Method: 31 patients with RAS participated in this double-blind clinical trial. Subjects were randomly divided in two groups. Control group (n=14) received drug mixture as drug A (diphenhydramine and AlMgS) and case (n=17) received drug B ( ibuprofen, diphenhydramine and AlMgS). Drugs were topically applied on ulcers by the patients 3 times a day for 3 days. Patients were re-examined for the symptoms on the fourth day following their first visits using VAS (Visual Analogue Scale) tool. Statistical analysis was performed using t-test and chi-square test.
Result: Pain was significantly reduced in both groups (P<0.001) however, the difference in pain decrease among both groups was not statistically significant (P=0.358). Also, no significant difference between two groups was detected regarding the duration of pain or burning sensation (P=0.57).
Conclusion: The results of this study demonstrate that in comparison with diphenhydramine and AlMgS syrup, the studied mixture did not effectively reduce pain level, duration and burning sensation.