CA1333769C - Adhesive dressing containing a pharmaceutically active ingredient - Google Patents
Adhesive dressing containing a pharmaceutically active ingredientInfo
- Publication number
- CA1333769C CA1333769C CA000576790A CA576790A CA1333769C CA 1333769 C CA1333769 C CA 1333769C CA 000576790 A CA000576790 A CA 000576790A CA 576790 A CA576790 A CA 576790A CA 1333769 C CA1333769 C CA 1333769C
- Authority
- CA
- Canada
- Prior art keywords
- adhesive layer
- adhesive
- mineral oil
- active ingredient
- pharmaceutically active
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004480 active ingredient Substances 0.000 title claims abstract description 27
- 239000000853 adhesive Substances 0.000 title claims description 46
- 230000001070 adhesive effect Effects 0.000 title claims description 46
- 239000012790 adhesive layer Substances 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 13
- 239000000806 elastomer Substances 0.000 claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 9
- 239000002480 mineral oil Substances 0.000 claims description 34
- 235000010446 mineral oil Nutrition 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 21
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 19
- 239000004615 ingredient Substances 0.000 claims description 17
- 229960002117 triamcinolone acetonide Drugs 0.000 claims description 15
- YNDXUCZADRHECN-JNQJZLCISA-N triamcinolone acetonide Chemical group C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1C[C@H]3OC(C)(C)O[C@@]3(C(=O)CO)[C@@]1(C)C[C@@H]2O YNDXUCZADRHECN-JNQJZLCISA-N 0.000 claims description 15
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 13
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 13
- 108010010803 Gelatin Proteins 0.000 claims description 11
- 229920000159 gelatin Polymers 0.000 claims description 11
- 239000008273 gelatin Substances 0.000 claims description 11
- 229940014259 gelatin Drugs 0.000 claims description 11
- 235000019322 gelatine Nutrition 0.000 claims description 11
- 235000011852 gelatine desserts Nutrition 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 239000001814 pectin Substances 0.000 claims description 10
- 235000010987 pectin Nutrition 0.000 claims description 10
- 229920001277 pectin Polymers 0.000 claims description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 9
- 229920005549 butyl rubber Polymers 0.000 claims description 8
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 6
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 6
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 6
- 229940105329 carboxymethylcellulose Drugs 0.000 claims description 6
- 229920002307 Dextran Polymers 0.000 claims description 5
- 229920002907 Guar gum Polymers 0.000 claims description 5
- 229920000569 Gum karaya Polymers 0.000 claims description 5
- 239000002260 anti-inflammatory agent Substances 0.000 claims description 5
- 239000000679 carrageenan Chemical class 0.000 claims description 5
- 235000010418 carrageenan Nutrition 0.000 claims description 5
- 229920001525 carrageenan Chemical class 0.000 claims description 5
- 229940113118 carrageenan Drugs 0.000 claims description 5
- 239000001767 crosslinked sodium carboxy methyl cellulose Substances 0.000 claims description 5
- 235000010947 crosslinked sodium carboxy methyl cellulose Nutrition 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 5
- 229920000578 graft copolymer Polymers 0.000 claims description 5
- 235000010417 guar gum Nutrition 0.000 claims description 5
- 239000000665 guar gum Substances 0.000 claims description 5
- 229960002154 guar gum Drugs 0.000 claims description 5
- 235000010494 karaya gum Nutrition 0.000 claims description 5
- 235000010493 xanthan gum Nutrition 0.000 claims description 5
- 239000000230 xanthan gum Substances 0.000 claims description 5
- 229920001285 xanthan gum Polymers 0.000 claims description 5
- 229940082509 xanthan gum Drugs 0.000 claims description 5
- UHVMMEOXYDMDKI-JKYCWFKZSA-L zinc;1-(5-cyanopyridin-2-yl)-3-[(1s,2s)-2-(6-fluoro-2-hydroxy-3-propanoylphenyl)cyclopropyl]urea;diacetate Chemical class [Zn+2].CC([O-])=O.CC([O-])=O.CCC(=O)C1=CC=C(F)C([C@H]2[C@H](C2)NC(=O)NC=2N=CC(=CC=2)C#N)=C1O UHVMMEOXYDMDKI-JKYCWFKZSA-L 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 239000002759 woven fabric Substances 0.000 claims description 4
- 229920000161 Locust bean gum Polymers 0.000 claims description 3
- 235000010443 alginic acid Nutrition 0.000 claims description 3
- 239000000783 alginic acid Substances 0.000 claims description 3
- 229920000615 alginic acid Polymers 0.000 claims description 3
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- 150000004781 alginic acids Chemical class 0.000 claims description 3
- 239000010408 film Substances 0.000 claims description 3
- 238000010348 incorporation Methods 0.000 claims description 3
- 235000010420 locust bean gum Nutrition 0.000 claims description 3
- 239000000711 locust bean gum Substances 0.000 claims description 3
- 229960000292 pectin Drugs 0.000 claims description 3
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 229940121363 anti-inflammatory agent Drugs 0.000 claims 4
- 238000010030 laminating Methods 0.000 claims 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 2
- 229920002472 Starch Polymers 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- 159000000000 sodium salts Chemical class 0.000 claims 2
- 239000008107 starch Substances 0.000 claims 2
- 235000019698 starch Nutrition 0.000 claims 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims 1
- -1 tackifiers Substances 0.000 description 12
- 229920001577 copolymer Polymers 0.000 description 9
- 239000003963 antioxidant agent Substances 0.000 description 8
- 235000006708 antioxidants Nutrition 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229920002633 Kraton (polymer) Polymers 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 230000003078 antioxidant effect Effects 0.000 description 6
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 6
- 239000004698 Polyethylene Substances 0.000 description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 5
- 239000011149 active material Substances 0.000 description 5
- 229960004311 betamethasone valerate Drugs 0.000 description 5
- 229960002311 dithranol Drugs 0.000 description 5
- VLTOSDJJTWPWLS-UHFFFAOYSA-N pent-2-ynal Chemical compound CCC#CC=O VLTOSDJJTWPWLS-UHFFFAOYSA-N 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 229960005294 triamcinolone Drugs 0.000 description 5
- GFNANZIMVAIWHM-OBYCQNJPSA-N triamcinolone Chemical compound O=C1C=C[C@]2(C)[C@@]3(F)[C@@H](O)C[C@](C)([C@@]([C@H](O)C4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 GFNANZIMVAIWHM-OBYCQNJPSA-N 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 4
- 229920002785 Croscarmellose sodium Polymers 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 239000013543 active substance Substances 0.000 description 3
- NUZWLKWWNNJHPT-UHFFFAOYSA-N anthralin Chemical compound C1C2=CC=CC(O)=C2C(=O)C2=C1C=CC=C2O NUZWLKWWNNJHPT-UHFFFAOYSA-N 0.000 description 3
- SNHRLVCMMWUAJD-SUYDQAKGSA-N betamethasone valerate Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1C[C@H](C)[C@@](C(=O)CO)(OC(=O)CCCC)[C@@]1(C)C[C@@H]2O SNHRLVCMMWUAJD-SUYDQAKGSA-N 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 2
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- QWOJMRHUQHTCJG-UHFFFAOYSA-N CC([CH2-])=O Chemical compound CC([CH2-])=O QWOJMRHUQHTCJG-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
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- BLFLLBZGZJTVJG-UHFFFAOYSA-N benzocaine Chemical compound CCOC(=O)C1=CC=C(N)C=C1 BLFLLBZGZJTVJG-UHFFFAOYSA-N 0.000 description 2
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 2
- 235000010410 calcium alginate Nutrition 0.000 description 2
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- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 description 2
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- CADWTSSKOVRVJC-UHFFFAOYSA-N benzyl(dimethyl)azanium;chloride Chemical compound [Cl-].C[NH+](C)CC1=CC=CC=C1 CADWTSSKOVRVJC-UHFFFAOYSA-N 0.000 description 1
- 239000003181 biological factor Substances 0.000 description 1
- MXJWRABVEGLYDG-UHFFFAOYSA-N bufexamac Chemical compound CCCCOC1=CC=C(CC(=O)NO)C=C1 MXJWRABVEGLYDG-UHFFFAOYSA-N 0.000 description 1
- 229960000962 bufexamac Drugs 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 229960000846 camphor Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229960003260 chlorhexidine Drugs 0.000 description 1
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 description 1
- 229960001231 choline Drugs 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920006147 copolyamide elastomer Polymers 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229960003913 econazole Drugs 0.000 description 1
- 229940088598 enzyme Drugs 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003527 fibrinolytic agent Substances 0.000 description 1
- 230000003480 fibrinolytic effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229960004675 fusidic acid Drugs 0.000 description 1
