper, thereby providing an adhesive layer (thickness 110 ⁇ m).
- Got. 25 ⁇ m thick porous polypropylene film manufactured by Celgard, trade name Celgard #
- liquid additive liquid paraffin, trade name Hicoll M72
- many through-holes penetrating over both surfaces were formed in the porous polypropylene film.
- Example 12 47 parts by weight of liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 1 part by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 1 part by weight of clonidine
- 8 parts by weight of light anhydrous silicic acid trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.
- 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- a polymer base (A) having a viscosity average molecular weight of 800,000 or more high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF Corporation, trade name: Opanol B100
- the obtained adhesive layer forming solution was coated on a polyethylene terephthalate release paper (thickness 38 ⁇ m) whose surface was silicon-treated so that the thickness after drying would be 50 ⁇ m, and 90 minutes in an oven at 80 ° C.
- the adhesive layer (I) (thickness 50 ⁇ m) was obtained by drying. Three adhesive layers (I) were produced by such a procedure.
- Example 12 was obtained in the same manner as in Example 11 except that the adhesive layer thus prepared was used.
- Example 13 47 parts by weight of liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 1 part by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 1 part by weight of clonidine
- 8 parts by weight of light anhydrous silicic acid trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.
- a polymer base (A) having a viscosity average molecular weight of 800,000 or more high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF Corporation, trade name: Opanol B100
- the obtained adhesive layer forming solution was coated on a polyethylene terephthalate release paper (thickness 38 ⁇ m) whose surface was silicon-treated so that the thickness after drying would be 50 ⁇ m, and 90 minutes in an oven at 80 ° C.
- the adhesive layer (I) (thickness 50 ⁇ m) was obtained by drying.
- Four adhesive layers (I) were produced by such a procedure.
- Example 13 was obtained in the same manner as in Example 11 except that the adhesive layer thus prepared was used.
- Comparative Example 1 47 parts by weight of liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 13 parts by weight of clonidine, 8 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts of toluene are uniformly used. The mixture was stirred until Furthermore, 20 parts by weight of a polymer base (A) having a viscosity average molecular weight of 800,000 or more (high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name: Opanol B100) was added to the liquid mixture.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 8 parts by weight of light anhydrous silicic acid
- Aerosil 200 manufactured by Nippon Aerosil Co., Ltd.
- Polymer base (B) having a molecular weight of 10,000 or more and less than 800,000 (low molecular weight polyisobutylene: viscosity average molecular weight 36,000, manufactured by BASF, trade name Opanol B10SFN) 12 parts by weight are added and mixed to obtain a paste.
- a layer forming solution was prepared.
- a patch of Comparative Example 1 was obtained in the same manner as in Example 1 except that this plaster layer forming solution was used.
- Comparative Example 2 47 parts by weight of liquid additive (liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72), 3 parts by weight of clonidine, 9 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.), and 560 parts by weight of toluene The resulting mixture was stirred until uniform. Further, 29 parts by weight of a polymer base (A) having a viscosity average molecular weight of 800,000 or more (high molecular weight polyisobutylene: viscosity average molecular weight 1,100,000, manufactured by BASF, trade name: Opanol B100) was added to the above mixed solution.
- liquid additive liquid paraffin, manufactured by Kaneda Corporation, trade name: High Coal M72
- clonidine 9 parts by weight of light anhydrous silicic acid (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.)
- the obtained adhesive layer forming solution was coated on a 38 ⁇ m PET release paper whose surface was silicon-treated so that the thickness after drying would be 50 ⁇ m, dried in an oven at 80 ° C. for 60 minutes, and an adhesive layer ( A thickness of 50 ⁇ m) was obtained.
- the plaster layer except for was bonded on a porous polypropylene film to obtain a patch of Comparative Example 2.
- many through-holes penetrating over both surfaces were formed in the porous polypropylene film.
- Example 1 and Example 3 were different from Comparative Example 1 in the crystal form of clonidine in the plaster layer immediately after production.
