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All Studies   All Outcomes    Recent:   

Real-World Efficacy of Ensitrelvir in Hospitalized Patients With COVID-19 in Japan: A Retrospective Observational Study

Yoshida et al., Cureus, doi:10.7759/cureus.61048 (date from preprint)
Feb 2024  
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Retrospective 154 hospitalized COVID-19 patients in Japan showing faster viral clearance and shorter hospitalization with ensitrelvir treatment compared to remdesivir or molnupiravir. There was no significant difference for fever resolution time.
Potential risks include the creation of dangerous variants, and mutagenicity, carcinogenicity, teratogenicity, and embryotoxicity1-10. Multiple analyses have identified variants potentially created by molnupiravir11-14.
Study covers ensitrelvir, remdesivir, and molnupiravir.
Yoshida et al., 6 Feb 2024, retrospective, Japan, peer-reviewed, 3 authors, study period 1 July, 2022 - 15 September, 2023. Contact: yryohei@asahikawa-med.ac.jp.
This PaperMolnupiravirAll
Real-World Efficacy of Ensitrelvir in Hospitalized Patients With COVID-19 in Japan: A Retrospective Observational Study
Ryohei Yoshida, Takaaki Sasaki, Yoshinobu Ohsaki
Cureus, doi:10.7759/cureus.61048
Background and aim: The coronavirus disease 2019 (COVID-19) pandemic necessitates continuously evaluating antiviral treatments, especially for high-risk groups, including older individuals. This study aimed to compare the efficacy of three antiviral drugs, including remdesivir, molnupiravir, and ensitrelvir, in hospitalized patients as measured by our own institution's antigen test, focusing on outcomes, such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigen levels, hospitalization duration, and fever resolution. Methods: This retrospective observational study was conducted at Yoshida Hospital, Asahikawa City, Japan, enrolling 154 patients who received antiviral treatment upon COVID-19 diagnosis from July 1, 2022, to September 15, 2023. The diagnosis was confirmed by proprietary antigen tests or loop-mediated isothermal amplification assays. Patients who received treatment outside the hospital or with consistently negative antigen results were excluded. Drug administration was determined by attending physicians, considering oral administration challenges and renal dysfunction. The data were statistically analyzed using an unpaired two-tailed Student's t-test and one-way analysis of variance complemented by the Tukey post-hoc test for detailed group comparisons. Results: No significant differences were observed in the initial antigen levels among the treatment groups. By day 10, the ensitrelvir group showed lower antigen levels than the other groups, but not significantly. The ensitrelvir group had a higher antigen-negative conversion rate and a significantly shorter hospital stay than the molnupiravir group. However, no significant differences were noted in the fever resolution time among the groups. Conclusion: This study suggests the potential benefits of ensitrelvir in reducing antigen levels and hospitalization duration. However, the overall efficacy of the antiviral agents for symptomatic relief appears similar. These findings underscore the need for further research to optimize COVID-19 management by considering personalized treatment approaches and long-term outcomes.
Additional Information Author Contributions All authors have reviewed the final version to be published and agreed to be accountable for all aspects of the work. Concept and design: Ryohei Yoshida, Yoshinobu Ohsaki Drafting of the manuscript: Ryohei Yoshida Acquisition, analysis, or interpretation of data: Takaaki Sasaki Critical review of the manuscript for important intellectual content: Takaaki Sasaki, Yoshinobu Ohsaki Supervision: Takaaki Sasaki, Yoshinobu Ohsaki Disclosures Human subjects: Consent was obtained or waived by all participants in this study. The Institutional Review Board of Yoshida Hospital issued approval 20230809003. The study protocol was approved by the Institutional Review Board of Yoshida Hospital (approval no. 20230809003) and conducted in accordance with the principles of the Declaration of Helsinki. Informed consent was obtained from all study patients using the opt-out method. Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other..
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Late treatment
is less effective
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