There were 318 subjects, 150 in the simethicone group and 168 in the cinnamon stomachic mixture group. The baseline characteristics of the patients are shown in Table 1. Seventy percent of the patients were females. The mean age, mean body weight and mean symptom score of the patients in both groups were not significantly different. Concomitant treatments such as antacid were given to 20% and 11.9% of the patients in the simethicone group and the cinnamon stomachic mixture group respectively (p=0.07). A full compliance to the medications was reported in 82% and 89.3% of the patients in the simethicone group and the cinnamon stomachic mixture group respectively (p=0.09). The mean symptom scores at the baseline and those during and at the end of treatment are shown in Table 2. The mean symptom scores at the baseline in both groups were not significantly different (p=0.14). The mean symptom score on day 7 and day 14 was significantly less than that at the baseline in both groups (p