WO2000037058A1 - Transparent transdermal nicotine delivery devices - Google Patents

Transparent transdermal nicotine delivery devices Download PDF

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Publication number
WO2000037058A1
WO2000037058A1 PCT/US1999/029731 US9929731W WO0037058A1 WO 2000037058 A1 WO2000037058 A1 WO 2000037058A1 US 9929731 W US9929731 W US 9929731W WO 0037058 A1 WO0037058 A1 WO 0037058A1
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WO
WIPO (PCT)
Prior art keywords
nicotine
backing
less
transdermal
skin
Prior art date
Application number
PCT/US1999/029731
Other languages
French (fr)
Inventor
Robert M. Gale
Original Assignee
Alza Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
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Priority to AU31217/00A priority Critical patent/AU774594B2/en
Priority to PL99348337A priority patent/PL195871B1/en
Priority to AT99965265T priority patent/ATE447398T1/en
Priority to CA002354621A priority patent/CA2354621C/en
Priority to DE69941629T priority patent/DE69941629D1/en
Priority to JP2000589169A priority patent/JP4864204B2/en
Priority to EP99965265A priority patent/EP1140039B1/en
Application filed by Alza Corporation filed Critical Alza Corporation
Priority to IL14377899A priority patent/IL143778A0/en
Priority to DK99965265.4T priority patent/DK1140039T3/en
Priority to NZ512432A priority patent/NZ512432A/en
Priority to BR9916214-8A priority patent/BR9916214A/en
Publication of WO2000037058A1 publication Critical patent/WO2000037058A1/en
Priority to IL143778A priority patent/IL143778A/en
Priority to NO20013012A priority patent/NO332084B1/en
Priority to HK02101883.6A priority patent/HK1040915B/en

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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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/465—Nicotine; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/445—Non condensed piperidines, e.g. piperocaine
    • A61K31/4465—Non condensed piperidines, e.g. piperocaine only substituted in position 4
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/32—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers, poly(meth)acrylates, or polyvinyl pyrrolidone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/34—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0014—Skin, i.e. galenical aspects of topical compositions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
    • A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
    • A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
    • A61K9/703—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
    • 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
    • A61K9/7084—Transdermal patches having a drug layer or reservoir, and one or more separate drug-free skin-adhesive layers, e.g. between drug reservoir and skin, or surrounding the drug reservoir; Liquid-filled reservoir patches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/30—Drugs for disorders of the nervous system for treating abuse or dependence
    • A61P25/34—Tobacco-abuse
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
    • A61K2800/26—Optical properties
    • A61K2800/262—Transparent; Translucent