- Example 1 and Example 3 the disappearance of clonidine crystals was negligible even after storage at 60 ° C. for 1 month, but in Comparative Example 1, the disappearance of clonidine crystals was evident.
- Example 1 and Example 3 the difference in the crystal form of clonidine due to the difference in storage temperature was slight, but in Comparative Example 1, the change in the crystal form of clonidine was significantly different depending on the storage temperature. From the above, it was confirmed that in the plaster layer of the patch of the present invention, there was little change in the crystalline state of clonidine due to temperature change during storage.
- Example 2 Example 4 and Example 3, the change in the amount of clonidine permeation due to the change in storage temperature was not observed or slight. On the other hand, in Comparative Example 2, the change in clonidine permeation amount due to the change in storage temperature was significant.
- the plaster layer of the patch of the present invention improves the stability of absorption performance against temperature changes during storage.
- the patches of Examples 5 to 8 and Comparative Example 3 were stored at 25 ° C., 2 weeks, or 60 ° C. for 2 weeks, and then each 1.8 cm rounded square test piece (patch) Area: 3 cm 2 ) was cut out.
- the skin extracted from the back of a hairless mouse male, 8 weeks old was fixed to a Franz diffusion cell maintained at 37 ° C., and the test piece was adhered to the upper end of the skin after removing the release paper. Affixed by layer.
- the physiological saline adjusted to pH 7.2 was used as a receptor solution, and the lower end of the skin was immersed in the receptor solution.
- Example 5 In calculating the amount of clonidine permeation, since the receptor solution was collected before that, the amount of collected receptor solution was corrected.
- the results of Example 5 and Comparative Example 3 are shown in FIG. 4, the results of Examples 6 and 7 are shown in FIG. 5, and the result of Example 8 is shown in FIG.
- the patches of Examples 9 to 13 were stored at 25 ° C. for 2 weeks, and then a 1.8 cm rounded square test piece (applied area: 3 cm 2 ) was cut from each of the above patches.
- the skin extracted from the back of a hairless mouse male, 8 weeks old
- was fixed to a Franz diffusion cell maintained at 37 ° C. and the test piece was adhered to the upper end of the skin after removing the release paper. Affixed by layer.
- the physiological saline adjusted to pH 7.2 was used as a receptor solution, and the lower end of the skin was immersed in the receptor solution.
- test pieces each having a rectangular shape of 2.5 ⁇ 5.0 cm were cut out from the adhesive layer before bonding, and the release paper was removed.
- One end of the removed test piece in the horizontal direction is attached to a stainless steel test plate (sticking surface 2.5 ⁇ 2.5 cm), and a 2 kg rubber roller is reciprocated once on the test piece at a speed of 5 mm / sec.
- the test piece was pressure-bonded to the test plate and then left at 40 ° C. for 20 minutes. Attach a 300g weight to the other end of the test piece in the horizontal direction, and support the weight so that no load is applied to the test piece. While raising the test plate and the test piece vertically, release the weight support.
- Example 2 Evaluation of adhesive properties; ball tack test
- Example 3 Example 3, and Comparative Example 2
- rectangular test pieces each having a length of 3 cm and a width of 4 cm were cut out from the pressure-sensitive adhesive layers before bonding, and the release paper was removed from the test pieces. Then, the test piece was fixed to the 30 ° inclined surface of the ball tack tester so that only the intermediate portion (width 3 cm ⁇ length 3 cm) in the lateral direction of the adhesive layer was exposed.
- a steel ball in accordance with JIS Z0237 was rolled from the upper side 10 cm away along the inclined surface from the upper end of the exposed adhesive layer in the test piece, and whether or not the steel ball stopped on the test piece was observed.
- Example 2 It was found that the steel ball stopped on the test pieces of Example 2 and Example 3 had a sufficient tack force although it was smaller than the test piece of Comparative Example 2. From the above, it was confirmed that the patch of the present invention has adhesiveness comparable to that of the patch of Comparative Example 2.