- IECPWNUMDGFDKC-MZJAQBGESA-N fusidic acid Chemical compound O[C@@H]([C@@H]12)C[C@H]3\C(=C(/CCC=C(C)C)C(O)=O)[C@@H](OC(C)=O)C[C@]3(C)[C@@]2(C)CC[C@@H]2[C@]1(C)CC[C@@H](O)[C@H]2C IECPWNUMDGFDKC-MZJAQBGESA-N 0.000 description 1
- 229960002383 halcinonide Drugs 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 229960000890 hydrocortisone Drugs 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 230000001530 keratinolytic effect Effects 0.000 description 1
- 239000003410 keratolytic agent Substances 0.000 description 1
- 229960004194 lidocaine Drugs 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229960005015 local anesthetics Drugs 0.000 description 1
- 231100000344 non-irritating Toxicity 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229960000988 nystatin Drugs 0.000 description 1
- VQOXZBDYSJBXMA-NQTDYLQESA-N nystatin A1 Chemical compound O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/CC/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 VQOXZBDYSJBXMA-NQTDYLQESA-N 0.000 description 1
- 239000004767 olefin fiber Substances 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical class OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 150000003904 phospholipids Chemical class 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940024999 proteolytic enzymes for treatment of wounds and ulcers Drugs 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 201000010153 skin papilloma Diseases 0.000 description 1
- 150000003385 sodium Chemical class 0.000 description 1
- 230000003637 steroidlike Effects 0.000 description 1
- 150000003431 steroids Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229950001669 tipredane Drugs 0.000 description 1
- 229960005356 urokinase Drugs 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- BOXSVZNGTQTENJ-UHFFFAOYSA-L zinc dibutyldithiocarbamate Chemical compound [Zn+2].CCCCN(C([S-])=S)CCCC.CCCCN(C([S-])=S)CCCC BOXSVZNGTQTENJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/70—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
-
- 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
- A61K9/7076—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising ingredients of undetermined constitution or reaction products thereof, e.g. rosin or other plant resins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/44—Medicaments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/58—Adhesives
- A61L15/585—Mixtures of macromolecular compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/41—Anti-inflammatory agents, e.g. NSAIDs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S602/00—Surgery: splint, brace, or bandage
- Y10S602/90—Method of making bandage structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1452—Polymer derived only from ethylenically unsaturated monomer
Abstract
A dressing comprising a flexible backing member and a pressure sensitive adhesive layer.
The adhesive layer comprises one or more poly-isobutylenes, elastomers, and one or more moistrue absorbing, moisture transmitting, water soluble and/or water swellable agents. A dispersion of the active ingredient in a medium compatible with the adhesive layer is laminated to the skin contacting surface.
The adhesive layer comprises one or more poly-isobutylenes, elastomers, and one or more moistrue absorbing, moisture transmitting, water soluble and/or water swellable agents. A dispersion of the active ingredient in a medium compatible with the adhesive layer is laminated to the skin contacting surface.
Description
ADHESIVE DRESSINGS CONTAINING A
PHA~'~CEUTICALLY ACTIVE INGREDIENT
This invention is directed to a pressure sensitive, adhesive dressing containing a pharma-ceutically active ingredient and to the method of preparing such dressing. The adhesive layer of the dressing is capable of releasing the active ingredient to the surface of the skin covered by the dressing over a period of time of from several hours to one or more days. The surface of the adhesive layer opposite the skin contacting surface is attached to a flexible backing member.
The adhesive layer comprises a homogeneous blend of one or more polyisobutylenes or mixture of one or more polyisobutylenes and an elastomer such as butyl rubber and/or styrene radial or block type copolymers and one or more moisture absorbing, moisture transmitting, water soluble or water swellable agents.
The adhesive may contain other optional ingredients such as mineral oil, tackifiers, antioxidants, etc.
The pharmaceutically active ingredient is incorporated into the adhesive layer so that it resides at the skin contacting surface and in the strata of the adhesive layer closest to the skin contacting surface. This is accomplished by forming t 333769 a suspension of the active ingredient in a material which is compatible with the composition of the adhesive layer. This suspension is then cast onto a sheet of silicone coated release paper which is then laminated to the skin contacting surface of the adhesive layer.
The pressure sensitive adhesive dressing of this invention consists of an adhesive layer formulated from materials suitable for use on human skin and a flexible backing layer. The adhesive layer must be capable of bonding to the skin for from several hours to several days.
Suitable pressure sensitive adhesive composi-tions for use as the skin contacting adhesive layerof the dressing of this invention are homogeneous blends of one or more polyisobutylenes or mixtures of one or more polyisobutylenes and an elastomer such as butyl rubber, medium or high molecular weight polyisobutylene and/or styrene radial or block type copolymers and one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents. The adhesive compo-sitions may contain other optional ingredients such as mineral oil, tackifiers, antioxidants, etc.
The polyisobutylene component of the pressure sensitive adhesive compositions function to provide adhesion to dry body surfaces, i.e., dry tack, and along with the flexible backing layer maintain the structural integrity of the dressing. Preferably, the polyisobutylenes employed are one or more low molecular weight polyisobutylenes having a viscosity average molecular weight of from about 8,700 to about _3_ SA38 11,700 (Staudinger). Such polyisobutylenes are commercially available under the trademark Vistanex from Exxon as grades LM - MS and LM - MH.
The polyisobutylene can be combined with one or more elastomers. These materials function to increase the elasticity, tear resistance, and cohesiveness of the adhesive compositions. Suitable elastomers include butyl rubber which is a copolymer of isobutylene with a minor amount of isoprene having a viscosity average molecular weight of from about 350,000 to about 450,000 (Florey), medium and high molecular weight polyisobutylene such as Vistanex MM L-100 having a viscosity average molecular weight of from about 81,000 to about 99,000 (Staudinger) and styrene radial or block copolymers. Particularly suitable styrene copolymers include styrene-butadiene-styrene (S-B-S) and styrene-isoprene-styrene (S-I-S) block type copolymers both of which are commercially available, for example, from Shell Chemical Co. under their tradename Kraton 1100, 1101, 1102, 1107, etc.
The moisture absorbing, moisture transmitting, water soluble or water swellable agents permit the adhesive compositions to adhere to moist body surfaces, i.e., wet tack. In addition, while not being limited in attempting to explain the mechanism by which the pharmaceutical ingredient is released from the dressing, it is believed that the absorption of moisture from the surface of the skin into the adhesive layer results in a dynamic change in the microenvironment at the adhesive layer-skin inter-face caused by hydration of these agents at the adhesive surface and gradually throughout the entire adhesive layers. This results in the continuous release of the topically active pharmaceutical agent from the adhesive layer. Suitable water * Trade-mark ~'~
1 s~376q ` 4 SA38 soluble agents for incorporation within the adhesive compositions are hydrocolloid gums including sodium carboxymethylcellulose, potassium carboxymethyl-cellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, xanthan gum, mixed sodium/calcium salts of alginic acid, carrageenan, etc., and mixtures thereof. Suitable water swellable agents include substantially water insoluble cross-linked sodium carboxymethylcellulose such as that commer-cially available under the trademarks AcDiSol orAqualon or that described in U.S. Patent 3,589,364, substantially water insoluble starch-acrylonitrile graft copolymer such as that in U.S. Patent 3,661,815 and that commercially available from Grain Processing Corp. under their Water-Lock trademark, and substantially water insoluble cross-linked dextran such as that commercially available under the trademark Sephadex.
Mineral oil can be included within the adhesive layer both as a component of the pressure sensitive adhesive formulation and, as explained below, as the preferred agent for incorporating or depositing the pharmaceutically active agent at the skin contacting surface and in the strata of the adhesive layer closest to the skin contacting surface.
