JPH062668B2 - Patch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a patch having an adhesive layer containing a drug on the surface of a support, and in particular, the drug has a high transdermal absorbability and a long time. The present invention relates to a patch that does not reduce the adhesiveness.

(Prior Art) In order to obtain a systemic or topical drug effect, an adhesive patch containing a drug (physiologically active substance) in an adhesive layer is applied to the skin surface, and the drug is absorbed through the skin. It is being appreciated. The transdermal administration method using such a patch has many advantages over conventional oral administration methods. For example, when a drug is orally administered, the drug absorbed in the intestine is circulated to the liver and metabolized, so that a considerable amount of the drug is decomposed before its drug effect is exerted. In contrast, in the transdermal administration method, the absorbed drug does not pass through the liver during the first circulation in the body. Therefore, metabolism in the liver does not significantly reduce drug efficacy. Oral administration of non-steroidal anti-inflammatory drugs is more likely to cause gastrointestinal disorders, but transdermal administration is less likely to cause such gastrointestinal disorders. By controlling the absorbability of a drug, it is possible to reduce the side effects caused by a large amount of the drug being absorbed in a short time. The frequency of drug administration can be reduced if a constant blood concentration can be maintained for a long time.

However, even if a drug is administered using a patch, the drug is unlikely to penetrate the skin and bioavailability is often low. Since the stratum corneum on the skin surface has a barrier function of preventing foreign substances from entering the body, a sufficient amount of drug capable of exerting a pharmacological effect is not absorbed through the skin.

A patch containing an absorption enhancer has been produced in order to weaken the barrier function of the stratum corneum and absorb a sufficient amount of a drug. For example, JP-A-57-9714, JP-B-58-43368, JP-A-58-52216, JP-A-59-27978,
Japanese Patent Publication No. 59-7688, Japanese Patent Publication No. 60-19890, JP 6
Japanese Unexamined Patent Publication No. 0-13720 and Japanese Unexamined Patent Publication No. 60-11431 disclose a patch containing an absorption promoter in an adhesive layer.

Among the above absorption enhancers, for example, salicylic acid, urea, and dimethyl sulfoxide are known to dissolve keratin, but even if these are added, the transdermal absorbability of the drug is not necessarily good. Propylene glycol, glycerin, sodium pyrrolidonecarboxylate, etc. can retain water in the stratum corneum, but almost no drug absorption promoting effect is observed.
Dimethylsulfoxide is irritating to the skin and easily causes erythema and rash. When a dicarboxylic acid ester such as diisopropyl adipate or a fatty acid ester is contained in the pressure-sensitive adhesive layer, the compatibility between the pressure-sensitive adhesive and the drug decreases, and the drug is likely to precipitate from the pressure-sensitive adhesive. The tackiness may decrease. Sulfur-containing compounds such as calcium thioglycolate also cause malodors. In addition to the above compounds, myristic acid ester, adipic acid ester, lauryl sulfate ester, polyoxyethylene alkyl ether, etc. are disclosed, but even if these absorption promoters are used, the absorption amount of the drug through the skin is not always sufficient. It cannot be said that there is. Thus, the current situation is that there is no patch available that can effectively absorb the drug.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional drawbacks, and an object thereof is to provide a patch capable of effectively absorbing the contained drug through the skin. is there. Another object of the present invention is to provide a patch containing an absorption enhancer in the pressure-sensitive adhesive layer, which enhances the transdermal absorbability of a drug and is non-irritating to the skin and safe to the living body. Still another object of the present invention is to provide a patch containing an absorption enhancer, which does not reduce the adhesiveness of the adhesive, does not cause the drug to precipitate, and does not cause denaturation of the contained drug. To provide the agent.

(Means for Solving Problems) The patch of the present invention is a patch in which an adhesive layer containing a drug, a surfactant and a fatty acid ester is provided on the surface of a support, and the surfactant is a fatty acid. A dialkylolamide and / or a fatty acid dialkylolamide is an alkylene oxide adduct, wherein the fatty acid forming the surfactant and the fatty acid forming the fatty acid ester each have 6 to 18 carbon atoms. The above object is achieved.

