Abstract
The combination of mitoxantrone with lucanthone, a schistosomicidal and nonmyelotoxic agent, yielded a therapeutic synergism in L 1210 and P 388 leukemia with no increase in toxicity. In that combination the nonmyelotoxic lucanthone enabled the use of the optimal dose of mitoxantrone. The recent hypothesis that planar polycyclic aromatic compounds, mostly comprised by the term intercalators, intercalate with DNA or bind to DNA may need receiving with respect to membrane target sites.