Abstract: In accordance with the present invention there is provided a method of treating a mammal having a solid tumor, the method comprising: a) administering to the mammal an effective amount of 3-ainino-1,2,4-benzotriazine 1,4-dioxide; b) administering to the mammal an effective amount of paclitaxel; and c) administering to the mammal an effective amount of a platinum complex. The method provides unexpected synergistic efficacy. The invention further provides a kit for treatment of a mammalian tumor comprising 3-amino-1,2,-benzotriazine 1,4-dioxide, paclitaxel and a platinum complex.

Abstract: In accordance with the present invention there is provided a method of treating a mammal having a solid tumor, the method comprising:a) administering to the mammal an effective amount of 3-amino-1,2,4-benzotriazine 1,4-dioxide;b) administering to the mammal an effective amount of paclitaxel; andc) administering to the mammal an effective amount of a platinum complex.The method provides unexpected synergistic efficacy. The invention further provides a kit for treatment of a mammalian tumor comprising 3-amino-1,2,-benzotriazine 1,4-dioxide, paclitaxel and a platinum complex.

Abstract: A method of inhibiting mammalian topoisomerase II and inhibiting the growth and inducing the regression of malignant cells in mammals by the action of a (S)-3-methyl-7-oxo-2,3-dihydro-7H-pyrido[1,2,3-de][1,4]benzoxazine or -benzothiazine of the formula ##STR1## wherein R.sub.1 is hydrogen or fluoro, R.sub.2 and R.sub.3 each independently is hydrogen or alkyl having 1 to 4 carbon atoms, and X is O, S or S=O; a pharmaceutically acceptable acid-addition salt thereof; or a salt thereof with a pharmaceutically acceptable cation; and certain novel compounds of formula I.