Cisplatin is commonly used for esophageal and gastric cancer, however, the agent has high emetic risk, classified as highly emetic chemotherapy. Ohtsu et al. demonstrated in patients with advanced gastric cancer that 5-fluorouracil (5-FU) plus cisplatin led to a significantly higher tumor response rate and longer median progression-free survival but not overall survival as compared with 5-FU alone (1). Koizumi et al. also reported in phase 3 study comparing the effect of S-1 alone and its combination with cisplatin in patients with advanced gastric cancer that the combination was superior to S-1 alone in prolonging median progression-free survival (HR: 0.57; p<0.0001) as well as median overall survival (HR: 0.77; p=0.04) but led to more severe adverse drug reactions, including nausea and vomiting (2). Thus, oral fluoropyrimidine and cisplatin combination chemotherapy is currently used as the first-line treatment option for unresectable advanced gastric cancer. On the other hand, Bang et al. reported in patients with human epidermal growth factor receptor 2 (HER2)-positive gastric or gastro-oesophageal junction cancer that addition of trastuzumab (monoclonal antibody to HER2) to chemotherapy led to ignificantly longer median overall survival than chemotherapy alone (3). Thus, oral fluoropyrimidine, cisplatin and trastuzumab combination chemotherapy is currently regarded as the standard chemotherapy for HER2-positive gastric cancer.On the other hand, cisplatin with 5-FU regimen is recommended as neoadjuvant chemotherapy for stage II/III thoracic esophageal cancer and unresectable progressive recurrent esophageal cancer (4, 5).Cisplatin is classified as chemotherapy with high emetic risk (HEC) in several guidelines for prevention of chemotherapy-induced nausea and vomiting (CINV) (6-9).
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