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COVID-19 Prophylactic Effect of Bromhexine Hydrochloride

Mitev et al., Preprints.org, doi:10.20944/preprints202410.1998.v1
Oct 2024  
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Retrospective 125 outpatients showing reduced COVID-19 infection rates with prophylactic bromhexine hydrochloride (BRH) use during 2021-2022 COVID waves in Bulgaria. Prior to BRH prophylaxis, 62% of participants reported confirmed COVID-19 diagnoses, which decreased to 11% after BRH initiation (p<0.0001). The protective effect was more pronounced with longer duration of prophylactic use - patients taking BRH for >30 days had significantly lower reinfection rates (3%) compared to those taking it for ≤10 days (33%). Reliance on patient-reported outcomes, potential recall bias, lack of control for social contact levels, and lack of a concurrent control group limit conclusions.
Bromhexine efficacy may vary depending on the degree of TMPRSS-dependent fusion for different variants1,2.
Mitev et al., 25 Oct 2024, retrospective, Bulgaria, preprint, 5 authors.
This PaperBromhexineAll
COVID-19 Prophylactic Effect of Bromhexine Hydrochloride
Vanyo Mitev, Tsanko Mondeshki, Ani Miteva, Konstantin Tashkov, Violeta Dimitrova
doi:10.20944/preprints202410.1998.v1
Despite the enormous efforts and funds spent to find an effective treatment for COVID-19, the results have been disappointing. In previous publications, we have demonstrated the remarkable effect of high-dose colchicine in inhibiting the cytokine storm and preventing multiorgan damage and death. However, this treatment is beneficial only after virus entry into the cell. The question of prophylaxis and entry prohibition should also be explored. We now demonstrate the prophylactic effect of bromhexine hydrochloride (BRH), an over-the-counter, noninvasive, effective, well-tolerated medicine, with proven safety, affordable, and inexpensive on 125 men and women. The effect of BRH is best when given continuously for prophylaxis during peaks in contagion in the wave of COVID-19. Then the probability of infection drops sharply, and if a disease does occur, it proceeds mildly. BRH is also effective when given by inhalation for postexposure prophylaxis. When COVID-19 manifests itself clinically, the efficacy of BRH drops sharply because the virus is already in the cell. However, BRH inhalations are useful because they limit the spread of the virus and have an anti-inflammatory and possibly antiviral effect.
Supplementary Materials: The following supporting information can be downloaded at: Preprints.org.
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