- a patch in which the dissolution / precipitation behavior of clonidine existing in a crystalline state in the plaster layer due to temperature change during storage is stabilized.
- a patch can facilitate temperature (quality) management during distribution and storage.
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Abstract
Description
貼付剤の膏体層には、有効成分(主薬)として遊離塩基型のクロニジン(2,6-ジクロロ-N-2-イミダゾリジニリデンベンゼンアミン)が含有されている。遊離塩基型のクロニジンは、クロニジン塩酸塩及びクロニジンフマル酸塩などのクロニジンと、無機酸又は有機酸との塩を含まない。
本発明の貼付剤の膏体層に含有させる高分子基剤としては、粘度平均分子量が80万以上の高分子基剤(A)が用いられる。粘度平均分子量が80万以上の高分子基剤(A)が一定以上の割合で膏体層中に含有される場合、クロニジンの保存安定性が高まることが本発明者らにより確認されている。このような効果が得られる詳細な機構は、明らかではないが、膏体層中に含まれているクロニジンの結晶状態を安定化することができ、これにより、保存時の温度変化によって、膏体層中で、結晶状態で存在するクロニジンが溶解したり析出したりすることを高く低減できることがメカニズムの一つとして推測される。
本発明の貼付剤には、その膏体層を皮膚に貼付することで、膏体層中に含有させているクロニジンを皮膚を介して吸収させ、クロニジンの経皮吸収速度を一定に持続できることが要求される。このようにクロニジンの経皮吸収速度を一定に保つためには、膏体層表面におけるクロニジンの溶解性及び拡散性を一定の状態に持続させることが必要となる。本発明では、膏体層にクロニジンを溶解させることができる液状添加剤を一定量以上含有させ、さらに、膏体層中における粘度平均分子量が80万以上の高分子基剤(A)に対する液状添加剤の重量比を一定の範囲内にすることにより、クロニジンの経皮吸収速度を一定に維持できること、さらには膏体層の保存安定性及び貼付性を良好にできることを見出した。
膏体層は、その性能を失わない範囲で、膏体層中に、充填剤、安定化剤、粘着力調整剤等の添加剤を含有していてもよい。例えば、充填剤としては、膏体層の貼付性の調整や、薬物放出性の調整のために添加することができる。このような充填剤としては、例えば、炭酸カルシウム、酸化チタン、乳糖、結晶セルロース、無水ケイ酸、ベントナイト、タルクなどが挙げられる。なかでも、クロニジンの安定性や膏体層の貼付性を確保することができることから、無水ケイ酸が好ましく、軽質無水ケイ酸がより好ましく挙げられる。
膏体層の一面に膏体層よりもクロニジンの含有量(重量%)の少ない粘着層が積層一体化されていることが好ましい。粘着層は、通常、膏体層の皮膚の面する側に積層一体化される。粘着層を設けることによってクロニジンの経皮吸収性と持続性を保持しつつ、皮膚への貼付性をより高めることができる。
本発明の貼付剤が、上述した第1の膏体層及び第2の膏体層を含む場合、第1の膏体層と第2の膏体層との間に制御層を設けることが好ましい。第1の膏体層、制御層、及び第2の膏体層はこの順で支持体の一面に積層一体化されて用いられる。このように制御層を設けることによって、クロニジン吸収の持続性をさらに高めることができる。
支持体は、柔軟であるが貼付剤に自己支持性を付与し且つ薬物の損失を防止する役目を果たすことができれば、特に制限されない。このような支持体を構成する材料としては、例えば、ポリエチレンテレフタレート、ナイロン、酢酸セルロース、エチルセルロース、レーヨン、可塑化酢酸ビニル-塩化ビニル共重合体、可塑化ポリ塩化ビニル、ポリウレタン、ポリエチレン、エチレン-酢酸ビニル共重合体、エチレン-(メタ)アクリル酸メチル共重合体、ポリ塩化ビニリデン、アルミニウム、ポリビニルアルコール、綿などが挙げられ、ポリエチレンテレフタレートが好ましい。
膏体層や粘着層中のクロニジンの損失防止、及び膏体層や粘着層を保護する目的で、膏体層表面、又は貼付剤が粘着層を有する場合には粘着層の表面に離型紙を剥離可能に積層しておくのが好ましい。上記離型紙としては、例えば、ポリエチレンテレフタレート、ポリエチレン、ポリプロピレン、ポリ塩化ビニル、ポリ塩化ビニリデンなどからなる樹脂フィルムや紙などが挙げられる。離型紙の膏体層と対向させる面に離型処理が施されていることが好ましい。なお、上記離型紙は、単層からなっても、複数層からなってもよい。また、上記離型紙のバリア性を向上させる目的で、離型紙にアルミ箔やアルミ蒸着の層を設けてもよい。さらに、上記離型紙が紙からなる場合、離型紙のバリア性を向上させる目的で、離型紙にポリビニルアルコールなどの樹脂を含浸させてもよい。
