IRCT20201127049507N1 IRCT 2021-08-22 Ghoum University of Medical Sciences The efficacy of eucalyptus essence inhalation in hospitalized patients with COVID-19 Evaluation of the efficacy of eucalyptus essence inhalation in hospitalized patients with COVID-19: a clinical trial study 2021-09-01 anticipated 40 Complete https://irct.ir/trial/56960 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: patients will be allocated into two groups using apermuted balanced block randomization method with the size of blocks 4 and 6 . random sequence will be generated by an epidemiologist by running an online program in sealed envelope website(https://www.sealedenvelope.com) . concealment is also guaranteed due to the use of specific codes that are obtained by the website. 3 COVID -19 disease. Intervention 1: Intervention group: The intervention group will receive routine ward care as well as 2cc essence of Eucalyptus, that will be prepared in the Jihad Agricultural Unit of University of Tehran, after being diluted with 3cc of distilled water to a concentration of 0.125%, delivered via a nebulizer mask, every 12 hours per day for a duration of 10 minutes, that is,10 times in 5 days at times, not coinciding with the time of other medications. Arterial blood saturation and all other parameters will be measured and recorded, before and after the intervention, by monitoring device, pulse oximetry and thermometer. Relevant blood investigations carried out during routine hospital workup, will also be recorded from the patient’s file. Intervention 2: Control group: Receive routine hospital care and do not receive extra intervention. 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 It depends on the circumstances