Controlled drug release composition resistant to in vivo mechanic stress
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United States of America Patent
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Issued Date -
Jan 11, 2007
app pub date -
May 14, 2004
filing date -
May 14, 2003
priority date (Note) -
Abandoned
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Abstract
The controlled release units of the present invention are capable of maintaining the drug/s sustained release properties along the gastro-intestinal tract without losing their mechanical resistance induced by the in vivo peristalsis. The formulations object of the present invention are based on a matrix consisting in a glyceryl ester in combination with ethers of cellulose. Such a matrix composition further incorporates the drug/s. The matrix units of the present invention may be obtained by known granulation methods or by direct compression according to the rheological properties of the drug/s. The drug release profile in vitro matches very well with release in vivo, i.e. the controlled release matrix is not damaged by in vivo peristalsis. The present compositions show good drug release properties, even at very early stages after administration, and ensure a constant and complete release of drug within acceptable times.
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