Abstract
Most of current anticancer drugs have been developed in the past a half century and some of the combination therapies have proved to be active against some type of human malignancies, causing even cure cases. However, the efficacies are limited against solid cancers. Therefore, there are necessities to develop more effective and less toxic treatment regimens, finding more clinically useful drugs. In such circumstances, DDS studies have shown the significant values for finding more useful drugs. Recently many new type of drugs against molecular targets relating to cell-growth, apoptosis, metastases etc. have been studied. The author believes that these drugs against molecular targets also belongs to the category of new DDS studies. In the coming 21 st century, new active drugs may appear from DDS studies.