Tackifiers can also be included within the adhesive layer. Suitable tackifiers include the pentaerythritol esters of rosin commercially available from Hercules under the trademark Pentalyn H, trimethylol propane ester of rosin commercially available from Hercules under the tradename Staybelite Ester 10, and the beta pinine resins such as Piccolyte S115 or the cyclopentadiene * Trade-mark ~c I ~`3 3 769 resins commercially available from Exxon such as *
Escorez 5300 or the Arakawa cyclic tackifiers namely the Arkon products. The adhesive layer can also contain small aounts, i.e., less than about 2% by weight of an antioxidant such as zinc dibutyldithiocarbamate (commercially available from R.T. Vanderbilt Co. under the tradename Butyl Zimate) or those available from Ciba Geigy such as Irganox 1010, tetrakis [methylene-(3,5-ditert-butyl-4-hydroxyhydrocinnamate] or Irganox 1076, octadecyl 3-[3,5-ditert-butyl-4'-hydroxy-phenyl]-propionate, etc.
The thickness of the adhesive layer can be varied. In general, the adhesive layer will be from about 20 to about 100 mils. Thicknesses greater than 100 mils are undesirable as being uncomfortable to wear and more prone to accidental removal.
Preferably, the composition of the adhesive layer prior to incorporation of the pharmaceutically active ingredient contains from about 15% to about 50% by weight of polyisobutylenes or blends of polyisobutylenes and one or more elastomers, from about 20% to about 70% by weight of one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, up to about 25% by weight of mineral oil, and up to about 20% by weight of tackifiers.
The surface of the adhesive layer that does not contact the skin has a flexible backing member affixed to it. Suitable backing members include polymeric films, woven and nonwoven fabric backings, and polymeric foams which themselves have a film or skin on the outer surface opposite the adhesive layer.
* Trade-mark l^ 3376q Suitable commercially available polymeric films include films made from polyethylene, polyurethane, polyether polyamide block copolymers, etc. Suitable commercially available nonwoven fabric backings include materials made from polyester fibers, polypropylene fibers, nylon fibers, composite olefin fibers, or cellulosic fibers. Suitable woven fabric backings include cotton, cotton blends, etc. Suitable polymeric foams include semi-open cell polyurethane foam as described by Chen in U.S. Patent 3,972,328. The skin contacting pressure sensitive adhesive layer can be affixed to the polyurethane foam by means of a secondary adhesive layer as taught by Pawelchak et al. in U.S. Patent 4,538,603.
When the flexible backing member is a polymeric film or fabric, it will vary in thickness from about 1 to about 5 mils. When the flexible backing member is a polymeric foam, it will vary in thickness from about 20 to about 100 mils.
The pharmaceutically active ingredient is incorporated into the adhesive layer so that it resides at the skin contacting surface and in the strata of the adhesive layer closest to the skin contacting surface. This is accomplished by forming a suspension of the pharmaceutically active ingredient in a material or medium which is compatible with the composition of the adhesive layer, i.e., able to be absorbed or intermixed or dissolved in the surface of the adhesive layer without impairing its adhesive characteristics. Of course, this material must be inert with respect to the active ingredient and capable of dispersing or dissolving it. This material must also be non-irritating, non-sensitizing, non-allergenic, and non-toxic. The resulting suspension is then cast onto a sheet of silicone coated release paper which is laminated to the skin contacting surface of the adhesive layer.
Various classes of pharmaceutically active ingredients can be incorporated into the dressing of this invention. Among the classes are topical anti-inflammatory agents and antipruritics including steroids such as triamcinolone acetonide, halcinonide, betamethasone valerate, hydrocortisone, tipredane, etc., and non-steroidal agents such as bufexamac, camphor, aspirin, etc., antipsoriatrics such as di-thranol, coal tar extracts, etc., keratolytics suchas salicylic acid, urea, etc., local anaesthetics such as lidocaine, benzocaine, etc., antibacterials such as benzalkonium chloride, fusidic acid, chlorhexidine, etc. antifungals such as nystatin, dithranol, ampho-tericin, econazole, etc., anti-viral agents, anti-acne agents such as benzoyl peroxide, vitamin A derivatives, etc., biological factors such as urokinase, tissue plaminogen activator, angiogenesis factor, etc., wart removers such as salicylic acid, lactic acid, etc., and enzymes such as fibrinolytic or proteolytic enzymes.
The preferred material for forming the suspension of the active ingredient is mineral oil and particularly mineral oil thickened by mixing with a polyethylene and liquid petrolatum base, i.e., Plastibase, the mineral oil and 1 7`3376q Plastibase being mixed on a 1:1 basis. The active ingredient is suspended in the mineral oil in an amount up to about 15% by weight with about 10% by weight being preferred. Other agents such as surfactants, suspending agents, skin penetration enhancers, thickeners, etc., can optionally be added in small ~uantities to the suspension.
The adhesive layer can also contain various optional ingredients. For example, the adhesive layer can contain up to about 10% by weight of the pharmaceutically active ingredient blended directly into the mixture of polyisobutylenes, elastomers, water soluble and/or water swellable agents. While such blended pharmaceutically active material is not released from the adhesive layer in an amount and at a rate to be useful by itself, it is released in a sufficient amount to augment the release of the pharma-ceutically active material contained at and adjacent the skin contacting surface of the adhesive layer.
Alternatively, the dressing can include a reservoir containing the pharmaceutically active material as described, for example, in the Zaffaroni patents and this reservoir can be employed to augment the release of the pharmaceutically active material contained at and adjacent the surface of the adhesive layer. In addition, the adhesive layer can contain up to about 10% by weight of one or more agents to enhance the i ~3376~
penetration of the pharmaceutically active agent into the skin of the user. Suitable penetration enhancers include oleic acid and other unsaturated acids, methyl-2-pyrrolidone, 2-pyrrolidone, lactic acid, phosphatidol choline and other phospholipids, dimethylisosorbide, dimethyl sulfoxide, Azone, etc.
The pharmaceutically active adhesive dressings of this invention can be prepared as follows. The process will vary somewhat depending upon the par-ticular polyisobutylenes and/or mixtures of polyiso-butylenes and elastomers employed in the adhesive layer. However, in general, these viscous materials along with the mineral oil and tackifiers are combined and blended in a sigma blade type mixer at room temperature or with heating. A blend of the powdery water soluble or swellable agents along with any other optional ingredients are added gradually and mixing is continued until a homogeneous mass is obtained as described in the Doyle et al. and Pawelchak et al.
patents discussed above. The adhesive mass is layered onto a sheet of silicone coated release paper, flattened to the desired thickness by either calendering or extruding, and a flexible backing member is laminated to the other surface of the adhesive layer.
A dispersion or suspension of the pharmaceuti-cally active ingredient in a medium compatible with the adhesive layer is formed. This dispersion is cast onto a sheet of silicone coated release paper as a thin uniform layer using a knife-over-roller, Meyer Rods, a transfer roll coater, etc.
1 }337hq The release paper is stripped off the adhesive layer and the adhesive layer is laminated to the silicone release paper coated with the dis-persion of the pharmaceutically active material.
The adhesive dressings of this invention can be sterilized by means of gamma radiation.
The following examples are illustrative of the invention.
1 33376~
Example 1 A pressure sensitive adhesive is prepared consisting of the following ingredients:
Ingredient Weight percent within the adhesive mass Polyisobutylene (Vistanex LM - MH) 8 Styrene-isoprene-styrene copolymer (Kraton D1107) 6 Butyl rubber (Grade 065-Exxon) 16.25 Tackifier (Pentalyn H) 12.75 Mineral oil 11.50 Antioxidant (Irganox 1010)0.50 Sodium carboxymethyl-cellulose 15.00 Pectin 15.00 Gelatin 15.00 The mineral oil (40.83 kg.), polyisobutylene (28.40 kg.), Kraton D1107 (21.30 kg.), Irganox 1010 (1.80 kg.) and butyl rubber (57.68 kg.) are combined in a sigma blade mixer with heating (about 115C) and ~ 333769 agitating for approximately 1 to 2.5 hours. The mixture is cooled to about 100C and after another 30 minutes of blending, sodium carboxymethylcellulose (53.25 kg.), pectin (53.25 kg.), gelatin (53.25 kg.), and Pentalyn H (45.26 kg.) are added. Mixing is continued at about 100C. for 30 minutes to give 355 kg. of a homogeneous adhesive mass.
The mass is allowed to cool and is flattened into an adhesive layer of the desired thickness of about 35 mils. A sheet of polyethylene is laminated to one surface and silicone coated release paper to the other.