次に、本発明の貼付剤の製造方法を説明する。貼付剤の製造方法は、特に限定されないが、膏体層を構成する成分及び必要に応じて溶剤等を加えて均一に混合することにより膏体層形成用溶液を調製し、この膏体層形成用溶液を溶剤塗工法、ホットメルト法、カレンダー法などの公知の塗工法で支持体上に展延して膏体層を得る方法が用いられる。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)39重量部、クロニジン13重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560重量部を均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100)28重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)12重量部を加え、均一に混合して膏体層形成用溶液を調製した。得られた膏体層形成用溶液を、表面をシリコン処理した38μm厚さのポリエチレンテレフタレート(PET)製離型紙上に、乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で60分間乾燥させることにより膏体層(厚さ50μm)得た。その後、支持体として25μm厚さのPETフィルムを用意し、このPETフィルムを膏体層表面に積層させた後に押圧することによって、膏体層表面に支持体を積層一体化させることにより、実施例1の貼付剤を得た。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)38重量部、クロニジン3重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)9重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100)35重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)15重量部を加え、均一に混合して粘着層形成用溶液を調製した。得られた粘着層形成用溶液を、表面をシリコン処理したPET製離型紙上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で60分間乾燥し、粘着層(厚さ50μm)を得た。上記粘着層表面に、液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)を9g/m2の量で予め含浸した25μm厚さの多孔ポリプロピレンフィルム(セルガード社製、商品名セルガード#2400)を積層し、さらに実施例1のPET製離型紙を除いた膏体層を多孔ポリプロピレンフィルム上に貼り合わせ、実施例2の貼付剤を得た。なお、多孔ポリプロピレンフィルムには両面間に亘って貫通する多数の貫通孔が形成されていた。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)47重量部、クロニジン13重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100、)29重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)3重量部を加え、均一に混合して膏体層形成用溶液を調製した。得られた膏体層形成用溶液を、表面をシリコン処理したポリエチレンテレフタレート製離型紙上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で60分間乾燥させることにより膏体層(厚さ50μm)得た。その後、支持体として25μm厚さのPETフィルムを用意し、このPETフィルムを膏体層表面に積層させた後に押圧することによって、膏体層表面に支持体を積層一体化させた。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)39重量部、クロニジン1重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)9重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100)36重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)15重量部を加え、均一に混合して粘着層形成用溶液を調製した。この粘着層形成用溶液を用いた以外は、実施例2と同様の操作を行い、実施例4の貼付剤を得た。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)28重量部、クロニジン13重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100、)40重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)11重量部を加え、均一に混合して膏体層形成用溶液を調製した。得られた膏体層形成用溶液を、表面をシリコン処理したポリエチレンテレフタレート製離型紙(厚さ38μm)上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で90分間乾燥させることにより膏体層(厚さ50μm)得た。その後、支持体として25μm厚さのPETフィルムを用意し、このPETフィルムを膏体層表面に積層させた後に押圧することによって、膏体層表面に支持体を積層一体化させた。
