Multicompartmentalized transdermal patches
First Claim
1. In a transdermal or dermal patch for administering a controlled amount of a drug to skin or mucous membrane comprising, in sequence,A. a backing layer which is not permeable to said drug,B. a first membranous layer permeable to said drug, said first membranous layer and said backing layer being sealed together so as to define an enclosure for containing said drug,C. said drug contained within said enclosure,D. an adhesive layer on said first membranous layer, andE. a first removeable protective layer on said adhesive layer,the improvement which comprisessubdividing said enclosure into at least two compartments, at least one of said compartments containing therein a drug, drug concentration, or drug formulation which differs from that contained in at least one other of said compartments.
2 Assignments
0 Petitions
Accused Products
Abstract
A dermal or transdermal patch comprising (1) a backing layer which is non-permeable with respect to a drug formulation to be contained within the patch, (2) a membranous layer, which is permeable to the drug, having a first surface partially in contact with said backing layer so as to define multiple compartments, (3) at least one drug or drug formulation contained within said compartments, (4) an adhesive layer on a second surface of said membranes layer, and (5) a peelable protective cover layer on said adhesive layer.
224 Citations
19 Claims
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1. In a transdermal or dermal patch for administering a controlled amount of a drug to skin or mucous membrane comprising, in sequence,
A. a backing layer which is not permeable to said drug, B. a first membranous layer permeable to said drug, said first membranous layer and said backing layer being sealed together so as to define an enclosure for containing said drug, C. said drug contained within said enclosure, D. an adhesive layer on said first membranous layer, and E. a first removeable protective layer on said adhesive layer, the improvement which comprises subdividing said enclosure into at least two compartments, at least one of said compartments containing therein a drug, drug concentration, or drug formulation which differs from that contained in at least one other of said compartments.
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5. In a transdermal or dermal patch for administering a controlled amount of a drug to skin or mucous membrane comprising, in sequence,
A. a backing layer which is not permeable to said drug, B. a first membranous layer permeable to said drug, said first membranous layer and said backing layer being sealed together so as to define an enclosure for containing said drug, C. said drug contained within said enclosure, D. an adhesive layer on said first membranous layer, and E. a first removeable protective layer on said adhesive layer, the improvement which comprises subdividing said enclosure into at least two compartments, at least one of said compartments containing therein a drug, drug concentration, or drug formulation which is the same as or differs from that contained in at least one other of said compartments wherein at least one compartment, but not all, is modified by having a nonpermeable membrane thereon in addition to or in place of said first membranous layer or has an occlusive adhesive in addition to or in place of said adhesive layer so as to prevent said drug within said modified compartment from passing therethrough.
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6. In a transdermal or dermal patch for administering a controlled amount of a drug to skin or mucous membrane comprising, in sequence,
A. a backing layer which is not permeable to said drug, B. a first membranous layer permeable to said drug, said first membranous layer and said backing layer being sealed together to as to define an enclosure for containing said drug, C. said drug contained within said enclosure, D. an adhesive layer on said first membranous layer, and E. a first removeable protective layer on said adhesive layer, the improvement which comprises subdividing said enclosure into at least two compartments, at least one of said compartments containing therein a drug, drug concentration, or drug formulation which is the same as or differs from that contained in at least one other of said compartments wherein at least one compartment-compartment border comprises a non-burstable permeable membrane and a burstable, non-permeable membrane, said burstable membrane to be broken before, during, or after applying said patch to a patient.
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7. In a transdermal or dermal patch for administering a controlled amount of a drug to skin or mucous membrane comprising, in sequence,
A. a backing layer which is not permeable to said drug, B. a first membranous layer permeable to said drug said first membranous layer and said backing layer being sealed together to as to define an enclosure for containing said drug C. said drug contained within said enclosure, D. an adhesive layer on said first membranous layer, and E. a first removeable protective layer on said adhesive layer, the improvement which comprises subdividing said enclosure into at least two compartments, at least one of said compartments contained therein a drug, drug concentration, or drug formulation which is the same as or differs from that contained in at least one other of said compartments wherein a portion of said backing layer is replaced with a second permeable membrane in contact with said active agent, an additional adhesive layer on said second permeable membrane remote from said active agent and a second removeable protective layer on said additional adhesive, such that upon removal of said first removable protective layer, said patch may be folded upon itself, exposed adhesive to exposed adhesive to result in a final patch having one compartment located on top of another.
Specification