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Virucidal effect of povidone iodine on COVID-19 in the nasopharynx: A structured summary of a study protocol for an open-label randomized clinical trial
Trials volume 22, Article number: 2 (2021)
General: To assess the virucidal efficacy of povidone iodine (PVP-I) on COVID-19 virus located in the nasopharynx
i. To evaluate the efficacy of povidone iodine (PVP-I) to removeCOVID-19 virus located in the nasopharynx
ii. To assess the adverse events of PVP-I
This is a single-center, open-label randomized clinical trial with a 7-arm parallel-group design.
The study will be conducted at Dhaka Medical College Hospital, Dhaka, Bangladesh.
All RT-PCR-confirmed COVID-19 cases aged between 15-90 years with symptoms for the past 4 days will be screened. Those who give informed consent, are willing to participate, and accept being randomized to any assigned group will also be considered for final inclusion.
Patients with known sensitivity to PVP-I aqueous antiseptic solution or any of its listed excipients or previously diagnosed thyroid disease or who had a history of chronic renal failure: stage ≥3 by estimated glomerular filtration rate (eGFR) Modification of Diet in Renal Disease (MDRD) or had acute renal failure (KDIGO ≥stage 2: creatinine ≥2 times from the baseline) or patients who required invasive or noninvasive ventilation or planned within the next 6 hours were considered for exclusion. Moreover, lactating or pregnant women will also be restricted to include here.
Intervention and comparator
This RCT consist of seven arms:
Arm-1 (intervention group): will receive povidone iodine (PVP-I) nasal irrigation (NI) at a concentration of 0.4%
Arm-2 (intervention group): will receive PVP-I nasal irrigation at a concentration of 0.5%
Arm-3 (intervention group): will receive PVP-I nasal irrigation at a concentration of 0.6%.
Arm-4 (intervention group): will receive PVP-I nasal spray (NS) at a concentration of 0.5%.
Arm-5 (intervention group): will receive PVP-I nasal spray at a concentration of 0.6%.
Arm-6 (placebo comparator group): will receive distilled water through NI
Arm-7 (Placebo comparator group): will receive distilled water through NS
The intervention arms will be compared to the placebo comparator arms. Other supportive and routine care will be the same in both groups.
The primary outcome is the proportion of cases that remain COVID-19 positive following the intervention. It will be assessed from 1 minutes to 15 minutes after the intervention. Any occurrence of adverse effects following the intervention will be documented as a secondary outcome.
The assignment to the study (intervention) or control (comparator) group will be allocated in equal numbers through randomization using random number generation in Microsoft Excel by a statistician who is not involved in the trial. The allocation scheme will be made by an independent statistician using a sealed envelope. The participants will be allocated immediately after the eligibility assessment and consenting procedures.
This is an open-label clinical trial, and no blinding or masking will be performed.
Numbers to be randomized (sample size)
A total of 189 confirmed cases of COVID-19 will be randomized into seven groups. In each arm, a total of 27 participants will be recruited.
The current trial protocol is Version 1.5 from September 10, 2020. Recruitment began September 30, 2020 and is anticipated to be completed, including data analysis by February 28, 2021.
The trial protocol has been registered in the ClinicalTrials.gov on September 16, 2020. NCT Identifier number: NCT04549376.
The full protocol is attached as an additional file, accessible from the Trials website (Additional file 1). In the interest in expediting the dissemination of this material, the familiar formatting has been eliminated; this letter serves as a summary of the key elements of the full protocol.
Availability of data and materials
The corresponding author has access to the final trial information, and the data will be available on reasonable request (contact: email@example.com).
The authors acknowledge significant support from the Pi Research Consultancy Center, Dhaka, Bangladesh (www.pircc.org) during protocol development and overall research activities. The authors would also like to thank all the clinicians, nurses, and medical staff who dedicate their time and effort to help us to conduct the clinical trial during the COVID-19 pandemic. Special thanks to Dr Noor-E-Ambia for language help.
Prof SK Nurul Fattah Rumi, Professor & Head, Dept. of Otorhiniolaryngology & Head Neck Surgery, Dhaka Medical College Hospital, Email: firstname.lastname@example.org
Prof. Sultana Sahana Banu, Professor & Head, Dept. of Virology, Dhaka Medical College, Email: email@example.com
Brig. General Dr. AKM Nasir Uddin, Director, Dhaka Medical College Hospital, Email: firstname.lastname@example.org
Dr. Mostafa Kamal Arefin, Otolaryngologist, Dhaka Medical College Hospital, Email_ email@example.com
The trial received no external funding.
Ethics approval and consent to participate
The RCT protocol was approved by the Ethical Review Committee of Dhaka Medical College (Memo no: ERC-DMC/ECC/2020/93) on 23 May 2020. Each participant will be informed that participation in the trial is voluntary and that s/he is free to withdraw, without justification, from the trial at any time without consequences and without affecting professional responsibilities. Informed consent will seek approval to collect samples and clinical data for the intended purpose of this trial. Informed consent will be ensured before randomization. The study will be conducted in concordance with the current declaration of Helsinki and Good Clinical Practice Guidelines.
Consent for publication
The authors declare that they have no competing interests.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
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Cite this article
Hasan, M.J., Rumi, S.K.N.F., Banu, S.S. et al. Virucidal effect of povidone iodine on COVID-19 in the nasopharynx: A structured summary of a study protocol for an open-label randomized clinical trial. Trials 22, 2 (2021). https://doi.org/10.1186/s13063-020-04963-2
- Randomized clinical trial
- Povidone Iodine
- Nasal spray
- Nasal Irrigation