The surfactant used in the present invention acts as a transdermal absorption enhancer for the drug contained therein. Such surfactants are fatty acid dialkylol amides (I) and / or alkylene oxide adducts (II) of fatty acid dialkylol amides of the formula: R ₁ CON (R ₂ —OH) ₂ (I) R ₃ CON _{[R 4 O- (R 5 O)} n -H ] ₂ (II) wherein R _1, R ₃ is an aliphatic hydrocarbon group having 5 to 17 carbon atoms; R _2,
R ₄ is a saturated hydrocarbon group having 2 to 6 carbon atoms; R ₅ is 2 to 4 carbon atoms
Saturated hydrocarbon group; n is an integer of 1 to 40.

The fatty acids capable of forming the above compounds have 6 to 18 carbon atoms.
(Corresponding R ₁ and R ₃ have 5 to 17 carbon atoms), and preferably 8 to 16. When the carbon number is out of the range of 6 to 18, the absorbability of the drug contained in the adhesive layer is lowered. Examples of fatty acids include caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, hexadecenoic acid, oleic acid, and linoleic acid. These may be used as a mixture of two or more kinds. For example, coconut oil fatty acid which is a mixture thereof is preferably used.

The above compound (I) is obtained by condensing dialkylol amine HN (R ₂ OH) ₂ with these fatty acids. The saturated hydrocarbon group R ₂ of the dialkylol amine used has 2 to 6 carbon atoms. Within this range, the smaller the carbon number, the better the drug absorption. Examples of the dialkylol amine include diethanolamine, diisopropanolamine, dibutanolamine, and dihexanolamine.

When alkylene oxide is further added to the fatty acid dialkylolamide (I), an alkylene oxide adduct of fatty acid dialkylolamide (polyoxyalkylene fatty acid dialkylolamide) (II) is obtained.
The addition of alkylene oxide improves the resistance to hydrolysis, which improves the stability of the drug.
This effect is remarkable when the drug is alkaline and unstable. The addition mole number of alkylene oxide is 1 to 40, preferably 1 to 20. Here, "the number of added moles is 1" means a state in which one molecule of alkylene oxide is added to each of the two hydroxyl groups in the fatty acid dialkylolamide. In other words, it means a state in which 2 molecules of alkylene oxide are added to 1 molecule of fatty acid dialkylamide. If the number of added moles exceeds 40, the drug absorbability will decrease. Two or more kinds of surfactants may be mixed and used. The alkylene group of alkylene oxide has 2 to 4 carbon atoms, and ethylene oxide, propylene oxide, and butylene oxide are used.

The above-mentioned surfactant is contained in the pressure-sensitive adhesive layer containing the pressure-sensitive adhesive, the surfactant and the below-mentioned fatty acid ester in an amount of 0.1 to 20% by weight, preferably 0.1 to 10% by weight. If the amount of the surfactant is too small, the drug absorption promoting effect cannot be obtained. If it is excessive, the surfactant will leach out from the adhesive layer.

The initial tackiness of the pressure-sensitive adhesive to which the above-mentioned surfactant is added is good, but the tackiness tends to be slightly decreased with time, and the patch tends to be easily peeled off from the skin surface. Therefore, a fatty acid ester is added for the purpose of ensuring the temporal stability of the adhesive force. This fatty acid ester consists of an ester of a fatty acid and an alkyl alcohol, and the fatty acid has 6 carbon atoms.
~ 18, and the alkyl alcohol has 1 to 20 carbon atoms,
It is preferably 2 to 14. Examples of such fatty acid ester include isopropyl myristate, isopropyl palmitate, isopropyl stearate, butyl stearate, octyldodecyl myristate, and hexyl laurate.

When the above fatty acid ester is added, the tackiness of the pressure-sensitive adhesive described below is improved. Furthermore, since the fatty acid ester makes the skin and the adhesive easier to adapt to each other, the decrease in the adhesiveness due to the surfactant is suppressed and the adhesive force lasts for a long time. The presence of the fatty acid ester increases the diffusion rate of the drug and surfactant in the adhesive matrix, which enhances the action of the surfactant and the adhesiveness of the adhesive layer to the skin is sufficient. Will improve further. Thus, the fatty acid ester has both effects of imparting tackiness and promoting percutaneous absorption of the drug.

The fatty acid ester is contained in the adhesive layer in an amount of 0.5 to 50% by weight, preferably 0.5 to 20% by weight. If the amount is too small, the effect of maintaining tackiness cannot be obtained. When it is excessive, the fatty acid ester is leached from the adhesive layer.

