... that acute doxorubicin administration decreased COL- 3 oral bioavailability and prolonged COL- 3 elimination in rats[1 23] In the present study, a potential combination therapy of COL- 3 and tamoxifen ... combination of tamoxifen and COL- 3 is rational, based on the marked antitumor activity of both agents against a variety of solid tumors, such as breast cancer, prostate cancer, lung cancer, colon cancer, ... effects of COL- 3 and tamoxifen, in single agent or in combination against human breast cancer cell lines, MDA-MB- 231 and MCF-7 Finally, attempt would be made to account for an irregular absorption...