Process for the preparation of a controlled drug delivery system containing pseudoephedrine and a long acting antihistamine
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United States of America Patent
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Jul 31, 2001
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N/A
app pub date -
Sep 24, 1999
filing date -
Sep 24, 1999
priority date (Note) -
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Abstract
This invention relates to a process for the preparation of a controlled release pharmaceutical composition comprising two discrete zones wherein the first discrete zone comprises therapeutically effective amount of pseudoephedrine or its pharmaceutically acceptable salt as active ingredient and the second discrete zone comprises a therapeutically effective amount of a long-acting antihistamine selected from the group consisting of loratadine, azatidine, fexofenadine, terfenadine, cetirizine, astemizole, and levocabastine, or their pharmaceutically acceptable salt as active ingredient.
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