The drug (physiologically active substance) used is not particularly limited as long as it can penetrate the skin by transdermal administration. For example, non-steroidal anti-inflammatory drug, steroidal anti-inflammatory drug, vasodilator, antiarrhythmic drug, antihypertensive drug, antitumor drug,
Local anesthetics, hormones, antihistamines, anticoagulants,
These include diuretics, psychotropic drugs, hypnotics, and antibiotics.

Non-steroidal anti-inflammatory agents include salicylic acid, aspirin, acetaminophen, diclofenac sodium, ibuprofen, sulindac, naproxen, ketoprofen, flufenamic acid, ibhenac, fuenbufen, alclofenac, phenylbutazone, mehenamic acid, bendazac, piroxicam , Such as flurbiprofen.

Steroid anti-inflammatory drugs include hydrocortisone, prednisolone, fluocinolone acetonide, fludoxycortide, methylprednisolone, hydrocortisone acetate, triamcinolone acetonide, dexamethasone, betamethasone acetate, diflucortron valerate, clobetasol propionate, and fluocinonide. There is.

Vasodilators include diltiazem, verapamil, pentaerythritol tetranitrate, dipyridamole, and isosorbide dinitrate.

Antiarrhythmic agents include propanolol, pindolol,
Examples include quinidine, ajmaline, prazimarin, and alprenolol. Antihypertensive agents include clonidine. Anti-tumor agents include 5-fluorouracil, 1-
(2-tetrahydrofuryl) -5-fluorouracil,
Examples include mitomycin C. Local anesthetics include benzocaine, procaine, lidocaine and tetracaine. Hormonal agents include steroid hormones such as estrogen, estradiol, testosterone, and progesterone; peptide hormones such as insulin; prostaglandins. Antihistamines include cycloheptazine hydrochloride, diphenhydramine, phenbenzamine and the like. Anticoagulants include heparin, diuretics include thiazide, and psychotropic drugs include scopolamine and clofluperol. Hypnotics include phenobarbital and amobarbital; antibiotics include tetracycline and chloramphenicol. The blending amount of these drugs varies depending on the type of drug, the purpose of use of the patch, etc., but the drug is usually contained in the adhesive layer in a proportion of 0.1 to 30% by weight.

The base of the patch (adhesive) is not particularly limited as long as it has an adhesive force capable of fixing the patch on the skin surface at room temperature for a long time. For example, an acrylic, rubber-based, silicone resin-based adhesive or the like may be used, and an acrylic-based and rubber-based adhesive is usually used.

In the case of acrylic adhesives, because of their adhesive properties,
(Co) polymer of (meth) acrylic acid alkyl ester obtained from aliphatic alcohol having 4 to 18 carbon atoms and (meth) acrylic acid and / or the above (meth) acrylic acid alkyl ester and other functional monomer The copolymer of is preferably used.

Examples of the (meth) acrylic acid ester include butyl acrylate, isobutyl acrylate, hexyl acrylate,
Octyl acrylate, 2-ethylhexyl acrylate,
Isooctyl acrylate, decyl acrylate, isodecyl acrylate, lauryl acrylate, stearyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, -2 ethylhexyl methacrylate, isooctyl methacrylate, decyl methacrylate, Examples include isodecyl methacrylate, lauryl methacrylate, and stearyl methacrylate.

Examples of the functional monomer include a monomer having a hydroxyl group, a monomer having a carboxyl group, a monomer having an amide group, a monomer having an amino group, and the like. Examples of the monomer having a hydroxyl group include hydroxyalkyl (meth) acrylates such as 2-hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate. Examples of the monomer having a carboxyl group include acrylic acid, methacrylic acid, and other α-β unsaturated carboxylic acids; maleic acid monoalkyl esters such as butyl maleate; maleic acid; coumaric acid; crotonic acid. Maleic anhydride also gives the same (co) polymerization components as maleic acid. As the monomer having an amide group,
Alkyl (meth) acrylamides such as acrylamide, dimethyl acrylamide, diethyl acrylamide;
Examples include alkyl ether methylol (meth) acrylamides such as butoxymethyl acrylamide and ethoxymethyl acrylamide, diacetone acrylamide, and vinylpyrrolidone. Examples of the monomer having an amino group include dimethylamino acrylate.

