COVID-19 Clinical Trial
Official title:
Effect of Antiseptic Mouthwash/Gargling Solutions and Pre-procedural Rinse on SARS-CoV-2 Load (COVID-19)
In this pilot trial, 150 confirmed COVID-19 individuals will be randomly assigned to 1 of 5 groups: distilled water, CloSYS Ultra Sensitive Rinse (Rowpar Pharmaceutical Inc., USA), Oral-B Mouth Sore (Oral-B, USA), Crest Pro-Health Multi-Protection (Crest, USA), or Listerine Zero (Johnson and Johnson, USA). Study participants will be asked to rinse/gargle with 10-20ml (according to the rinse instructions) of the assigned solutions 4 times per day, for 30-60 seconds, for 4 weeks.
SARS-CoV-2, the virus causing COVID-19, has affected vulnerable individuals, especially those with comorbidities, and high exposure health care workers (HCWs). Typically, the virus first colonizes in the upper respiratory tract (URT) causing clinical symptoms such as coughing, sore throat, and then is transferred to the lower respiratory tract (LRT) which can lead to severe pneumonia, acute respiratory distress syndrome (ARDS), sepsis, and death, if it is not managed. The World Health Organization (WHO) has presented comprehensive guidelines underscoring personal hygiene measures including respiratory hygiene against SARS, MERS, influenza, and now SARS-CoV-2 / COVID-19. While personal protection equipment (PPE), personal hygiene measures, environmental infection control, and physical distancing are crucial in mitigating disease transmission, respiratory hygiene measures do not prevent SARS-CoV-2 colonization in URTs and LRTs of infected individuals (symptomatic and asymptomatic). Experimental and clinical research studies on infections similar to COVID-19 such as SARS, MERS, and H5N1 have shown that using antiseptic mouthwash/gargling solutions, such as products containing chlorhexidine gluconate (CHG), polyvinylpyrrolidone iodine (PVP-I), chlorine dioxide (ClO2), cetylpyridinium chloride (CPC), and hydrogen peroxide (H2O2) can reduce viral load. A randomized controlled trial (N=387) showed efficacy and cost-effectiveness of gargling with water or a product containing PVP-I (3X/day, 20 seconds) on URTIs in healthy volunteers (18-65 years) over 60 days from a societal perspective; in vitro studies have shown that CloSYS, an over the counter mouthwash containing ClO2, was effective on inactivating SARS-CoV as well as disinfecting dental unit waterlines, and biofilm control in ultrasonic dental scaling units. A recent study has shown that CloSYS Ultra Sensitive Oral Rinse reduced the viral load of SARS CoV 2, SARS CoV, and Influenza A H3N2 to a varying extent. The data show that the viral load reduction of SARS CoV 2 by Ultra Sensitive rinse was 10 fold more than the reduction of SARS CoV in 30s. Recently, the US Centers for Disease Control (CDC) and the American Dental Association (ADA) have recommended using a mouthwash containing 1.0-1.5% H2O2 as a pre-procedural rinse before dental treatment to potentially reduce SARS-CoV-2 load; however, no in vivo clinical studies have been conducted to support this claim. The aim of this pilot trial is to evaluate the effect of four over-the-counter antiseptic mouthwash/gargling solutions compared to a control (distilled water) to reduce SARS-CoV-2 load. In addition, study participants will be assessed for the severity of their clinical symptoms during the study period. The 4-week protocol was selected as studies have shown that patients can continue to shed the virus and potentially transmit it to the others for a 2 to 4 week period. An interim analysis is planned when 10 participants per arm (50 total) complete the study using the alpha-spending function with O'Brien-Fleming boundary rule. ;
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