Antiviral effect of cetylpyridinium chloride in mouthwash on SARS-CoV-2

Ryo Takeda, Hirofumi Sawa, Michihito Sasaki, Yasuko Orba, Nako Maishi, Takuya Tsumita, Natsumi Ushijima, Yasuhiro Hida, Hidehiko Sano, Yoshimasa Kitagawa, Kyoko Hida

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17 Citations (Scopus)


Cetylpyridinium chloride (CPC), a quaternary ammonium compound, which is present in mouthwash, is effective against bacteria, fungi, and enveloped viruses. This study was conducted to explore the antiviral effect of CPC on SARS-CoV-2. There are few reports on the effect of CPC against wild-type SARS-CoV-2 at low concentrations such as 0.001%–0.005% (10–50 µg/mL). Interestingly, we found that low concentrations of CPC suppressed the infectivity of human isolated SARS-CoV-2 strains (Wuhan, Alpha, Beta, and Gamma) even in saliva. Furthermore, we demonstrated that CPC shows anti-SARS-CoV-2 effects without disrupting the virus envelope, using sucrose density analysis and electron microscopic examination. In conclusion, this study provided experimental evidence that CPC may inhibit SARS-CoV-2 infection even at lower concentrations.

Original languageEnglish
Article number14050
JournalScientific reports
Issue number1
Publication statusPublished - 12-2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General


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