Powdered triamcinolone acetonide ( 10.0 g.) is dispersed in a mixture of mineral oil and Plastibase 50W
at a 1:1 ratio (90.0 g). The dispersion is cast onto silicone coated release paper by means of a Meyer rod (#2) to give a uniform layer of dispersion of 7 to 8 mg./in.2.
The release paper is removed from the adhesive layer and this layer is laminated on the triamcinolone acetonide dispersion layer. In a few hours the dispersion is absorbed into the adhesive surface creating a smooth, glossy, tacky surface.
The resulting dressing contains at its surface 0.75 mg./in.2 of triamcinoline acetonide.
Example 2 Following the procedure of Example 1 but dispersing ( 2 g.) of triamcinolone acetonide in the thickened mineral oil, the resulting dressing contains 0.15 mg./in.2 of triamcinolone acetonide at its surface.
Example 3 A pressure sensitive adhesive is prepared consisting of the following ingredients:
IngredientWeight percent within the adhesive mass Polyisobutylene (Vistanex LM - MH) 9.55 Styrene-isoprene-styrene copolymer (Kraton D1107) 20.55 Tackifier (Pentalyn H) 12.80 Mineral oil 20.45 Antioxidant (Irganox 1010)1.55 Sodium carboxymethyl-cellulose 25.70 Cross-linked sodium carboxy-methylcellulose (Ac-Di-Sol)9.40 The mineral oil (22.5 kg.), polyisobutylene (10.5 kg.), Kraton D1107 (22.6 kg.), and Irganox 1010 (1.7 kg.) are combined in a sigma blade mixer with heating (about 115C) and agitating for approximately 1 to 2.5 hours. After cooling with additional blending, the sodium carboxymethylcellulose (28.3 kg.), Ac-Di-Sol (10.3 kg.), and Pentalyn H (14.1 kg.) are added. Mixing is continued at about 100C. for 30 minutes to give 110 kg. of a homogeneous adhesive mass.
* Trade-mark The adhesive mass is allowed to cool and is flattened into an adhesive layer of the desired thickness of about 35 mils. A sheet of polyethylene is laminated to one surface and the triamcinolone acetonide-mineral oil dispersion described in Example 1 is laminated to the other adhesive surface.
The resulting dressing contains 0.75 mg./in.2 of triamcinolone acetonide at the adhesive surface.
Example 4 Following the procedure of Example 3 but employing the triamcinolone acetonide-mineral oil dispersion of Example 2, a dressing is obtained containing 0.15 mg./in.2 of triamcinolone acetonide at the adhesive surface.
Exam~le 5 A pressure sensitive adhesive is prepared consisting of the following ingredients:
Ingredient Weight percent within the adhesive mass Polyisobutylene (Vistanex LM - MH) ^ 9.5 Polyisobutylene (Vistanex MM - L100) 9.5 Mineral oil 14.4 Sodium carboxymethyl-cellulose 22.2 Pectin 22.2 Gelatin 22.2 1 s3376~
The Vistanex MM-L100 (5.7 kg.) is added to the mixer and agitated for several minutes. The Vistanex LM-MH (5.7 kg.) is added and mixing continued for about 5 minutes. The gelatin is then added (13.3 kg.) and mixing continued for another 5 minutes.
This is followed by addition of the mineral oil (8.7 kg.) over ~ period of several minutes followed by the sodium carboxymethylcellulose (13.3 kg.) and pectin (13.3 kg.). Mixing is continued for another 20 minutes to give 60 kg. of a homogeneous adhesive mass.
The adhesive mass is flattened into an adhesive layer of the desired thickness of about 35 mils. A
sheet of polyethylene is laminated to one surface and the triamcinolone acetonide-mineral oil dispersion described in Example 1 is laminated to the other adhesive surface.
The resulting dressing contains 0.75 mg./in.2 of triamcinolone acetonide at the adhesive surface.
Example 6 Following the procedure of Example 5 but employing the triamcinolone acetonide-mineral oil dispersion of Example 2, a dressing is obtained containing 0.15 mg./in. of triamcinolone acetonide at the adhesive surface.
Example 7 An adhesive dressing is prepared as described by Pawelchak et al. in Example 1 of U.S. Patent 4,538,603.
The dressing consists of a layer of open cell polyurethane foam of about 0.045 inches thickness having a skin formed on one surface and an adhesive layer of about 0.005 inches on the other surface.
1 3~3769 This adhesive layer consists of:
Ingredient Percent by weight in the adhesive laYer Polyisobutylene (Vistanex LM - ~H) 18.0 Polyisobutylene (Vistanex MM L-100) 20.0 Tackifier (Piccolyte) 20.0 Antioxidant (BHT) 0.5 Mineral oil 8.5 Sodium carboxymethyl-cellulose 18.00 Gelatin 15.0 A skin contacting adhesive layer of 0.04 inches thickness is laminated to the adhesive layer described above. The skin contacting adhesive layer consists of:
Ingredient Percent by weight in the skin skin contacting adhesive layer Polyisobutylene (Vistanex LM - MH) 40 Pectin 20 Gelatin 20 Sodium carboxymethyl-cellulose 20 1 33376'3 The triamcinolone acetonide - mineral disper-sion described in Example 1 is laminated to the skin contacting adhesive layer to give a dressing contain-ing 0.75 mg./in. of triamcinolone acetonide at the adhesive surface.
Example 8 Following the procedure of Example 7 but employ-ing the triamcinolone acetonide-mineral oil dispersion described in Example 2, a dressing is obtained contain-ing 0.15 mg./in.2 of triamcinole acetonide at the adhesivesurface.
Exam~le 9 Following the procedure of Example 1 but re-placing the triamcinolone acetonide with betamethasone valerate at a concentration of 0.1 mg. per 5.5 mg. of mineral oil-Plastibase-betamethasone valerate mixture and 1.0 mg. per 5.5 mg. of mineral oil-Plastibase-beta-methasone valerate mixture to give dressings having from about 0.075 to 0.093 mg./in2. and from about 0.85 to 1.0 mg./in2. of betamethasone valerate at the adhesive surface.
Example 10 Following the procedure of Example 1 but replac-ing the triamcinolone acetonide with dithranol at a concentration of 0.1 mg. per 5.5 mg. of mineral oil-Plastibase-dithranol mixture and l.0 mg. per 5.5 mg.
of milleral oil-Plastibase-dithranol mixture to give drescings having 0.075 mg./in2. and 0.95 mg./in2. of dithranol at the adhesive surface.
Examples 11 - 17 Following the procedures of Examples 1 to 10, pre-ssure sensitive adhesive layers are formed of the follow-ing ingredients and a pharmaceutically active agent dis-persed in thickened mineral oil is laminated to the skin contacting adhesive surface at varying concentrations.
1 3337hq EXAMPLE
Ingredient Il 12 13 14 Polyisobutylene (Vistanex LM-MH) 10.2 8.0 20.0 35.0 Polyisobutylene (Vistanex MM-L100) - - 20.0 Butyl rubber - 16.25 Styrene-isoprene stryrene copolymer (Kraton D1107) 12.6 6.0 Tackifier 8.9512.75 20.0 Mineral Oil 25.111.50 19.5 9.5 Antioxidant 0.050.50 0.5 0.5 Sodium carboxymethylcellulose 31.020.0 Calcium carboxymethylcellulose - - - 15.0 Pectin Gelatin Guar gum - 15.0 Gum karaya - 10.0 Xanthan gum - - - 15.0 Mixed Sodium/Calcium alginate - - - 15.0 Carrageenan Water insoluble cross-linked sodium carboxymethylcellulose (Ac-Di-Sol) 12.1 Water insoluble starch-acryloni-trile graft copolymer (Water Lock A-100) Water insoluble cross-linked dextran - - - 10.0 Concentration of pharmaceutically active ingredient at skin contacting adhesive surface 0.65 2 0 55 2 0 45 2 0.25 2 mg/in mg/in mg/inmg/in EXAMPLE
Ingredient 15 16 17 Polyisobutylene (Vistanex LM-MH)10.0 10.0 30.0 Polyisobutylene (Vistanex MM-L100) Butyl rubber - 15.0 10.0 Styrene-isoprene stryrene copolymer (Kraton D1107) 15.0 8.0 Tackifier 5.0 7.95 Mineral Oil 9.5 20.0 15.0 Antioxidant 0.5 0.05 Sodium carboxymethylcellulose 20.0 15.0 Calcium carboxymethylcellulose Pectin - 12.0 Gelatin - 12.0 Guar gum Gum karaya Xanthan gum Mixed Sodium/Calcium alginate - - 15.0 Carrageenan 20.0 Water insoluble cross-linked sodium carboxymethylcellulose (Ac-Di-Sol) Water insoluble starch-acryloni-trile graft copolymer (Water Lock A-100) - - 10.0 Water insoluble cross-linked dextran Concentration of pharmaceutically active ingredient at skin contacting adhesive surface 7 2 0 50 2 0 30 2 mg/in mg/in mg/in
PHA~'~CEUTICALLY ACTIVE INGREDIENT
This invention is directed to a pressure sensitive, adhesive dressing containing a pharma-ceutically active ingredient and to the method of preparing such dressing. The adhesive layer of the dressing is capable of releasing the active ingredient to the surface of the skin covered by the dressing over a period of time of from several hours to one or more days. The surface of the adhesive layer opposite the skin contacting surface is attached to a flexible backing member.
