Objective: To compare the tolerance of oral rehydration solutions (ORS) and frozen ORS pop in patients with mild or mild-to-moderate dehydration.

Materials and methods: This was a randomized controlled trail (RCT). A convenience sam­ple of 30 patients with acute gastroenteritis, aged between 1 and 12 years, and suffering from mild or mild-to-moderate dehydration admitted in pediatric ward in Songklanagarind Hospital was chosen. The patients were separated into two groups by simple random sampling; 15 pa­tients for each group. The treatment consisted of ORS solution and the innovative frozen ORS pop containing various colors and flavors. The volume of taken ORS compared between ORS

solution and frozen ORS pop in 30 minutes was observe. The data was analyzed by using the Student’s t-test and chi-square; significance indicated by p<0.05.

Results: In 30 minutes, statistical significance between the intake volumes of frozen ORS pop (66.8) and ORS solution (39.8) was observed (p=0.023). There were no side effects of frozen ORS pop. There was a statistically significant association between parents satisfaction and frozen ORS pop (86.7) than ORS solution (40) (p=0.008).

Conclusion: The intake volume of each forms of ORS in pediatric rehydration was significant. There were no side effects. The difference between forms of ORS and parents satisfaction was statisti­cally significant. Frozen ORS pop can be used in children with acute gastroenteritis especially in children rejected to ORS solution.