Device and method for iontophoretic drug delivery
First Claim
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1. An iontophoretic delivery device, comprising:
- a source of current;
an active electrode element in electrical contact with the source of current and adapted to make ion-transmitting contact with a body surface of a host, the active electrode element comprising a single polymer layer adapted to be placed in an ion-transmitting relation with the body surface and which contains an active agent having an electrical charge and being suitable for administration through the body surface of the host, said polymer layer containing an ionic organic polymer component with counter ions, said ionic organic polymer component having at least some pendent substituents having said charge; and
a counter electrode element in electrical contact with the current source and being adapted to be placed in ion-transmitting relation with the body surface.
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Abstract
An iontophoretic device having a two-layer active electrode element is disclosed. The active element is composed of overlapping skin contact hydrogel and carrier layers. The carrier layer contains dispersed or dissolved active agent. The active electrode element maintains the active agent in stable form and permits efficient transport of the active agent to the host. Also disclosed is an iontophoretic device having a single layer active electrode element. The single layer is a hydrogel as manufactured or substantially dry and capable of being hydrated before use. The skin contact hydrogel of the two-layer active electrode element preferably.
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Citations
15 Claims
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1. An iontophoretic delivery device, comprising:
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a source of current; an active electrode element in electrical contact with the source of current and adapted to make ion-transmitting contact with a body surface of a host, the active electrode element comprising a single polymer layer adapted to be placed in an ion-transmitting relation with the body surface and which contains an active agent having an electrical charge and being suitable for administration through the body surface of the host, said polymer layer containing an ionic organic polymer component with counter ions, said ionic organic polymer component having at least some pendent substituents having said charge; and a counter electrode element in electrical contact with the current source and being adapted to be placed in ion-transmitting relation with the body surface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An active electrode element for an iontophoretic device suitable for administration of an active agent through a body surface of a host, comprising:
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a single polymer layer containing the active agent, the active agent having an electrical charge; and said polymer layer containing an ionic organic polymer component with counter ions, said ions organic polymer component having at least some pendent groups with said charge. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus comprising:
an active electrode element adapted to make ion-transmitting contact with a body surface of a host, the active electrode element comprising a single polymer layer adapted to be placed in an ion-transmitting relation with the body surface and which contains an active agent having an electrical charge, said polymer layer containing an ionic organic polymer component having at least some pendent substituents having said charge. - View Dependent Claims (14, 15)
Specification