The adhesive layer comprises a homogeneous blend of one or more polyisobutylenes or mixture of one or more polyisobutylenes and an elastomer such as butyl rubber and/or styrene radial or block type copolymers and one or more moisture absorbing, moisture transmitting, water soluble or water swellable agents.
The adhesive may contain other optional ingredients such as mineral oil, tackifiers, antioxidants, etc.
The pharmaceutically active ingredient is incorporated into the adhesive layer so that it resides at the skin contacting surface and in the strata of the adhesive layer closest to the skin contacting surface. This is accomplished by forming t 333769 a suspension of the active ingredient in a material which is compatible with the composition of the adhesive layer. This suspension is then cast onto a sheet of silicone coated release paper which is then laminated to the skin contacting surface of the adhesive layer.
The pressure sensitive adhesive dressing of this invention consists of an adhesive layer formulated from materials suitable for use on human skin and a flexible backing layer. The adhesive layer must be capable of bonding to the skin for from several hours to several days.
Suitable pressure sensitive adhesive composi-tions for use as the skin contacting adhesive layerof the dressing of this invention are homogeneous blends of one or more polyisobutylenes or mixtures of one or more polyisobutylenes and an elastomer such as butyl rubber, medium or high molecular weight polyisobutylene and/or styrene radial or block type copolymers and one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents. The adhesive compo-sitions may contain other optional ingredients such as mineral oil, tackifiers, antioxidants, etc.
The polyisobutylene component of the pressure sensitive adhesive compositions function to provide adhesion to dry body surfaces, i.e., dry tack, and along with the flexible backing layer maintain the structural integrity of the dressing. Preferably, the polyisobutylenes employed are one or more low molecular weight polyisobutylenes having a viscosity average molecular weight of from about 8,700 to about _3_ SA38 11,700 (Staudinger). Such polyisobutylenes are commercially available under the trademark Vistanex from Exxon as grades LM - MS and LM - MH.
The polyisobutylene can be combined with one or more elastomers. These materials function to increase the elasticity, tear resistance, and cohesiveness of the adhesive compositions. Suitable elastomers include butyl rubber which is a copolymer of isobutylene with a minor amount of isoprene having a viscosity average molecular weight of from about 350,000 to about 450,000 (Florey), medium and high molecular weight polyisobutylene such as Vistanex MM L-100 having a viscosity average molecular weight of from about 81,000 to about 99,000 (Staudinger) and styrene radial or block copolymers. Particularly suitable styrene copolymers include styrene-butadiene-styrene (S-B-S) and styrene-isoprene-styrene (S-I-S) block type copolymers both of which are commercially available, for example, from Shell Chemical Co. under their tradename Kraton 1100, 1101, 1102, 1107, etc.
The moisture absorbing, moisture transmitting, water soluble or water swellable agents permit the adhesive compositions to adhere to moist body surfaces, i.e., wet tack. In addition, while not being limited in attempting to explain the mechanism by which the pharmaceutical ingredient is released from the dressing, it is believed that the absorption of moisture from the surface of the skin into the adhesive layer results in a dynamic change in the microenvironment at the adhesive layer-skin inter-face caused by hydration of these agents at the adhesive surface and gradually throughout the entire adhesive layers. This results in the continuous release of the topically active pharmaceutical agent from the adhesive layer. Suitable water * Trade-mark ~'~
1 s~376q ` 4 SA38 soluble agents for incorporation within the adhesive compositions are hydrocolloid gums including sodium carboxymethylcellulose, potassium carboxymethyl-cellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, xanthan gum, mixed sodium/calcium salts of alginic acid, carrageenan, etc., and mixtures thereof. Suitable water swellable agents include substantially water insoluble cross-linked sodium carboxymethylcellulose such as that commer-cially available under the trademarks AcDiSol orAqualon or that described in U.S. Patent 3,589,364, substantially water insoluble starch-acrylonitrile graft copolymer such as that in U.S. Patent 3,661,815 and that commercially available from Grain Processing Corp. under their Water-Lock trademark, and substantially water insoluble cross-linked dextran such as that commercially available under the trademark Sephadex.
Mineral oil can be included within the adhesive layer both as a component of the pressure sensitive adhesive formulation and, as explained below, as the preferred agent for incorporating or depositing the pharmaceutically active agent at the skin contacting surface and in the strata of the adhesive layer closest to the skin contacting surface.
Tackifiers can also be included within the adhesive layer. Suitable tackifiers include the pentaerythritol esters of rosin commercially available from Hercules under the trademark Pentalyn H, trimethylol propane ester of rosin commercially available from Hercules under the tradename Staybelite Ester 10, and the beta pinine resins such as Piccolyte S115 or the cyclopentadiene * Trade-mark ~c I ~`3 3 769 resins commercially available from Exxon such as *
Escorez 5300 or the Arakawa cyclic tackifiers namely the Arkon products. The adhesive layer can also contain small aounts, i.e., less than about 2% by weight of an antioxidant such as zinc dibutyldithiocarbamate (commercially available from R.T. Vanderbilt Co. under the tradename Butyl Zimate) or those available from Ciba Geigy such as Irganox 1010, tetrakis [methylene-(3,5-ditert-butyl-4-hydroxyhydrocinnamate] or Irganox 1076, octadecyl 3-[3,5-ditert-butyl-4'-hydroxy-phenyl]-propionate, etc.
The thickness of the adhesive layer can be varied. In general, the adhesive layer will be from about 20 to about 100 mils. Thicknesses greater than 100 mils are undesirable as being uncomfortable to wear and more prone to accidental removal.
Preferably, the composition of the adhesive layer prior to incorporation of the pharmaceutically active ingredient contains from about 15% to about 50% by weight of polyisobutylenes or blends of polyisobutylenes and one or more elastomers, from about 20% to about 70% by weight of one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, up to about 25% by weight of mineral oil, and up to about 20% by weight of tackifiers.
The surface of the adhesive layer that does not contact the skin has a flexible backing member affixed to it. Suitable backing members include polymeric films, woven and nonwoven fabric backings, and polymeric foams which themselves have a film or skin on the outer surface opposite the adhesive layer.
* Trade-mark l^ 3376q Suitable commercially available polymeric films include films made from polyethylene, polyurethane, polyether polyamide block copolymers, etc. Suitable commercially available nonwoven fabric backings include materials made from polyester fibers, polypropylene fibers, nylon fibers, composite olefin fibers, or cellulosic fibers. Suitable woven fabric backings include cotton, cotton blends, etc. Suitable polymeric foams include semi-open cell polyurethane foam as described by Chen in U.S. Patent 3,972,328. The skin contacting pressure sensitive adhesive layer can be affixed to the polyurethane foam by means of a secondary adhesive layer as taught by Pawelchak et al. in U.S. Patent 4,538,603.
When the flexible backing member is a polymeric film or fabric, it will vary in thickness from about 1 to about 5 mils. When the flexible backing member is a polymeric foam, it will vary in thickness from about 20 to about 100 mils.
The pharmaceutically active ingredient is incorporated into the adhesive layer so that it resides at the skin contacting surface and in the strata of the adhesive layer closest to the skin contacting surface. This is accomplished by forming a suspension of the pharmaceutically active ingredient in a material or medium which is compatible with the composition of the adhesive layer, i.e., able to be absorbed or intermixed or dissolved in the surface of the adhesive layer without impairing its adhesive characteristics. Of course, this material must be inert with respect to the active ingredient and capable of dispersing or dissolving it. This material must also be non-irritating, non-sensitizing, non-allergenic, and non-toxic. The resulting suspension is then cast onto a sheet of silicone coated release paper which is laminated to the skin contacting surface of the adhesive layer.