Definitions

  • the present invention relates to transdermal delivery devices for administering nicotine for use in smoking cessation treatments.
  • the invention is directed to transdermal nicotine delivery devices which are transparent.
  • transdermal route of parenteral drug delivery provides many advantages over other administration routes.
  • Transdermal systems for delivering a wide variety of drugs or other beneficial agents are described in
  • transdermal drug delivery devices of the prior art utilize an impermeable backing on the skin distal surface of the device to protect the device from damage and to prevent loss of the active ingredient(s).
  • these backing layers are often tinted to a color similar to skin tones.
  • pigmented backing layers for transdermal systems which approximate all skin colors.
  • Another approach that has been taken is to provide transparent transdermal systems in which all elements forming a device are sufficiently transparent to permit the natural skin color to be visible through the device.
  • Marketed products which take this approach include the Alora® and Climara® estrogen replacement patches and the Duragesic® transdermal fentanyl delivery system.
  • Nicotine is a liquid alkaloid that is colorless, volatile, strongly alkaline, readily oxidized, subject to degradation on exposure to light and highly permeable through not only the human skin, but also many of the polymers conventionally used in the fabrication of backing layers and packaging materials for transdermal products (see for example U.S. Patent 5,077,104).
  • the backing layers of the transdermal nicotine delivery devices currently available utilize opaque, skin-colored multilaminate films which typically contain a metallized layer, such as aluminum.
  • transdermal nicotine patches use opaque backings, but many of these devices, due to the complexities of handling and processing nicotine, have other components which are not transparent.
  • the original Prostep® transdermal nicotine product used a drug reservoir in the form of an opaque white gel, held in place by an opaque adhesive overlay.
  • the Habitrol® and Nicotrol® nicotine patches incorporated absorbant pads in the drug reservoir in which the nicotine was absorbed. It has also been proposed to co-administer nicotine with other substances that improve nicotine cessation therapy. See, for example, patents 4,908,213; 5,599,554; and 5,726,190 noted above, and WO 97/33581.
  • the present invention relates to transparent transdermal delivery devices for the transdermal administration of nicotine, either alone or in combination with other agents.
  • Such devices should be sufficiently transparent so that the subject's skin can be clearly visible through the device when it is placed on the skin. Identifying indicia can be printed on the device in light colored or white ink in a manner which is not noticeable from a short distance, but is readable on close inspection.
  • Preferred devices of this invention utilize, as the backing layer, a transparent polymeric film which has a permeability to nicotine of less than 1 ⁇ g / cm 2 hr, preferably less than 0.5 ⁇ g / cm 2 hr, a solubility for nicotine that is less than 1% by weight and preferably less than 0.1 %.
  • Such films are preferably less than about 6 mils thick and most preferably about 2-4 mils thick.
  • Such films are used in combination with one or more of the conventional elements of a transdermal device (other than the removable release liner) such as the drug reservoir, adhesive and rate controlling membranes, which must also be sufficiently transparent as to permit the natural skin color to be clearly visible through the assembled device after placement on the skin.
  • the finished product should have an Opacity Index of less than about 48.6%, preferably less than about 35.11% and more preferably less than 20%.
  • the backing layer In addition to being transparent and being sufficiently impermeable to nicotine, the backing layer must also have sufficient mechanical strength and physical integrity to maintain the system intact throughout its intended administration period, which is typically 18-24 hours, and must provide a stable interface with adjoining layers such as the drug reservoir or adhesive layers of the transdermal device. This combination of properties is not always found in one material, and thus the transparent backing layers used on the devices of this invention can be multilaminate films.
  • a backing layer In addition to having a low permeability to nicotine, a backing layer must also have a low solubility for nicotine. This is because nicotine is toxic and it could be dangerous for a child, for example, to lick the backing layer if it contained a substantial amount of dissolved nicotine.
