BackgTound:Gastroesophageal reflux disease (GERD) is one of the most common gastrointestinal complaints.GERD,caused by the reflux of stomach contents into the esophagus,leads to troublesome symptoms such as heartb and regurgitation.It is classified into two types:erosive esophagitis,characterized by visible esophageal mucosa erosion in endoscopy,and non-erosive reflux disease (NERD).GERD is a chronic and recurrent disease that impairs the quality of life and imposes socioeconomic and therapeutic burdens to both patients and society.Objective:Due to the failure of the conventional treatments for GERD and to the traditional use of Amla (Phyllanthus emblica L),in addition to beneficial effects shown in recent studies,we evaluated the safety and efficacy of Amla tablet for improvement of symptoms of patients with NERD.Design,setting,participants and interventions:We designed a double-arm,randomized,double-blind,placebo-controlled clinical trial.Sixty-eight patients who had classic symptoms of GERD (heartb,regurgitation and epigastralgia) for at least three months before the start of the trial were randomized in two parallel groups.Patients in the Amla group received two 500 mg Amla tablets twice a day,after meals,for 4 weeks.In the control group,patients received placebo tablets similar to the Amla prescription.Main outcome measures:The patients were visited at baseline,and at the end of the 2nd and 4th weeks of intervention;their symptoms were measured on a frequency and severity scale for the symptoms of NERD,according to the quality of life in reflux-associated disease questionnaire.Results:Frequencies of heartb and regurgitation in both groups of the study were significantly reduced after intervention (P ＜ 0.001).Repeated measures logistic regression analysis showed that,in the Amla group,there was a more significant reduction in regurgitation frequency,heartbum frequency,regurgitation severity and heartb severity during the study period,compared with the placebo group (P ＜ 0.001).Conclusion:This randomized double-blind,placebo-controlled clinical trial demonstrated that Amla could reduce frequencies of heartb and regurgitation and improve heartb and regurgitation severity in patients with NERD.