 The Coenzyme Q10 treatment proved to be effective in cancer patients with normal cardiac function prior to the commencement of the adriamycin treatment.These Coenzyme Q10-treated patients could take a significantly higher total accumulated dosage of adriamycin without any significant changes in cardiac hemodynamics or kinetics as compared to chemotherapy patients not on Coenzyme Q10.In the cancer patients with low cardiac function prior to the initiation of therapy, Coenzyme Q10 treatment did not produce the same beneficial results.