  • Suitable polymer materials possessing properties required by this invention include Scotchpak® 1220 which is a polyethylene terephthalate /ethylene vinyl acetate (PET EVA), bilaminate film sold by the 3M Company, Minneapolis, Minnesota, and Saranex® 2057 which is a high density polyethylene (HDPE)/ethylene acrylic acid (EAA)/nylon/EAA multilaminate available from the Dow Chemical Company, Midland, Michigan.
  • Scotchpak® 1220 which is a polyethylene terephthalate /ethylene vinyl acetate (PET EVA), bilaminate film sold by the 3M Company, Minneapolis, Minnesota, and Saranex® 2057 which is a high density polyethylene (HDPE)/ethylene acrylic acid (EAA)/nylon/EAA multilaminate available from the Dow Chemical Company, Midland, Michigan.
  • HDPE high density polyethylene
  • EAA ethylene acrylic acid
  • Nylon/EAA multilaminate available from the Dow Chemical Company, Midland, Michigan.
  • These films comprising a graft copolymer formed from about 73-77% acrylonitrile and from about 23-27% methyl acrylate copolymerized in the presence of about 8-10 parts by weight of butadiene/acrylonitrile copolymers containing approximately 70% by weight of polymer units derived from butadiene are preferred backing materials.
  • the transparent transdermal delivery devices of this invention can be of any of the forms described in the aforementioned patents.
  • the preferred form comprises a laminate of the backing layer, a nicotine reservoir layer which contains nicotine dissolved in a carrier at a concentration below the saturation concentration of nicotine in the carrier. If the drug reservoir component is self adhesive, a simple monolithic device could be employed.
  • the device may also contain other drugs or other active substances which cooperate with or enhance the effect of nicotine in smoking cessation, smoking replacement or smoking substitution therapy.
  • a removable release liner would normally be applied on the adhesive surface of the patch that is used to keep the device on the skin, which release liner is removed prior to use.
  • the adhesive component is preferably a pressure sensitive adhesive including, but not limited to, polysiloxanes, polyacrylates, polyurethanes, acrylic adhesives including cross linked or uncross linked acrylic copolymers, vinyl acetate adhesives, ethylene vinylacetate copolymers, and natural or synthetic rubbers including polybutadienes, polyisoprenes, and polyisobutylene adhesives, and mixtures and graft copolymers thereof.
  • the devices may also be provided with hydrophilic water absorbing polymers known in the art such as polyvinyl alcohol and polyvinyl pyrolidone individually or in combination.
  • the adhesive can be used to form a monolithic delivery device in which the nicotine is dissolved in the adhesive to form a self- adhesive drug reservoir.
  • the adhesive can be applied to the surface of a non-adhesive reservoir in which nicotine is dissolved, to form a multilaminate device.
  • a rate-controlled membrane can also be interfaced between the nicotine reservoir and the adhesive, as is known to the art.
  • the nicotine can be administered in combination with another agent which could include anti-anxiolytics, antihypertensives, antidepressants, and appetite suppressants, such as fluoxetine, caffeine, buspirone, phenylpropanolamine, clonidine, paroxetine, citalopram, and sertraline.
  • the nicotine in the device is present in the reservoir at a subsaturated condition (i.e. less than unit activity) such that no undissolved nicotine is present in the reservoir. If other agents are present in the device, they are preferably present fully dissolved, but can be present in undissolved form so long as the end product displays the proper degree of transparency.
  • nicotine and optionally other agents to be co- administered are delivered through the skin or other body surface at a therapeutically effective rate for a predetermined time period which for nicotine is preferably 16-24 hours.
  • transdermal therapeutic devices of the present invention are prepared in a manner known in the art, such as by those procedures described in the transdermal device patents listed previously herein.
  • transdermal patches were tested to determine their transparency and compared to the transparent nicotine patches according to this invention.
  • the nicotine patches were prepared as set forth in Example IV of U.S. Patent No. 5,004,610 with a PET/EVA (Scotchpak® 1220, 3M, Minneapolis, MN) or Saranex® (Dow Chemical Company, Midland, Ml) backing substituted for the Scotchpak 1006 backing.
  • the light transmitted through the various systems was measured by a Macbeth 1500/Plus color measurement system (Kollmorgem Instruments Corp., Newburgh, NY). Table 1 shows the Opacity Index, which is the percentage of incidental light which is absorbed by passage through the device, for the various systems tested.
  • transdermal devices according to this invention should have an Opacity Index less than 48.6%, preferably less than 35.11%, more preferably less than 20%.

