Method for transdermal iontophoretic delivery of chelated agents
First Claim
1. A method for the iontophoretic transdermal delivery of a chelated iron complex, the method comprising:
- applying an iontophoretic transdermal delivery device to the skin of a subject, the device comprising an electrode and iron comprising a chelated iron complex comprising ferric pyrophosphate;
delivering an electrical current to the skin using the electrode; and
thus transporting the chelated iron complex across the skin, wherein the complex is transported across the skin without precipitation of iron in the skin, thereby reducing chromogenic reactions with the skin relative to the transport of non-chelated iron.
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Accused Products
Abstract
Embodiments provide devices, systems and methods for the transdermal delivery of chelated compounds. One embodiment provides a method for the iontophoretic transdermal delivery of a chelated iron complex for the treatment of anemia. A first patch comprising an active electrode and a chelated iron complex is applied to the skin; a second patch containing an electrode is also applied. An electrical current is then delivered to the skin from the active electrode. The chelated complex is transported across the skin via electromotive force from the current, with the iron being substantially chromogenically unreactive with the skin during transport so that there is little or no tattooing of the skin due to the formation of insoluble oxidative products. The complex is then dissociated by phagocytosis or related process to release the iron where it may be bound by transferrin or ferritin and carried to other sites for storage or metabolic use.
108 Citations
38 Claims
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1. A method for the iontophoretic transdermal delivery of a chelated iron complex, the method comprising:
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applying an iontophoretic transdermal delivery device to the skin of a subject, the device comprising an electrode and iron comprising a chelated iron complex comprising ferric pyrophosphate; delivering an electrical current to the skin using the electrode; and thus transporting the chelated iron complex across the skin, wherein the complex is transported across the skin without precipitation of iron in the skin, thereby reducing chromogenic reactions with the skin relative to the transport of non-chelated iron. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for treating iron deficiency in a patient, the method comprising:
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applying an iontophoretic transdermal delivery device to the skin of the patient, the device comprising an electrode and iron comprising a chelated iron complex comprising ferric pyrophosphate; delivering an electrical current to the skin using the electrode; thus transporting a therapeutically effective amount of the chelated iron complex across the skin, wherein the complex is transported across the skin without precipitation of iron in the skin, thereby reducing chromogenic reactions with the skin relative to the transport of non-chelated iron; and dissociating the complex in tissue to release the iron, thus treating the iron deficiency. - View Dependent Claims (28, 29)
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30. A method for treating iron deficiency in a patient, the method comprising:
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applying an iontophoretic transdermal delivery device to the skin of the patient, the device comprising an electrode and iron comprising a chelated iron complex comprising ferric pyrophosphate; delivering an electrical current to the skin using the electrode; thus transporting a therapeutically effective amount of the chelated iron complex across the skin, wherein the iron is sufficiently electrostatically bound by the chelating agent so that the iron is not available to form insoluble salts within the skin during transport, thereby reducing chromogenic reactions with the skin relative to the transport of non-chelated iron; and dissociating the complex in tissue to release the iron, thus treating the iron deficiency. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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Specification