Examples of copolymerizable monomers other than the above include vinyl acetate, styrene, α-methylstyrene, vinyl chloride, acrylotolyl, ethylene, propylene, butadiene and the like, and these may be copolymerized. It is preferable that the pressure-sensitive adhesive contains 50% by weight or more of (meth) acrylic acid alkyl ester as a (co) polymerization component.

As the rubber adhesive, natural rubber, synthetic isoprene rubber, polyisobutylene, polyvinyl ether, polyurethane, polybutadiene, styrene-butadiene copolymer, styrene-isoprene copolymer and the like are used.
Silicone rubber such as polyorganosiloxane is used as the silicone resin adhesive.

If necessary, various additives such as rosin-based resins, polyterpene resins, coumarone-indene resins, petroleum-based resins, terpene-phenol resins, etc. may be included in the above-mentioned adhesives; liquid polybutene, mineral oil, lanolin, liquid poly Plasticizers such as isoprene and liquid polyacrylate; fillers; antioxidants are added.

As a support for the patch, a support usually used for patches is used. Materials for such a support include cellulose acetate, ethyl cellulose, polyethylene terephthalate, vinyl acetate-vinyl chloride copolymer, nylon, ethylene-vinyl acetate copolymer, plasticized polyvinyl chloride, polyurethane, polyethylene, polyvinylidene chloride. , Aluminum, etc. These are, for example, a single layer sheet (film) or a laminate of two or more sheets (laminate).
Used as a body. Materials other than aluminum may be used as woven or non-woven fabrics.

A pressure-sensitive adhesive layer containing a drug and a surfactant is formed on the surface of the support to give a patch. To form the pressure-sensitive adhesive layer, various coating methods such as a solvent coating method, a hot melt coating method, and an electron beam curing emulsion coating method can be used. Among them, the solvent coating method is preferably used. To form the pressure-sensitive adhesive layer by the solvent coating method, for example, the pressure-sensitive adhesive is diluted with an appropriate solvent, and a drug, a surfactant, a fatty acid ester and, if necessary, a compounding agent are added and mixed uniformly. , Apply the obtained solution on the surface of the support and dry it. The solution may be coated on a release paper coated with a silicone resin or the like instead of being coated on the surface of the linear support, and may be brought into close contact with the support after drying. Such release paper is used to protect the surface of the adhesive layer of the patch until use. Even in coating methods other than the solvent coating method, it is recommended that a release paper be placed to protect this surface after forming the adhesive layer. The thickness of the pressure-sensitive adhesive layer varies depending on the purpose of use, but is usually 30 to 200 μm. If it is less than 30 μm, the required amount of drug cannot be contained and the adhesiveness is insufficient. When it exceeds 200 μm, the drug contained in the pressure-sensitive adhesive layer near the support does not sufficiently diffuse, and the drug release property decreases.

(Operation) When the patch of the present invention is applied to the surface of the skin, the contained drug is easily absorbed through the skin. Although the detailed mechanism is unknown, it is considered that the surfactant acts on the skin to denature the protein, increase the water content and soften it. Therefore, it is generally considered that the stratum corneum on the skin surface, which is difficult to penetrate the drug, is softened and the contained drug is easily absorbed through the skin. Furthermore, since the fatty acid ester is contained, the adhesive strength is improved, and the adhesive strength is not reduced due to the surfactant. Since the patch can be applied to the skin surface for a long time, the drug is effectively absorbed. The fatty acid ester increases the diffusion rate of the drug and the surfactant in the adhesive and, as a result, improves the initial absorption performance of the drug. Since the sufficiently diffused surfactant acts on the skin, the transdermal absorption rate of the drug also increases. In such a patch, a sufficient amount of the drug to obtain the required drug effect is easily absorbed, so that it is not necessary to include a large amount of the drug in the adhesive layer as in the conventional case. Moreover, it is possible to maintain the effective blood concentration for a long time. That is, the bioavailability of the drug is high. Such a percutaneous absorption promoting effect and a drug effect sustaining effect are much higher than those using conventional absorption promoting agents. Moreover, the surfactants and fatty acid esters used in the present invention are not irritating to the skin and are highly safe. It does not modify the contained drug. Excellent compatibility with adhesives. Since the compatibility between the drug and the adhesive does not change, the drug does not precipitate from the surface of the adhesive layer after preparation.

(Example) Hereinafter, the present invention will be described with reference to Examples.

