Composition for solid pharmaceutical preparations of active vitamins D.sub.3
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United States of America Patent
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Mar 8, 1988
Issued Date -
N/A
app pub date -
Mar 16, 1987
filing date -
Feb 22, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention is concerned with a composition for solid pharmaceutical preparations of active vitamins D.sub.3, having the remarkably improved stability of active vitamins D.sub.3, and an extremely advantageous process for the preparation thereof from the industrial viewpoint. The composition of this invention is a composition for solid pharmaceutical preparations of active vitamins D.sub.3 prepared by forming an outer layer comprising active vitamins D.sub.3 and an excipient, which is readily soluble in an organic solvent, around an inner layer comprising an excipient which is slightly soluble in an organic solvent.
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