IRCT20201209049661N1 IRCT 2021-06-12 Technology and Research Vice-chancellery, Hormozgan University of Medical Sciences Azithromycin vs. clarithromycin for the treatment of chronic sinusitis Comparison of the effect of azithromycin with erythromycin for the treatment of patients with chronic sinusitis 2016-04-20 anticipated 58 Complete https://irct.ir/trial/53511 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Simple randomization was done using a randomization table generated by the Random Allocation software. The unit of randomization was an individual subject. Sealed envelopes were numbered from 1 to 90 including the group of the patient based on the randomization table. Each envelope was allocated to a patients in order of their entrance to the study from 1 to 90, Blinding description: The person responsible for recording patients' symptoms and outcomes was blinded to the groupings of the participants. 3 Chronic sinusitis. Intervention 1: Intervention group: Azithromycin, received 500 mg single-dose azithromycin (SANA MED pharmaceutical Co., Iran) daily for 4 weeks. Intervention 2: Intervention group: Clarithromycin , received 1000 mg of clarithromycin (Tehran Chiemie Pharmaceutical Co., Iran) in two 500-mg doses daily for 4 weeks. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is no further information.