IRCT20160523028008N16 IRCT 2021-08-25 Hamedan University of Medical Sciences Evaluation of the effectiveness of doxycycline in the treatment of outpatients with Covid-19 Evaluation of the effectiveness of doxycycline in the treatment of outpatients with Covid-19 . 2021-10-02 anticipated 88 Complete https://irct.ir/trial/58247 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The patients will be randomly assigned to intervention and control groups using block randomization. For this purpose, we will prepare four sheets of paper, writing on two sheets the name of the intervention and on the other two sheets the name of the control. The paper sheets will be pooled, placed in a container, and randomly drawn one at a time for each patient without replacement until all four sheets are drawn. The four paper sheets will be then placed back into the container, and this action repeated until the sample size is reached. 2-3 COVID-19, virus identified. Intervention 1: Intervention group: Doxycycline capsules are given orally made by Iran Daru Company (Iran) 100 mg twice a day for 10 days along with standard care and medication measures for Covid patients. Intervention 2: Control group: Standard care and medication measures for Covid patients. No - There is not a plan to make this available Justification or reason for not sharing IPD is There is not a plan to make this available