Dual drug dosage forms with improved separation of drugs
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United States of America Patent
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N/A
Issued Date -
Jan 20, 2005
app pub date -
Jul 18, 2003
filing date -
Jul 18, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Drug tablets that include a prolonged-release core and an immediate-release layer or shell are prepared with a thin barrier layer of drug-free polymer between the prolonged-release and immediate-release portions of the tablet. The barrier layer is penetrable by gastrointestinal fluid, thereby providing full access of the gastrointestinal fluid to the prolonged-release core, but remains intact during the application of the immediate-release layer, substantially reducing or eliminating any penetration of the immediate-release drug into the prolonged-release portion.
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Family
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