Example 1 (A) Preparation of patch: 2-ethylhexyl acrylate 97
22% by weight of a copolymer consisting of 3% by weight and acrylic acid
An ethyl acetate solution containing it in a weight% ratio was prepared. To 100 parts by weight of this solution (solid content), 7.7 parts by weight of isosorbide dinitrate as a drug, 2.0 parts by weight of lauric acid diethanolamide as a surfactant and 5.0 parts by weight of isopropyl myristate as a fatty acid ester were added and thoroughly stirred. Apply this onto a polyamide film and apply 20
After drying for a minute, a patch having an adhesive layer thickness of 50 μm was obtained.

(B) Performance evaluation of patch: using the patch obtained in (A)
It was cut to a size of 50 cm ² and attached to the skin surface of the dehaired back of Japanese white rabbits. 0.5 hours later, 1 hour later,
After 2 hours, 4 hours, 6 hours, 10 hours and 24 hours, blood was collected from the auricular vein of rabbits and centrifuged to obtain plasma. This was extracted with hexane and subjected to Ni ⁶³ ECD gas chromatography to measure the drug concentration. The results are shown in Table 1.

Separately, the patch obtained in the item (A) was punched out to a diameter of 36 mm and stuck to the inside of the human upper arm. After 8 hours and 24 hours, the adhesiveness of the patch to the skin and the presence or absence of disorders such as redness and rash on the skin surface were examined. The results are shown in Table 2.
In Table 2, ◯ indicates that the patch is in good contact with the skin surface, Δ indicates that the patch is slightly peelable, and x indicates that it easily peels off.

Comparative Example 1 (A) Preparation of patch: The same as in Example 1 (A) except that the surfactant and fatty acid ester were not added.

(B) Performance evaluation of patch: Using the patch obtained in this Comparative Example (A), the same procedure as in Example 1 (B) was performed. The results are shown in Tables 1 and 2.

Comparative Example 2 (A) Preparation of patch: Same as Example 1 (A) except that fatty acid ester was not added.

(B) Performance evaluation of patch: Using the patch obtained in this Comparative Example (A), the same procedure as in Example 1 (B) was performed. The results are shown in Tables 1 and 2.

Comparative Example 3 (A) Preparation of patch: Same as Example 1 (A) except that no surfactant was added.

(B) Performance evaluation of patch: Using the patch obtained in this Comparative Example (A), the same procedure as in Example 1 (B) was performed. The results are shown in Tables 1 and 2.

From Tables 1 and 2, it is understood that the patch of the present invention has good drug absorbability through the skin and its adhesive force does not decrease with time. On the other hand, it is clear that when only the surfactant is added, the drug absorbability is quite good, but the adhesive strength decreases with time. When only the fatty acid ester is added, the adhesive strength is good and the initial absorbability of the drug is good, but it is observed that the drug absorbability decreases with time.

Example 2 (A) Preparation of patch: 2-ethylhexyl acrylate 60
An ethyl acetate solution containing 20% by weight of a copolymer composed of 40 parts by weight of vinyl acetate and 40 parts by weight of vinyl acetate was prepared. This solution 10
0.6 parts by weight of hydrocortisone acetate to 0 parts by weight (solid content),
1.5 parts by weight of polyoxyethylene (2) capric acid diethanolamide and 5 parts by weight of isopropyl palmitate were uniformly mixed. This was applied onto a polyethylene film and dried at 70 ° C. for 20 minutes to obtain a patch having an adhesive layer thickness of 50 μm.

(B) Performance evaluation of patch: Using the patch obtained in the section of this Example (A), a drug permeability test was conducted by an in vitro diffusion cell. The drug permeability (%) after 24 hours is shown in Table 3.
The test method is as follows.

In Vitro Diffusion Cell Method for Drug Permeability: Opening Diameter is 25
Prepare a Franz diffusion cell of cm. A physiological saline adjusted to pH 7.2 is put into the receptor part of the Franz diffusion cell, and the temperature of the receptor part is kept constant by circulating hot water of 37 ° C on the outer wall part. The test piece (circle having a diameter of 2 cm) of the patch obtained in (A) is attached to the epidermis (4 cm × 4 cm) of the abdominal region of the rat, which is subjected to hair removal, and the epidermis is attached to the cell. Fill the receptor liquid, being careful not to let air bubbles enter between the skin and the surface of the receptor liquid. After 24 hours, the receptor liquid is sampled, the drug concentration is measured by high performance liquid chromatography using a reversed phase column, and the drug permeability is calculated from the following formula.

