The present invention relates to HDM2-p53 interaction inhibitors for use in the treatment of cancer, wherein the drug is administered by a high dose intermittent dosing regimen. The present invention relates in particular to the HDM2-p53 interaction inhibitor HDM201 and the dosing regimen d1, d8 of a 4 week cycle.本發明係關於用於治療癌症之HDM2-p53交互作用抑制劑,其中該藥物係藉由高劑量間歇性投藥療法投與。 本發明具體而言係關於HDM2-p53交互作用抑制劑HDM201及關於4週週期之第1天、第8天投藥療法。