ABSTRACT
<p><b>OBJECTIVE</b>To evaluate colon targeting characteristic of Kuikang colon targeted pellets (KCP) with determination of residual baicalin and baicalein concentration in gastrointestinal tract (GIT).</p><p><b>METHOD</b>The baicalin and baicalein were assayed by HPLC. The recovery differences of the drug between KCP and conventional pellets from GIT were investigated, three and six hours after administration.</p><p><b>RESULT</b>The baicalin recovery of KCP (70%) from rat GIT was higher than that of CP (about 20%). Most of KCP were intact at 3 h after oral administration, and distributed in lower ileum. It indicated that release site of KCP was in lower ileum and colon. Six hours later, a small amount of baicalin was recovered in intestime, which showed that the release of baicalin from KCP was complete.</p><p><b>CONCLUSION</b>The determination of residual baicalin in rat GIT was feasibility for evaluating KCP. The result confirmed KCP of colon targeting property.</p>
Subject(s)
Animals , Rats , Colon , Metabolism , Drug Delivery Systems , Drug Implants , Drugs, Chinese Herbal , Metabolism , Flavanones , Metabolism , Flavonoids , Metabolism , Ileum , Metabolism , Logistic Models , Rats, WistarABSTRACT
This paper reviews the lastest progress on oral prolonged-release preparation of traditional Chinese medicine. Four materials, include component, effective parts, single drug, and compound drugs of traditiong Chinese medicine, have been used to produce oral prolonged-release preparation. The main contents are study of preparation and evaluation of in vitro release. There are also some research works on integrative evaluation, pharmacokinetics and pharmacological activity of the prolonged-release preparation. It believes that the study on oral prolonged-release preparation of traditional Chinese medicine will have good prospect.