Dosage Form for Time-Varying Patterns of Drug Delivery
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United States of America Patent
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app pub date -
May 7, 2007
filing date -
Dec 18, 2001
priority date (Note) -
Abandoned
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Abstract
The present invention provides a multi-release oral drug delivery system that initiates drug release following an initial drug-free release interval, after administration to a subject, and a second drug-free release period before release of another dose of drug. The system has (1) inner compartments enclosed within a semipermeable membrane, and (2) a drug coating on the exterior of the semipermeable membrane surrounded by a microporous membrane, which microporous membrane is permeable to fluid and drug. The drug coating is released after the initial drug-free release interval. An inner compartment drug is released after a second drug-free release interval provided by a drug-free inner compartment.
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