- Chemotherapy. Treatment cycles are 21 days. Doxorubicin, vincristine, and etoposide are given through the central venous catheter by an infusion pump continuously over 96 hours starting day 1 of each cycle. The dose of these drugs may be increased or decreased from cycle to cycle, based on side effects. Mitotane is given in pill form starting day 1 of cycle 1 and is taken every day throughout the entire study. The mitotane dose is gradually increased as long as the side effects are tolerable. Tariquidar is given through the central venous catheter as a 30-minute infusion on days 1 and 3 of every cycle. The tariquidar dose remains the same throughout the study. Treatment will continue for two cycles after all the cancer is gone, or until surgery is done to remove some or all of the remaining cancer, or, if surgery is not an option, until the cancer has grown to where it is defined as progressive disease.