膏体層及び粘着層中におけるクロニジン、高分子基材(A)、高分子基材(B)、液状添加剤、及び軽質無水ケイ酸の配合量、並びに粘着層の厚さを、それぞれ表4及び5に記載した通りに変更した以外は、実施例5と同様にして貼付剤を作製した。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)47重量部、クロニジン1重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100、)30重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)14重量部を加え、均一に混合して粘着層形成用溶液を調製した。得られた粘着層形成用溶液を、表面をシリコン処理したポリエチレンテレフタレート製離型紙(厚さ38μm)上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で90分間乾燥させることにより粘着層(I)(厚さ50μm)得た。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)47重量部、クロニジン1重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100、)30重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)14重量部を加え、均一に混合して粘着層形成用溶液を調製した。得られた粘着層形成用溶液を、表面をシリコン処理したポリエチレンテレフタレート製離型紙(厚さ38μm)上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で90分間乾燥させることにより粘着層(I)(厚さ50μm)得た。このような手順により粘着層(I)を3層作製した。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)47重量部、クロニジン1重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100、)30重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)14重量部を加え、均一に混合して粘着層形成用溶液を調製した。得られた粘着層形成用溶液を、表面をシリコン処理したポリエチレンテレフタレート製離型紙(厚さ38μm)上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で90分間乾燥させることにより粘着層(I)(厚さ50μm)得た。このような手順により粘着層(I)を4層作製した。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)47重量部、クロニジン13重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)8重量部、及びトルエン560部を均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100)20重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)12重量部を加え、均一に混合して膏体層形成用溶液を調製した。この膏体層形成用溶液を用いた以外は、実施例1と同様の操作を行い、比較例1の貼付剤を得た。
液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)47重量部、クロニジン3重量部、軽質無水ケイ酸(日本アエロジル社製、商品名アエロジル200)9重量部、及びトルエン560重量部を取り、均一になるまで撹拌して混合液を得た。さらに、上記混合液に粘度平均分子量80万以上の高分子基剤(A)(高分子量ポリイソブチレン:粘度平均分子量1,100,000、BASF社製、商品名 オパノールB100)29重量部、粘度平均分子量1万以上80万未満の高分子基剤(B)(低分子量ポリイソブチレン:粘度平均分子量36,000、BASF社製、商品名 オパノールB10SFN)12重量部を加え、均一に混合して粘着層形成用溶液を調製した。得られた粘着層形成用溶液を、表面をシリコン処理した38μmPET製離型紙上に乾燥後の厚さが50μmとなるように塗工し、80℃のオーブン中で60分間乾燥し、粘着層(厚さ50μm)を得た。上記粘着層表面に、液状添加剤(流動パラフィン、カネダ社製、商品名ハイコールM72)を9g/m2の量で含浸した25μm厚さの多孔ポリプロピレンフィルムを積層し、さらに比較例1の離型紙を除いた膏体層を多孔ポリプロピレンフィルム上に貼り合わせ、比較例2の貼付剤を得た。なお、多孔ポリプロピレンフィルムには両面間に亘って貫通する多数の貫通孔が形成されていた。
