Abstract
The phospholipids have received much attention as a useful material in designing pharmaceutical preparations partly because of its biocompatibility. Lipid vehicle consisting of phospholipids is one of the promising carrier systems for various drugs. So far, some drug delivery systems of lipid vehicles have been developed and commercially available. This paper will report that the surface modification of lipid vehicles with suitable polymers leads to producing the more functional drug carriers. The studies reviewed in this paper may contribute to development of the oral delivery systems of peptide drugs, long circulating drug carriers and so on.
