The present invention relates to methods and sets of drugs for the effective treatment of metastatic cancer and the administration of a set of drugs that overcome mechanisms of resistance to DNA-damaging agents, thereby sensitizing cancer cells to said DNA-damaging agents. The methods involve the administration of a set of drugs comprising melphalan, BCNU, hydroxocobalamin, and ascorbic acid. In a preferred embodiment, ethanol is also added to the set of drugs and bone marrow toxicity is reversed with an infusion of bone marrow stem cells. The methods also involve the depletion of GSH in tumors and the selective delivery of drugs to solid tumors. The methods also involve preventing the loss of catalase function and preventing oxidant-induced hemolysis and/or methemoglobin formation in subjects treated with oxidant drugs or agents that generate hydrogen peroxide, wherein said methods comprise the systemic administration of ethanol.
