IRCT20130522013423N2 IRCT 2022-05-18 Mashhad University of Medical Sciences Evaluation of the effect of Echinacea syrup on outcome in lower of respiratory infections of COVID-19 The effect of Echinacea syrup on outcome in lower respiratory infections in patients with covid-19 2022-05-15 anticipated 66 Complete https://irct.ir/trial/63029 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: In this study, a table of random numbers is used for randomization. Numbers are read from left to right. The randomization unit is also individual. For concealment, opaque sealed envelopes with random sequences are used. At the time of sample selection, an envelope is assigned to each patient. Even numbers are considered for the intervention group and odd numbers for the control group, Blinding description: In this single-blind study, data analyzer are blinded to the information of intervention and control groups by assigning an unspecified title (for example, groups 1 and 3). 3 Covid-19. Intervention 1: Intervention group: In addition to applying the routine approaches of the inpatient ward, 5 cc of Echinasea syrup, which is a herbal medicine made by Kimia Daroo factory affiliated to Astan Quds Razavi, will be used three times a day for 3 days in the hospital. Intervention 2: Control group: this group receives treatment and care based on routine ward protocols. 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.