A crossover clinical trial between granisetron alone and granisetron combined with methylprednisolone (MPL) was undertaken for the prevention of nausea and vomiting during chemotherapy, including cisplatin, in 12 patients with advanced primary and metastatic lung cancer. The antiemetic effect was obtained in 91.7% (11/12 cases) of patients receiving granisetron alone compared to 100% (12/12 cases) of patients receiving the combination of granisetron plus MPL. Complete control of anorexia was achieved in 91.6% (11/12 cases) of patients receiving the combination compared to 58.3% (7/12 cases) of patients receiving granisetron alone. Moreover there was a significant improvement of delayed clinical symptoms including nausea, vomiting, and anorexia in the patients receiving the combination of granisetron plus MPL. Our data suggest that the antiemetic effect of the combination of granisetron plus MPL is superior to granisetron alone in patients receiving cancer chemotherapy.