Example 3 (A) Preparation of patch: 1.5 parts by weight of polyoxyethylene (5) caproic acid diethanolamide and 5 parts by weight of myristyl caprylate were used instead of polyoxyethylene (2) capric acid diethanolamide and isopropyl palmitate, respectively. Except that it was used, the procedure is the same as in Example 2 (A).

(B) Performance evaluation of patch: Using the patch obtained in this Example (A), the same procedure as in Example 2 (B) was carried out. The results are shown in Table 3.

Example 4 (A) Preparation of patch: Polyoxyethylene (2) capric acid diethanolamide and isopropyl palmitate were replaced with 1.5 parts by weight of dibutanolamide stearate and 5 parts by weight of hexyl laurate, respectively. The same as in Example 2 (A).

(B) Performance evaluation of patch: Using the patch obtained in this Example (A), the same procedure as in Example 2 (B) was carried out. The results are shown in Table 3.

Comparative Example 4 (A) Preparation of patch: The same as in Example 2 (A) except that the surfactant and fatty acid ester were not added.

(B) Performance evaluation of patch: The patch obtained in this Comparative Example (A) was used and tested in the same manner as in Example 2 (B). The results are shown in Table 3.

Comparative Example 5 (A) Preparation of patch: Example 2 except that 5 parts by weight of urea was used instead of polyoxyethylene (2) capric acid diethanolamide and isopropyl palmitate.
It is the same as the item (A).

(B) Performance evaluation of patch: Using the patch obtained in this Comparative Example (A), the same procedure as in Example 2 (B) was carried out. The results are shown in Table 3.

Comparative Example 6 (A) Preparation of patch: the same as in Example 2 (A) except that 5 parts by weight of diisopropyl adipate was used instead of polyoxyethylene (2) capric acid diethanolamide and isopropyl palmitate. is there.

(B) Performance evaluation of patch: Using the patch obtained in this Comparative Example (A), the same procedure as in Example 2 (B) was carried out. The results are shown in Table 3.

Comparative Example 7 (A) Preparation of patch: Same as Example 2 (A) except that 5 parts by weight of propylene glycol was used instead of polyoxyethylene (2) capric acid diethanolamide and isopropyl palmitate. .

(B) Performance evaluation of patch: Using the patch obtained in this Comparative Example (A), the same procedure as in Example 2 (B) was performed. The results are shown in Table 3.

It can be seen from Table 3 that the patch of the present invention is superior in drug permeability through the skin as compared with the patch using a conventional absorption enhancer.

(Effects of the Invention) According to the present invention, as described above, by incorporating a fatty acid dialkylolamide and / or a fatty acid dialkylolamide alkylene oxide adduct and a fatty acid ester in the adhesive layer, A patch with excellent skin absorbability and whose adhesiveness does not decrease over a long period of time can be obtained. Since the drug absorbability is excellent, it is not necessary to include a large amount of drug in the adhesive layer as in the conventional case in order to obtain a necessary pharmacological effect. Adhesiveness does not decrease over time, so effective blood levels of the drug can be maintained for long periods of time. Since the surfactants such as fatty acid dialkylol amide and fatty acid esters used are not irritating to the skin, rash does not occur even when applied for a long time. It does not alter the drug. Further, the drug does not precipitate due to such a compound. With such a patch, various drugs can be percutaneously absorbed. Therefore, it can be used for various medical purposes depending on the type of drug contained.

Claims (4)

[Claims] 1. A patch comprising an adhesive layer containing a drug, a surfactant and a fatty acid ester on the surface of a support, wherein the surfactant is a fatty acid dialkylolamide and / or a fatty acid dialkylolamide. A patch, wherein the fatty acid forming the surfactant and the fatty acid forming the fatty acid ester each have 6 to 18 carbon atoms. 2. The patch according to claim 1, wherein the added mole number of the alkylene oxide is 1 to 40. 3. The composition according to claim 1, wherein the surfactant is contained in the adhesive layer in a proportion of 0.1 to 20% by weight and the fatty acid ester is contained in a proportion of 0.5 to 50% by weight. Patch. 4. The patch according to claim 1, wherein the adhesive in the adhesive layer is an acrylic adhesive or a rubber adhesive.