Various classes of pharmaceutically active ingredients can be incorporated into the dressing of this invention. Among the classes are topical anti-inflammatory agents and antipruritics including steroids such as triamcinolone acetonide, halcinonide, betamethasone valerate, hydrocortisone, tipredane, etc., and non-steroidal agents such as bufexamac, camphor, aspirin, etc., antipsoriatrics such as di-thranol, coal tar extracts, etc., keratolytics suchas salicylic acid, urea, etc., local anaesthetics such as lidocaine, benzocaine, etc., antibacterials such as benzalkonium chloride, fusidic acid, chlorhexidine, etc. antifungals such as nystatin, dithranol, ampho-tericin, econazole, etc., anti-viral agents, anti-acne agents such as benzoyl peroxide, vitamin A derivatives, etc., biological factors such as urokinase, tissue plaminogen activator, angiogenesis factor, etc., wart removers such as salicylic acid, lactic acid, etc., and enzymes such as fibrinolytic or proteolytic enzymes.
The preferred material for forming the suspension of the active ingredient is mineral oil and particularly mineral oil thickened by mixing with a polyethylene and liquid petrolatum base, i.e., Plastibase, the mineral oil and 1 7`3376q Plastibase being mixed on a 1:1 basis. The active ingredient is suspended in the mineral oil in an amount up to about 15% by weight with about 10% by weight being preferred. Other agents such as surfactants, suspending agents, skin penetration enhancers, thickeners, etc., can optionally be added in small ~uantities to the suspension.
The adhesive layer can also contain various optional ingredients. For example, the adhesive layer can contain up to about 10% by weight of the pharmaceutically active ingredient blended directly into the mixture of polyisobutylenes, elastomers, water soluble and/or water swellable agents. While such blended pharmaceutically active material is not released from the adhesive layer in an amount and at a rate to be useful by itself, it is released in a sufficient amount to augment the release of the pharma-ceutically active material contained at and adjacent the skin contacting surface of the adhesive layer.
Alternatively, the dressing can include a reservoir containing the pharmaceutically active material as described, for example, in the Zaffaroni patents and this reservoir can be employed to augment the release of the pharmaceutically active material contained at and adjacent the surface of the adhesive layer. In addition, the adhesive layer can contain up to about 10% by weight of one or more agents to enhance the i ~3376~
penetration of the pharmaceutically active agent into the skin of the user. Suitable penetration enhancers include oleic acid and other unsaturated acids, methyl-2-pyrrolidone, 2-pyrrolidone, lactic acid, phosphatidol choline and other phospholipids, dimethylisosorbide, dimethyl sulfoxide, Azone, etc.
The pharmaceutically active adhesive dressings of this invention can be prepared as follows. The process will vary somewhat depending upon the par-ticular polyisobutylenes and/or mixtures of polyiso-butylenes and elastomers employed in the adhesive layer. However, in general, these viscous materials along with the mineral oil and tackifiers are combined and blended in a sigma blade type mixer at room temperature or with heating. A blend of the powdery water soluble or swellable agents along with any other optional ingredients are added gradually and mixing is continued until a homogeneous mass is obtained as described in the Doyle et al. and Pawelchak et al.
patents discussed above. The adhesive mass is layered onto a sheet of silicone coated release paper, flattened to the desired thickness by either calendering or extruding, and a flexible backing member is laminated to the other surface of the adhesive layer.
A dispersion or suspension of the pharmaceuti-cally active ingredient in a medium compatible with the adhesive layer is formed. This dispersion is cast onto a sheet of silicone coated release paper as a thin uniform layer using a knife-over-roller, Meyer Rods, a transfer roll coater, etc.
1 }337hq The release paper is stripped off the adhesive layer and the adhesive layer is laminated to the silicone release paper coated with the dis-persion of the pharmaceutically active material.
The adhesive dressings of this invention can be sterilized by means of gamma radiation.
The following examples are illustrative of the invention.
1 33376~
Example 1 A pressure sensitive adhesive is prepared consisting of the following ingredients:
Ingredient Weight percent within the adhesive mass Polyisobutylene (Vistanex LM - MH) 8 Styrene-isoprene-styrene copolymer (Kraton D1107) 6 Butyl rubber (Grade 065-Exxon) 16.25 Tackifier (Pentalyn H) 12.75 Mineral oil 11.50 Antioxidant (Irganox 1010)0.50 Sodium carboxymethyl-cellulose 15.00 Pectin 15.00 Gelatin 15.00 The mineral oil (40.83 kg.), polyisobutylene (28.40 kg.), Kraton D1107 (21.30 kg.), Irganox 1010 (1.80 kg.) and butyl rubber (57.68 kg.) are combined in a sigma blade mixer with heating (about 115C) and ~ 333769 agitating for approximately 1 to 2.5 hours. The mixture is cooled to about 100C and after another 30 minutes of blending, sodium carboxymethylcellulose (53.25 kg.), pectin (53.25 kg.), gelatin (53.25 kg.), and Pentalyn H (45.26 kg.) are added. Mixing is continued at about 100C. for 30 minutes to give 355 kg. of a homogeneous adhesive mass.
The mass is allowed to cool and is flattened into an adhesive layer of the desired thickness of about 35 mils. A sheet of polyethylene is laminated to one surface and silicone coated release paper to the other.
Powdered triamcinolone acetonide ( 10.0 g.) is dispersed in a mixture of mineral oil and Plastibase 50W
at a 1:1 ratio (90.0 g). The dispersion is cast onto silicone coated release paper by means of a Meyer rod (#2) to give a uniform layer of dispersion of 7 to 8 mg./in.2.
The release paper is removed from the adhesive layer and this layer is laminated on the triamcinolone acetonide dispersion layer. In a few hours the dispersion is absorbed into the adhesive surface creating a smooth, glossy, tacky surface.
The resulting dressing contains at its surface 0.75 mg./in.2 of triamcinoline acetonide.
Example 2 Following the procedure of Example 1 but dispersing ( 2 g.) of triamcinolone acetonide in the thickened mineral oil, the resulting dressing contains 0.15 mg./in.2 of triamcinolone acetonide at its surface.
Example 3 A pressure sensitive adhesive is prepared consisting of the following ingredients:
IngredientWeight percent within the adhesive mass Polyisobutylene (Vistanex LM - MH) 9.55 Styrene-isoprene-styrene copolymer (Kraton D1107) 20.55 Tackifier (Pentalyn H) 12.80 Mineral oil 20.45 Antioxidant (Irganox 1010)1.55 Sodium carboxymethyl-cellulose 25.70 Cross-linked sodium carboxy-methylcellulose (Ac-Di-Sol)9.40 The mineral oil (22.5 kg.), polyisobutylene (10.5 kg.), Kraton D1107 (22.6 kg.), and Irganox 1010 (1.7 kg.) are combined in a sigma blade mixer with heating (about 115C) and agitating for approximately 1 to 2.5 hours. After cooling with additional blending, the sodium carboxymethylcellulose (28.3 kg.), Ac-Di-Sol (10.3 kg.), and Pentalyn H (14.1 kg.) are added. Mixing is continued at about 100C. for 30 minutes to give 110 kg. of a homogeneous adhesive mass.
* Trade-mark The adhesive mass is allowed to cool and is flattened into an adhesive layer of the desired thickness of about 35 mils. A sheet of polyethylene is laminated to one surface and the triamcinolone acetonide-mineral oil dispersion described in Example 1 is laminated to the other adhesive surface.
The resulting dressing contains 0.75 mg./in.2 of triamcinolone acetonide at the adhesive surface.
Example 4 Following the procedure of Example 3 but employing the triamcinolone acetonide-mineral oil dispersion of Example 2, a dressing is obtained containing 0.15 mg./in.2 of triamcinolone acetonide at the adhesive surface.