1.偏光顕微鏡による結晶観察(製造直後)
実施例及び比較例において離型紙上に作製した、PETフィルムと積層一体化させる前の製造直後の各膏体層を上記離型紙から剥離した後、上記膏体層を一辺が2cmの正方形状に切断して観察用試料を得た。次に、上記観察用試料を100倍の倍率で偏光顕微鏡にて観察し、写真撮影を行った。得られた写真を観察することにより、結晶状態のクロニジンの有無を判断した。結晶径が1μm以上の結晶が観察された場合、結晶状態のクロニジンが析出していると判断した。なお、結晶径とは、写真上において結晶を包囲し得る最小径の真円の直径を意味する。そして、実施例及び比較例において作製した全ての膏体層中に結晶状態のクロニジンが析出していることが確認された。
実施例1、実施例3、及び比較例1において離型紙上に作製した、PETフィルムと積層一体化させる前の製造直後の各膏体層を上記離型紙から剥離した後、上記膏体層を一辺が2cmの正方形状に3枚切断して観察用試料を得た。次に、上記観察用試料を100倍の倍率で偏光顕微鏡にて観察し、写真撮影を行った。観察用試料をそれぞれアルミ包材に封入した後、25℃、40℃、及び60℃の温度雰囲気下で保存した。1箇月間経過後、各観察用試料を取り出して速やかに製造直後と同じ観察部位について観察と撮影を行い、クロニジンの結晶状態を比較した。結果を表1に示した。
実施例2、3、4及び比較例2の貼付剤を25℃、1箇月あるいは60℃1箇月保存した後、上記貼付剤からそれぞれ一片1.8cmの角丸正方形状の試験片(貼付面積:3cm2)を切り出した。一方、37℃に保持されたFranzの拡散セルに、ヘアレスマウス(雄、8週齢)の背部から摘出した皮膚を固定し、この皮膚の上端部に離型紙を除去した後の試験片の粘着層によって貼付した。なお、pH7.2に調整した生理食塩水をリセプター液とし、このリセプター液中に皮膚の下端部を浸漬した。試験片を皮膚に貼付してから、3時間、6時間、24時間、30時間、及び48時間後に、皮膚下側のリセプター液を採取し、クロニジン濃度をHPLCを用いて測定した。そして、所定の時間が経過する毎に、クロニジン濃度[N(mg/mL)]とリセプター液量[W(mL)]から求められる試験片の単位面積あたりのクロニジン透過量[Q(mg/cm2)]を式:Q(mg/cm2)=N(mg/mL)×W(mL)/3(cm2)により算出し、その値を累積皮膚透過量とした。なお、クロニジン透過量を算出するにあたっては、それ以前にリセプター液を採取しているので、このリセプター液の採取量について補正を加えた。実施例2及び4の結果を図1に示し、実施例3の結果を図2に示し、比較例2の結果を図3に示した。
実施例2、実施例3及び比較例2において、貼り合わせる前の粘着層からそれぞれ縦2.5×横5.0cmの平面長方形状の試験片を切り出し、離型紙を除いた上記試験片をその横方向の一端部をステンレス製の試験板(貼付面2.5×2.5cm)に貼着し、2kgのゴムローラーを5mm/秒のスピードで試験片上を一往復させ、試験片を試験板に圧着した後、40℃で20分放置した。試験片の横方向の他端部に300g分銅を取り付け、分銅を支持して試験片に荷重が掛からないようにしながら、試験板及び試験片を垂直に起立させた後、分銅の支持を解除して試験片に分銅の荷重が加わるようにした。分銅の支持を解除してから試験片が試験板から落下するまでの時間を測定した。60分経過後も試験片が落下しない場合は、試験片がずれた距離(mm)を測定した。結果を表2に示した。
実施例2、実施例3及び比較例2において、貼り合わせる前の粘着層からそれぞれ縦3cm×横4cmの長方形状の試験片を切り出し、試験片から離型紙を除いた後、試験片をその粘着層における横方向における中間部(幅3cm×長さ3cm)だけが露出するようにしてボールタック試験器の30°傾斜面に固定した。試験片における露出している粘着層の上端から傾斜面に沿って上方に10cm離れた上方からJIS Z0237に準拠したスチールボールを転がし、スチールボールが試験片上にて停止するか否かを観察した。スチールボールが試験片上で停止せずに試験片を通過した場合には、より大きさの小さいスチールボールを上述と同様の要領で転がした。上述の要領を繰り返して、試験片上で停止したスチールボールのうち最小の大きさを有するスチールボールの大きさを測定した。結果を表3に示した。スチールボール番号が大きくなるほど、スチールボールの大きさが大きくなる。
Claims (9)
- 支持体と、
