Objective:To compare the effect of different protocol,ondansetron,ondansetron +dexamethasone(DXM),and ondansetron+DXM+medroxyprogesterone acetate (MPA),in preventing chemotherapy induced vomiting,nausea and anorexia.

• 目的 :比较恩丹西酮、恩丹西酮 +地塞米松、恩丹西酮 +地塞米松 +国产甲孕酮 (倍恩胶囊 )三种止吐方案预防化疗消化道反应的疗效。