Exam~le 5 A pressure sensitive adhesive is prepared consisting of the following ingredients:
Ingredient Weight percent within the adhesive mass Polyisobutylene (Vistanex LM - MH) ^ 9.5 Polyisobutylene (Vistanex MM - L100) 9.5 Mineral oil 14.4 Sodium carboxymethyl-cellulose 22.2 Pectin 22.2 Gelatin 22.2 1 s3376~
The Vistanex MM-L100 (5.7 kg.) is added to the mixer and agitated for several minutes. The Vistanex LM-MH (5.7 kg.) is added and mixing continued for about 5 minutes. The gelatin is then added (13.3 kg.) and mixing continued for another 5 minutes.
This is followed by addition of the mineral oil (8.7 kg.) over ~ period of several minutes followed by the sodium carboxymethylcellulose (13.3 kg.) and pectin (13.3 kg.). Mixing is continued for another 20 minutes to give 60 kg. of a homogeneous adhesive mass.
The adhesive mass is flattened into an adhesive layer of the desired thickness of about 35 mils. A
sheet of polyethylene is laminated to one surface and the triamcinolone acetonide-mineral oil dispersion described in Example 1 is laminated to the other adhesive surface.
The resulting dressing contains 0.75 mg./in.2 of triamcinolone acetonide at the adhesive surface.
Example 6 Following the procedure of Example 5 but employing the triamcinolone acetonide-mineral oil dispersion of Example 2, a dressing is obtained containing 0.15 mg./in. of triamcinolone acetonide at the adhesive surface.
Example 7 An adhesive dressing is prepared as described by Pawelchak et al. in Example 1 of U.S. Patent 4,538,603.
The dressing consists of a layer of open cell polyurethane foam of about 0.045 inches thickness having a skin formed on one surface and an adhesive layer of about 0.005 inches on the other surface.
1 3~3769 This adhesive layer consists of:
Ingredient Percent by weight in the adhesive laYer Polyisobutylene (Vistanex LM - ~H) 18.0 Polyisobutylene (Vistanex MM L-100) 20.0 Tackifier (Piccolyte) 20.0 Antioxidant (BHT) 0.5 Mineral oil 8.5 Sodium carboxymethyl-cellulose 18.00 Gelatin 15.0 A skin contacting adhesive layer of 0.04 inches thickness is laminated to the adhesive layer described above. The skin contacting adhesive layer consists of:
Ingredient Percent by weight in the skin skin contacting adhesive layer Polyisobutylene (Vistanex LM - MH) 40 Pectin 20 Gelatin 20 Sodium carboxymethyl-cellulose 20 1 33376'3 The triamcinolone acetonide - mineral disper-sion described in Example 1 is laminated to the skin contacting adhesive layer to give a dressing contain-ing 0.75 mg./in. of triamcinolone acetonide at the adhesive surface.
Example 8 Following the procedure of Example 7 but employ-ing the triamcinolone acetonide-mineral oil dispersion described in Example 2, a dressing is obtained contain-ing 0.15 mg./in.2 of triamcinole acetonide at the adhesivesurface.
Exam~le 9 Following the procedure of Example 1 but re-placing the triamcinolone acetonide with betamethasone valerate at a concentration of 0.1 mg. per 5.5 mg. of mineral oil-Plastibase-betamethasone valerate mixture and 1.0 mg. per 5.5 mg. of mineral oil-Plastibase-beta-methasone valerate mixture to give dressings having from about 0.075 to 0.093 mg./in2. and from about 0.85 to 1.0 mg./in2. of betamethasone valerate at the adhesive surface.
Example 10 Following the procedure of Example 1 but replac-ing the triamcinolone acetonide with dithranol at a concentration of 0.1 mg. per 5.5 mg. of mineral oil-Plastibase-dithranol mixture and l.0 mg. per 5.5 mg.
of milleral oil-Plastibase-dithranol mixture to give drescings having 0.075 mg./in2. and 0.95 mg./in2. of dithranol at the adhesive surface.
Examples 11 - 17 Following the procedures of Examples 1 to 10, pre-ssure sensitive adhesive layers are formed of the follow-ing ingredients and a pharmaceutically active agent dis-persed in thickened mineral oil is laminated to the skin contacting adhesive surface at varying concentrations.
1 3337hq EXAMPLE
Ingredient Il 12 13 14 Polyisobutylene (Vistanex LM-MH) 10.2 8.0 20.0 35.0 Polyisobutylene (Vistanex MM-L100) - - 20.0 Butyl rubber - 16.25 Styrene-isoprene stryrene copolymer (Kraton D1107) 12.6 6.0 Tackifier 8.9512.75 20.0 Mineral Oil 25.111.50 19.5 9.5 Antioxidant 0.050.50 0.5 0.5 Sodium carboxymethylcellulose 31.020.0 Calcium carboxymethylcellulose - - - 15.0 Pectin Gelatin Guar gum - 15.0 Gum karaya - 10.0 Xanthan gum - - - 15.0 Mixed Sodium/Calcium alginate - - - 15.0 Carrageenan Water insoluble cross-linked sodium carboxymethylcellulose (Ac-Di-Sol) 12.1 Water insoluble starch-acryloni-trile graft copolymer (Water Lock A-100) Water insoluble cross-linked dextran - - - 10.0 Concentration of pharmaceutically active ingredient at skin contacting adhesive surface 0.65 2 0 55 2 0 45 2 0.25 2 mg/in mg/in mg/inmg/in EXAMPLE
Ingredient 15 16 17 Polyisobutylene (Vistanex LM-MH)10.0 10.0 30.0 Polyisobutylene (Vistanex MM-L100) Butyl rubber - 15.0 10.0 Styrene-isoprene stryrene copolymer (Kraton D1107) 15.0 8.0 Tackifier 5.0 7.95 Mineral Oil 9.5 20.0 15.0 Antioxidant 0.5 0.05 Sodium carboxymethylcellulose 20.0 15.0 Calcium carboxymethylcellulose Pectin - 12.0 Gelatin - 12.0 Guar gum Gum karaya Xanthan gum Mixed Sodium/Calcium alginate - - 15.0 Carrageenan 20.0 Water insoluble cross-linked sodium carboxymethylcellulose (Ac-Di-Sol) Water insoluble starch-acryloni-trile graft copolymer (Water Lock A-100) - - 10.0 Water insoluble cross-linked dextran Concentration of pharmaceutically active ingredient at skin contacting adhesive surface 7 2 0 50 2 0 30 2 mg/in mg/in mg/in
Claims (12)
1. A method of preparing an adhesive dressing containing a pharmaceutically active ingredient compris-ing:
a) forming a pressure sensitive adhesive mass comprising:
i) one or more low molecular weight poly-isobutylenes, and ii) one or more moisture absorbing, mois-ture transmitting, water soluble and/or water swellable agents;
b) blending said pressure sensitive adhesive mass from step a) until homogeneous;
c) layering said blended adhesive mass from step b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin con-tacting surface and an adjacent strata;
d) laminating a flexible backing member to the exposed surface of said adhesive layer from step c);
e) dispersing a pharmaceutically active ingred-ient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesion layer;
f) coating or casting said dispersion from step e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step d) and lam-inating said coated or cast-on second release paper from step f) to said adhesive layer so that said dispersion of pharmaceutically ac-tive ingredient contacts the now exposed sur-face of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.
a) forming a pressure sensitive adhesive mass comprising:
i) one or more low molecular weight poly-isobutylenes, and ii) one or more moisture absorbing, mois-ture transmitting, water soluble and/or water swellable agents;
b) blending said pressure sensitive adhesive mass from step a) until homogeneous;
c) layering said blended adhesive mass from step b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin con-tacting surface and an adjacent strata;
d) laminating a flexible backing member to the exposed surface of said adhesive layer from step c);
e) dispersing a pharmaceutically active ingred-ient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesion layer;
f) coating or casting said dispersion from step e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step d) and lam-inating said coated or cast-on second release paper from step f) to said adhesive layer so that said dispersion of pharmaceutically ac-tive ingredient contacts the now exposed sur-face of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.
2. The process of claim 1 wherein said pressure sensitive adhesive means in step a) comprises from about 15% to about 50% by weight of one or more low molecular weight polyisobutylenes, from about 20% to about 70% by weight of one or more moisture absorbing, moisture trans-mitting, water soluble and/or water swellable agents, up to about 25% by weight of mineral oil, and up to about 20% by weight of tackifiers.
3. The process of claim 2 wherein said moisture absorbing, moisture transmitting, water soluble agents are selected from the group consisting of sodium carboxy-methylcellulose, calcium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, xanthan gum, mixed sodium/calcium salts of alginic acid, and carrageenan and said moisture absorbing, moisture trans-mitting water swellable agents are selected from the group consisting of a water insoluble cross-linked sod-ium carboxymethylcellulose, water insoluble starch ac-rylonitrile graft copolymers, and water insoluble cross-linked dextran.