上記支持体の一面に積層一体化され、結晶状態のクロニジンを含むクロニジン5~30重量%と、粘度平均分子量が80万以上である高分子基剤(A)25~90重量%と、上記クロニジンを溶解させることができる液状添加剤5~60重量%とを含有し、且つ上記高分子基剤(A)に対する上記液状添加剤の重量比[液状添加剤/高分子基剤(A)]が、0.1~2.0である膏体層と、
を含むことを特徴とする貼付剤。 - 膏体層における高分子基剤(A)の含有量が、25~85重量%であることを特徴とする請求項1に記載の貼付剤。
- 膏体層が、粘度平均分子量が1万以上80万未満の高分子基剤(B)1~69重量%を含有することを特徴とする請求項2に記載の貼付剤。
- 高分子基剤(A)が、ゴム系粘着剤又は極性官能基を有していない(メタ)アクリル酸アルキルエステル共重合体を含むことを特徴とする請求項1に記載の貼付剤。
- 高分子基剤(A)が、ポリイソブチレンを含むことを特徴とする請求項1に記載の貼付剤。
- 液状添加剤が、流動パラフィンを含むことを特徴とする請求項1に記載の貼付剤。
- 膏体層の一面に積層一体化された粘着層であり、クロニジン0.5~3重量%と、粘度平均分子量が80万以上である高分子基剤(A)25~90重量%と、上記クロニジンを溶解させることができる液状添加剤5~60重量%と含有し、且つ上記高分子基剤(A)に対する上記液状添加剤の重量比[液状添加剤/高分子基剤(A)]が、0.1~2.0である上記粘着層を有することを特徴とする請求項1に記載の貼付剤。
- 粘着層が、粘度平均分子量が1万以上80万未満の高分子基剤(B)1~25重量%を含有することを特徴とする請求項7に記載の貼付剤。
- 膏体層と粘着層との間に介在する制御層であり、両面間に亘って貫通する多数の貫通孔を有し且つポリオレフィン系樹脂からなる多孔膜と上記貫通孔に充填されている液状添加剤とを含有する上記制御層を含むことを特徴とする請求項7に記載の貼付剤。
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JP2012541906A JP6148861B2 (ja) | 2010-11-02 | 2011-11-02 | 貼付剤 |
CN2011800638892A CN103313710A (zh) | 2010-11-02 | 2011-11-02 | 贴剂 |
KR1020137013856A KR20130108406A (ko) | 2010-11-02 | 2011-11-02 | 첩부제 |
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JP2020066679A (ja) * | 2018-10-24 | 2020-04-30 | 凸版印刷株式会社 | 貼付剤支持体用フィルム、積層体及び貼付剤 |
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US10940121B2 (en) | 2015-02-24 | 2021-03-09 | Hisamitsu Pharmaceutical Co., Inc. | Gel patch |
CN105311002A (zh) * | 2015-10-22 | 2016-02-10 | 安徽一灵药业有限公司 | 一种可乐定控释贴片的制备方法 |
US11903915B2 (en) | 2019-02-14 | 2024-02-20 | Hisamitsu Pharmaceutical Co., Inc. | Poultice |
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- 2011-11-02 JP JP2012541906A patent/JP6148861B2/ja not_active Expired - Fee Related
- 2011-11-02 WO PCT/JP2011/075354 patent/WO2012060431A1/ja active Application Filing
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US9173855B2 (en) | 2015-11-03 |
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JP6148861B2 (ja) | 2017-06-14 |
CN103313710A (zh) | 2013-09-18 |
JPWO2012060431A1 (ja) | 2014-05-12 |
US20130261572A1 (en) | 2013-10-03 |
EP2636408A4 (en) | 2016-07-20 |
EP2636408A1 (en) | 2013-09-11 |
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