Details from research paper21 Feb 2022 21:57
For those willing to take the time to decipher it....!
"Although a subset of mouthwashes were effective in vitro, it was important to determine their effectiveness in vivo, where virus is being shed continually in the oropharynx. A randomised clinical trial was undertaken to measure the antiviral efficacy of mouthwashes following a 30 second rinse. 78 hospital in-patients with PCR-diagnosed COVID 19 were recruited, following invitation of over 400 to participate. Despite a positive PCR test in the preceding 14 days, only 27/78 patients had live SARS-CoV2 present in their baseline saliva. Recent studies show that live virus is almost never detected beyond 9 days post-symptom onset in immunocompetent patients (44). As our patients were ill enough to be admitted to hospital, many were likely beyond this timepoint. Unfortunately, this was not known at the time sample collection was initiated and only became evident towards the end, with the study terminated at 6 months. By then, new UK daily cases had decreased from 55,892 (31st Dec 2020) to 4,052 (31st March 2021), hospitalised patient numbers were declining and co-morbidity and ventilatory support in these patients rendered them ineligible for randomisation (https://coronavirus.data.gov.uk), making further recruitment impossible. Amongst patients with live virus, saliva was collected before rinsing (baseline), and at 1-, 15-, 30-, and 60-minutes post-rinsing, with mouthwashes containing either containing CPC/IPM (Dentyl Dual Action, n = 8), CPC/benzoate (SCD Ultra, n = 7), PVP-I (Videne, n = 6) or 0.9% w/v NaCl (Normasol, n = 6). Data is shown as both log2-fold reduction from baseline (Figure 5 D) and as individual patient data (Figure 6). Across the entire cohort, baseline salivary viral load varied widely, from 120 PFU/ml to 2.8 × 107 PFU/mL (Supplementary Data1.xls). All four mouthwashes reduced salivary viral load 1-minute post-rinsing, with the smallest reduction being from Normasol® (median 3.9 log2 fold reduction from baseline) and the largest Dentyl Dual Action where 6/7 patients recorded no live virus (median 14.3 log2 reduction from baseline) (Figure 5 D, Tables 3,4). The persistence of the effects varied with rinse. No significant reduction in salivary viral load was seen with Videne at any of the time-points, while for Normasol® a significant reduction was apparent only at 60 minutes. For SCD Ultra, a significant reduction in viral load was seen at 1 minute only (median 8.9 log2 reduction from baseline, Figure 5 D). Dentyl Dual Action was the only product to demonstrate a persistent effect, with a significant reduction evident throughout at 1, 15, 30 and 60 minutes respectively (medians 14.3, 11, 8.8, 9, log2 reduction from baseline). Impressively, in 3/8 patients treated with Dentyl Dual Action, no live virus was recovered at any timepoint after the initial rinse (Figure 6)."
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