Abstract

A transparent transdermal delivery device for delivering nicotine which has an Opacity Index of less than 48.6 %.

Description

TRANSPARENT TRANSDERMAL NICOTINE DELIVERY DEVICES
Claim of Priority
The inventor claims the benefit of the filing date of provisional applications S.N. 60/112,730; 60/124,679 and 60/126,798.
Field of the Invention
The present invention relates to transdermal delivery devices for administering nicotine for use in smoking cessation treatments. In particular, the invention is directed to transdermal nicotine delivery devices which are transparent.
Background of the Invention
The transdermal route of parenteral drug delivery provides many advantages over other administration routes. Transdermal systems for delivering a wide variety of drugs or other beneficial agents are described in
U.S. Patent Nos. 3,598,122; 3,598,123; 3,731 ,683; 3,797,494; 4,031 ,894;
4, 144,317; 4,201 ,211 ; 4,286,592; 4,314,557; 4,379,454; 4,435,180;
4,559,222; 4,568,343; 4,573,995; 4,588,580; 4,645,502; 4,698,062;
4,704,282; 4,725,272; 4,781 ,924; 4,788,062; 4,816,258; 4,849,226; 4,904,475; 4,908,027; 4,917,895; 4,938,759; 4,943,435; 5,004,610;
5,071 ,656; 5,122,382; 5,141 ,750; 5,284,660; 5,314,694; 5,342,623;
5,411 ,740; and 5,635,203, which are hereby incorporated in their entirety by reference.
The administration of nicotine buccally, nasally and transdermally to assist a patient desiring to quit smoking has been shown to be clinically effective in reducing the rate of recidivism. Nicotine chewing gum and transdermal nicotine are two of the most widely used forms of nicotine replacement therapy currently available. Transdermal devices for administering nicotine are disclosed in U.S. Patent Nos. 4,597,961 ; 4,758,434; 4,764,382; 4,839,174; 4,908,213; 4,915,950; 4,943,435; 4,946,853; 5,004,610; 5,016,652; 5,077,104; 5,230,896; 5,411 ,739;
5,462,745; 5,508,038; 5,599,554; 5,603,947 and 5,726,190, for example, which are hereby incorporated in their entirety by reference.
Most of the transdermal drug delivery devices of the prior art utilize an impermeable backing on the skin distal surface of the device to protect the device from damage and to prevent loss of the active ingredient(s). In order to improve user satisfaction, these backing layers are often tinted to a color similar to skin tones. However, as can be readily appreciated, it is not commercially practical to provide pigmented backing layers for transdermal systems which approximate all skin colors. Another approach that has been taken is to provide transparent transdermal systems in which all elements forming a device are sufficiently transparent to permit the natural skin color to be visible through the device. Marketed products which take this approach include the Alora® and Climara® estrogen replacement patches and the Duragesic® transdermal fentanyl delivery system. When these devices are applied to the skin, the patient's natural skin color is visible through the patch, making the presence of the patch extremely inconspicuous. Government regulations require that these products bear identifying indicia, but the indicia can be printed on these devices in light colored or white ink which is not noticeable from a distance of several feet, but is still readable on close inspection.
Such transparent patches have been found useful with non-volatile drugs such as fentanyl and hormone replacement steroids, but no such transparent product has been developed for the delivery of nicotine.
Nicotine is a liquid alkaloid that is colorless, volatile, strongly alkaline, readily oxidized, subject to degradation on exposure to light and highly permeable through not only the human skin, but also many of the polymers conventionally used in the fabrication of backing layers and packaging materials for transdermal products (see for example U.S. Patent 5,077,104). As a result, the backing layers of the transdermal nicotine delivery devices currently available utilize opaque, skin-colored multilaminate films which typically contain a metallized layer, such as aluminum.
Not only do the commercially available transdermal nicotine patches use opaque backings, but many of these devices, due to the complexities of handling and processing nicotine, have other components which are not transparent. For example, the original Prostep® transdermal nicotine product used a drug reservoir in the form of an opaque white gel, held in place by an opaque adhesive overlay. The Habitrol® and Nicotrol® nicotine patches incorporated absorbant pads in the drug reservoir in which the nicotine was absorbed. It has also been proposed to co-administer nicotine with other substances that improve nicotine cessation therapy. See, for example, patents 4,908,213; 5,599,554; and 5,726,190 noted above, and WO 97/33581.
SUMMARY OF THE INVENTION
The present invention relates to transparent transdermal delivery devices for the transdermal administration of nicotine, either alone or in combination with other agents. Such devices should be sufficiently transparent so that the subject's skin can be clearly visible through the device when it is placed on the skin. Identifying indicia can be printed on the device in light colored or white ink in a manner which is not noticeable from a short distance, but is readable on close inspection. DETAILED DESCRIPTION OF THE INVENTION
Preferred devices of this invention utilize, as the backing layer, a transparent polymeric film which has a permeability to nicotine of less than 1 μg / cm2 hr, preferably less than 0.5 μg / cm2 hr, a solubility for nicotine that is less than 1% by weight and preferably less than 0.1 %. Such films are preferably less than about 6 mils thick and most preferably about 2-4 mils thick. Such films are used in combination with one or more of the conventional elements of a transdermal device (other than the removable release liner) such as the drug reservoir, adhesive and rate controlling membranes, which must also be sufficiently transparent as to permit the natural skin color to be clearly visible through the assembled device after placement on the skin. The finished product should have an Opacity Index of less than about 48.6%, preferably less than about 35.11% and more preferably less than 20%.
