Temporally controlled drug delivery systems

Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Web – sheet or filament bases; compositions of bandages; or...

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424447, 424448, 6048901, A61K 900, A61K 970

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06068853&

ABSTRACT:
A delivery mechanism and device for the passive periodic release of a drug or an active ingredient which avoids the need for external power sources and/or electronic controllers. By taking advantage of oscillating chemical systems, one can change the state, i.e. the pH, of a solution, a drug, enhancer or solubilizer resulting in oscillating the ability of an active ingredient to be delivered transdermally. The pH of a solution can be oscillated over a range of pH values from 2 to 10 by the reduction and oxidation (redox) reactions of salts, such as permanganates, iodates, sulfates, chlorates, or bromates. Upon activation, the delivery system conditions begin to oscillate and with it, the delivery of the active agent oscillates.

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