IRCT20220509054789N1 IRCT 2022-05-17 Tabriz University of Medical Sciences Comparison of the effectiveness of mouthwash containing betamethasone with dexamethasone in reducing the pain level of oral lichen planus Comparison of the effectiveness of mouthwash containing betamethasone with mouthwash containing dexamethasone in reducing the pain level of patients with symptomatic oral lichen planus 2022-06-22 anticipated 34 Complete https://irct.ir/trial/63489 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Patients will be randomly divided into two groups A and B. Sealed envelopes will be used for this purpose. They will be sealed by writing group A or B inside the envelopes. The envelopes are then mixed and the first envelope is removed at each patient's visit and assigned to the group inside the envelope. The examining dentist does not know which group A and B each belong to, Blinding description: The double-blind method will be implemented, In this way, the patient, researcher and data analyzer will not be aware of the contents of the bottles. Sampling and assignment of individuals to each group will remain secret for the patient and the researcher until the end of the study. Bottles with similar appearance will be divided into two categories. 3 Oral lichen planus. Intervention 1: Intervention group: 15 cc long-acting betamethasone (Kimia Drug Co.) in combination with 200 cc of AlMg stomach syrup, 3 times a day, 5 cc each time for 30 seconds, for 6 weeks. Intervention 2: Control group: 15 cc long-acting Dexamethasone (Kimia Drug Co.) in combination with 200 cc of AlMg stomach syrup, 3 times a day, 5 cc each time for 30 seconds, for 6 weeks. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information.