In addition to being transparent and being sufficiently impermeable to nicotine, the backing layer must also have sufficient mechanical strength and physical integrity to maintain the system intact throughout its intended administration period, which is typically 18-24 hours, and must provide a stable interface with adjoining layers such as the drug reservoir or adhesive layers of the transdermal device. This combination of properties is not always found in one material, and thus the transparent backing layers used on the devices of this invention can be multilaminate films. In addition to having a low permeability to nicotine, a backing layer must also have a low solubility for nicotine. This is because nicotine is toxic and it could be dangerous for a child, for example, to lick the backing layer if it contained a substantial amount of dissolved nicotine.
Suitable polymer materials possessing properties required by this invention include Scotchpak® 1220 which is a polyethylene terephthalate /ethylene vinyl acetate (PET EVA), bilaminate film sold by the 3M Company, Minneapolis, Minnesota, and Saranex® 2057 which is a high density polyethylene (HDPE)/ethylene acrylic acid (EAA)/nylon/EAA multilaminate available from the Dow Chemical Company, Midland, Michigan. Nitrile rubber graft copolymers with acrylonitrile and methyl acrylate sold as Barex® films described in U.S. Patent 5,077,104 noted above, can also be used. These films, comprising a graft copolymer formed from about 73-77% acrylonitrile and from about 23-27% methyl acrylate copolymerized in the presence of about 8-10 parts by weight of butadiene/acrylonitrile copolymers containing approximately 70% by weight of polymer units derived from butadiene are preferred backing materials. The transparent transdermal delivery devices of this invention can be of any of the forms described in the aforementioned patents. The preferred form, however, comprises a laminate of the backing layer, a nicotine reservoir layer which contains nicotine dissolved in a carrier at a concentration below the saturation concentration of nicotine in the carrier. If the drug reservoir component is self adhesive, a simple monolithic device could be employed. However, in many cases it is desirable to include additional components such as rate controlling membranes, and a separate adhesive layer for maintaining the devices on the skin such as is described in U.S. Patents 5,004,610 and 5,342,623 listed above. It is further contemplated that in addition to nicotine, the device may also contain other drugs or other active substances which cooperate with or enhance the effect of nicotine in smoking cessation, smoking replacement or smoking substitution therapy. For all these devices, a removable release liner would normally be applied on the adhesive surface of the patch that is used to keep the device on the skin, which release liner is removed prior to use.
Various materials suited for fabrication of the various components are known in the art and are disclosed in the aforementioned patents.
The adhesive component is preferably a pressure sensitive adhesive including, but not limited to, polysiloxanes, polyacrylates, polyurethanes, acrylic adhesives including cross linked or uncross linked acrylic copolymers, vinyl acetate adhesives, ethylene vinylacetate copolymers, and natural or synthetic rubbers including polybutadienes, polyisoprenes, and polyisobutylene adhesives, and mixtures and graft copolymers thereof. The devices may also be provided with hydrophilic water absorbing polymers known in the art such as polyvinyl alcohol and polyvinyl pyrolidone individually or in combination. The adhesive can be used to form a monolithic delivery device in which the nicotine is dissolved in the adhesive to form a self- adhesive drug reservoir. Alternatively, the adhesive can be applied to the surface of a non-adhesive reservoir in which nicotine is dissolved, to form a multilaminate device. A rate-controlled membrane can also be interfaced between the nicotine reservoir and the adhesive, as is known to the art.
The nicotine can be administered in combination with another agent which could include anti-anxiolytics, antihypertensives, antidepressants, and appetite suppressants, such as fluoxetine, caffeine, buspirone, phenylpropanolamine, clonidine, paroxetine, citalopram, and sertraline. The nicotine in the device is present in the reservoir at a subsaturated condition (i.e. less than unit activity) such that no undissolved nicotine is present in the reservoir. If other agents are present in the device, they are preferably present fully dissolved, but can be present in undissolved form so long as the end product displays the proper degree of transparency. In the present invention, nicotine and optionally other agents to be co- administered are delivered through the skin or other body surface at a therapeutically effective rate for a predetermined time period which for nicotine is preferably 16-24 hours.
The transdermal therapeutic devices of the present invention are prepared in a manner known in the art, such as by those procedures described in the transdermal device patents listed previously herein.
The following example is offered to illustrate the practice of the present invention and is not intended to limit the invention in any manner. EXAMPLE 1
Various commercially available transdermal patches were tested to determine their transparency and compared to the transparent nicotine patches according to this invention. The nicotine patches were prepared as set forth in Example IV of U.S. Patent No. 5,004,610 with a PET/EVA (Scotchpak® 1220, 3M, Minneapolis, MN) or Saranex® (Dow Chemical Company, Midland, Ml) backing substituted for the Scotchpak 1006 backing. The light transmitted through the various systems was measured by a Macbeth 1500/Plus color measurement system (Kollmorgem Instruments Corp., Newburgh, NY). Table 1 shows the Opacity Index, which is the percentage of incidental light which is absorbed by passage through the device, for the various systems tested.
Table 1 : Patch Opacity
Figure imgf000009_0001
The Minitran® nitroglycerine system is clearly visible from a distance of about 5 feet, whereas the FemPatch® is significantly less noticeable. The Alora®, Climara® and Nicoderm® patches, however, are extremely inconspicuous. Accordingly, transdermal devices according to this invention should have an Opacity Index less than 48.6%, preferably less than 35.11%, more preferably less than 20%. Having thus generally described our invention and preferred embodiments thereof, it is apparent that various modifications and substitutions will be apparent to workers skilled in the art. These modifications and substitutions can be made without departing from the scope of our invention which is limited only by the following claims.

