The pain relief rates of ZAC group and cimitidine group were similar(DU,70% vs 87% and GU,100% vs 86%, P >0.05).

• 疼痛症状缓解率ZAC组DU为 70%25 ；GU为 10 0%25 ; 西米替丁组DU为87%25 ；GU为 86%25 (P >0 .；0 5 ) ;