IRCT20150721023282N10 IRCT 2020-04-25 Esfahan University of Medical Sciences The effectiveness of frankincense in the treatment of oral aphthae Evaluation of the effectiveness of Boswellia serrata extract (frankincense) in the treatment of oral aphthous ulcers compared to placebo 2016-04-20 anticipated 50 Complete https://irct.ir/trial/47339 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Randomization description: Block randomization method was used in which blocks of 4 were used, Blinding description: Drug (frankincense) and placebo tablets will be fully similar and packaged in similar containers. The patient, the prescriber (physician), data analyst, and the laboratory personnel will be blind to the content of containers and intervention type. 3 Oral aphthous ulcer. Intervention 1: Intervention group: orally disintegrating tablets of frankincense extract (manufactured by the faculty of Pharmacy) standardized based on 5.90% w/w of 11-keto-beta-boswellic acid, 4 times daily. Intervention 2: Control group: orally disintegrating tablets of placebo (manufactured by the faculty of Pharmacy), 4 times daily. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no more data.