Claims

We Claim:
1. A device for the transdermal administration of nicotine comprising a backing layer, a drug reservoir layer containing nicotine carried by said backing layer, and means for maintaining the device in nicotine transmitting relationship with the skin, wherein the device is sufficiently transparent to permit the skin of the subject to which it is applied to be visible through said device.
2. The device of claim 1 wherein said backing has a nicotine permeability of less than about 1.0 μg / cm2 ' hr.
3. A device according to claim 1 wherein the backing has a nicotine permeability of less than 0.5 μg / cm2 hr.
4. A device according to claim 2 wherein the backing has a solubility for nicotine of less than about 1 wt%.
5. A device according to Claim 3 wherein the backing has a solubility for nicotine of less than about 0.1 wt%.
6. A device according to claim 4 wherein the device has an Opacity Index less than about 48.6%.
7. A device according to claim 6 wherein the device has an Opacity Index of less than 35.11%.
8. A device according to claim 6 wherein the device has an Opacity Index of less than 20%.
9. The device of claim 1 wherein said backing is formed from a material selected from the group consisting of PET/EVA laminates, HDPE/EAA/nylon/EAA multilaminate and a film comprising a graft copolymer formed from about 73-77% acrylonitrile and from about 23-27% methyl acrylate copolymerized in the presence of about 8-10 parts by weight of butadiene/acrylonitrile copolymers containing approximately 70% by weight of polymer units derived from butadiene.
PCT/US1999/029731 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices WO2000037058A1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
BR9916214-8A BR9916214A (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
EP99965265A EP1140039B1 (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
AT99965265T ATE447398T1 (en) 1998-12-18 1999-12-14 CLEAR TRANSDERMAL NICOTINE DELIVERY DEVICES
CA002354621A CA2354621C (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
IL14377899A IL143778A0 (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
JP2000589169A JP4864204B2 (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery device
PL99348337A PL195871B1 (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
AU31217/00A AU774594B2 (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
DE69941629T DE69941629D1 (en) 1998-12-18 1999-12-14 TRANSPARENT TRANSDERMAL NICOTINE DERIVATIVES
DK99965265.4T DK1140039T3 (en) 1998-12-18 1999-12-14 Transparent devices for percutaneous nicotine administration
NZ512432A NZ512432A (en) 1998-12-18 1999-12-14 Transparent transdermal nicotine delivery devices
IL143778A IL143778A (en) 1998-12-18 2001-06-14 Transparent transdermal nicotine delivery devices
NO20013012A NO332084B1 (en) 1998-12-18 2001-06-18 Transparent device for transdermal administration of nicotine
HK02101883.6A HK1040915B (en) 1998-12-18 2002-03-12 Transparent transdermal nicotine delivery devices

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US11273098P 1998-12-18 1998-12-18
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US8999379B2 (en) 1998-12-18 2015-04-07 Alza Corporation Transparent transdermal nicotine delivery devices
US8075911B2 (en) 1998-12-18 2011-12-13 Alza Corporation Transparent transdermal nicotine delivery devices
US9205059B2 (en) 1998-12-18 2015-12-08 Alza Corporation Transparent transdermal nicotine delivery devices
US8663680B2 (en) 1998-12-18 2014-03-04 Alza Corporation Transparent transdermal nicotine delivery devices
DE10018834A1 (en) * 2000-04-15 2001-10-25 Lohmann Therapie Syst Lts Transdermal or transmucosal pharmaceutical dosage form for treatment of nicotine dependence or smoking withdrawal contains nicotine compound or substitute and CNS active compound
US10653636B2 (en) 2003-04-17 2020-05-19 Lts Lohmann Therapie-Systeme Ag Medical active substance patch with reduced optical conspicuousness on the skin
US11426358B2 (en) 2003-04-17 2022-08-30 Lts Lohmann Therapie-Systeme Ag Medical active substance patch with reduced optical conspicuousness on the skin
US10646453B2 (en) 2003-04-17 2020-05-12 Lts Lohmann Therapie-Systeme Ag Medical active substance patch with reduced optical conspicuousness on the skin
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US20150164820A1 (en) 2015-06-18
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US8663680B2 (en) 2014-03-04

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