4. A method of preparing an adhesive dressing containing a pharmaceutically active ingredient compris-ing:
a) forming a pressure sensitive adhesive mass comprising:
i) one or more low molecular weight poly-isobutylenes and one or more elasto-mers, and ii) one or more moisture absorbing, mois-ture transmitting, water soluble and/or water swellable agents;
b) blending said pressure sensitive adhesive mass from step a) until homogeneous;
c) layering said blended adhesive mass from step b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin contacting adhesive surface and an adjacent strata;
d) laminating a flexible backing member to the exposed surface of said adhesive layer from step c);
e) dispersing a pharmaceutically active ingred-ient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesive layer;
f) coating or casting said dispersion from step e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step d) and lam-inating said coated or cast-on second release paper from step f) to said adhesive layer so that said dispersion of pharmaceutically ac-tive ingredient contacts the now exposed sur-face of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.
a) forming a pressure sensitive adhesive mass comprising:
i) one or more low molecular weight poly-isobutylenes and one or more elasto-mers, and ii) one or more moisture absorbing, mois-ture transmitting, water soluble and/or water swellable agents;
b) blending said pressure sensitive adhesive mass from step a) until homogeneous;
c) layering said blended adhesive mass from step b) onto a first release coated surface and flattening said mass to form an adhesive layer of desired thickness having a skin contacting adhesive surface and an adjacent strata;
d) laminating a flexible backing member to the exposed surface of said adhesive layer from step c);
e) dispersing a pharmaceutically active ingred-ient into a mineral oil or thickened mineral oil medium which itself is not an adhesive but is compatible with the composition of said skin contacting adhesive layer;
f) coating or casting said dispersion from step e) as a uniform layer onto a second release paper; and g) removing said first release coated surface from said adhesive layer in step d) and lam-inating said coated or cast-on second release paper from step f) to said adhesive layer so that said dispersion of pharmaceutically ac-tive ingredient contacts the now exposed sur-face of said adhesive layer and is absorbed therein to give an adhesive dressing wherein said pharmaceutically active ingredient is present at both said skin contacting surface and said adjacent strata of said adhesive layer.
5. The process of claim 4 wherein said pharma-ceutically active ingredient is a topically active anti-inflammatory agent.
6. The process of claim 5 wherein said anti-inflammatory agent is triamcinolone acetonide and said dispersing medium is thickened mineral oil.
7. The process of claim 5 wherein said skin con-tacting adhesive layer prior to incorporation of the pharmaceutically active ingredient comprises from about 15% to about 50% by weight of blends of one or more low molecular weight polyisobutylenes and one or more elas-tomers, from about 30% to about 70% by weight of one or more moisture absorbing, moisture transmitting, water soluble and/or water swellable agents, up to about 25%
by weight of mineral oil, and up to about 20% by weight of tackifiers.
by weight of mineral oil, and up to about 20% by weight of tackifiers.
8. The process of claim 7 wherein said elastomer is selected from the group consisting of butyl rubber, medium and high molecular weight polyisobutylenes, and styrene radial or block copolymers, and said moisture absorbing, moisture transmitting, water soluble agents are selected from the group consisting of sodium carboxy-methylcellulose, calcium carboxymethylcellulose, pectin, gelatin, guar gum, locust bean gum, gum karaya, xanthan gum, mixed sodium/calcium salts of alginic acid, and carrageenan and said moisture absorbing, moisture trans-mitting water swellable agents are selected from the group consisting of a water insoluble cross-linked so-dium carboxymethylcellulose, water insoluble starch acrylonitrile graft copolymers, and water insoluble cross-linked dextran.
9. The process of claim 8 wherein said flexible backing member is selected from the group consisting of polymeric films, woven and nonwoven fabrics, and polymeric foams.
10. The process of claim 1 wherein said pharmaceu-tically active ingredient is a topically active anti-inflammatory agent.
11. The process of claim 10 wherein said anti-inflammatory agent is triamcinolone acetonide and said dispersing medium is thickened mineral oil.
12. The process of claim 3 wherein said flexible backing member is selected from the group consisting of polymeric films, woven and nonwoven fabrics, and poly-meric foams.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US94,364 | 1987-09-08 | ||
US07/094,364 US5059189A (en) | 1987-09-08 | 1987-09-08 | Method of preparing adhesive dressings containing a pharmaceutically active ingredient |
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Publication Number | Publication Date |
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CA1333769C true CA1333769C (en) | 1995-01-03 |
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ID=22244718
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Application Number | Title | Priority Date | Filing Date |
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CA000576790A Expired - Fee Related CA1333769C (en) | 1987-09-08 | 1988-09-08 | Adhesive dressing containing a pharmaceutically active ingredient |
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US (1) | US5059189A (en) |
EP (1) | EP0307187B1 (en) |
JP (1) | JP2790290B2 (en) |
AT (1) | ATE124270T1 (en) |
AU (1) | AU610217B2 (en) |
CA (1) | CA1333769C (en) |
DE (1) | DE3854068T2 (en) |
DK (1) | DK497588A (en) |
ES (1) | ES2073401T3 (en) |
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IE (1) | IE68882B1 (en) |
NO (1) | NO180323C (en) |
NZ (1) | NZ225773A (en) |
ZA (1) | ZA886003B (en) |
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DK154806C (en) * | 1986-12-19 | 1989-06-26 | Coloplast As | PROCEDURE CONTAINING AN ACTIVE SUBSTANCE FOR THE PROMOTION OF THE SEA TREATMENT AND PROCEDURES FOR PRODUCING THEREOF |
-
1987
- 1987-09-08 US US07/094,364 patent/US5059189A/en not_active Expired - Lifetime
-
1988
- 1988-08-10 NZ NZ225773A patent/NZ225773A/en unknown
- 1988-08-12 ZA ZA886003A patent/ZA886003B/en unknown
- 1988-08-12 AU AU20694/88A patent/AU610217B2/en not_active Ceased
- 1988-09-07 DK DK497588A patent/DK497588A/en not_active Application Discontinuation
- 1988-09-07 ES ES88308274T patent/ES2073401T3/en not_active Expired - Lifetime
- 1988-09-07 NO NO883972A patent/NO180323C/en not_active IP Right Cessation
- 1988-09-07 IE IE270088A patent/IE68882B1/en not_active IP Right Cessation
- 1988-09-07 DE DE3854068T patent/DE3854068T2/en not_active Expired - Fee Related
- 1988-09-07 EP EP88308274A patent/EP0307187B1/en not_active Expired - Lifetime
- 1988-09-07 AT AT88308274T patent/ATE124270T1/en not_active IP Right Cessation
- 1988-09-08 CA CA000576790A patent/CA1333769C/en not_active Expired - Fee Related
- 1988-09-08 JP JP63227363A patent/JP2790290B2/en not_active Expired - Fee Related
-
1995
- 1995-09-25 GR GR950402629T patent/GR3017511T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPH0199564A (en) | 1989-04-18 |
IE68882B1 (en) | 1996-07-24 |
JP2790290B2 (en) | 1998-08-27 |
ES2073401T3 (en) | 1995-08-16 |
GR3017511T3 (en) | 1995-12-31 |
NO883972L (en) | 1989-03-09 |
NO180323B (en) | 1996-12-23 |
NO180323C (en) | 1997-04-02 |
EP0307187A3 (en) | 1989-10-25 |
DE3854068D1 (en) | 1995-08-03 |
ZA886003B (en) | 1989-04-26 |
US5059189A (en) | 1991-10-22 |
EP0307187A2 (en) | 1989-03-15 |
NZ225773A (en) | 1990-07-26 |
ATE124270T1 (en) | 1995-07-15 |
DK497588D0 (en) | 1988-09-07 |
AU2069488A (en) | 1989-03-09 |
NO883972D0 (en) | 1988-09-07 |
DK497588A (en) | 1989-03-09 |
EP0307187B1 (en) | 1995-06-28 |
DE3854068T2 (en) | 1995-12-07 |
AU610217B2 (en) | 1991-05-16 |
IE882700L (en) | 1989-03-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKLA | Lapsed | ||
MKLA | Lapsed |
Effective date: 20090105 |