Abstract

Background. Due to the lack of specific safe medications for the treatment of COVID-19, medications used for other similar conditions are being tested to alleviate the condition of COVID-19 patients, resulting in acceptable outcomes in some cases. Umifenovir (Arbidol®) is used to treat influenza viruses by inhibiting the fusion of the virus with the host cell. According to previous findings, umifenovir may inhibit SARS-CoV-2 infection by interfering with the release of SARS-CoV-2 from inside the cell. This study aimed to determine the effects of umifenovir, a fusion inhibitor, versus lopinavir/ritonavir in treating patients with COVID-19. Methods. This study was a randomized controlled trial consisting of 90 confirmed COVID-19 patients divided into the lopinavir/ritonavir group and the umifenovir group. The lopinavir/ritonavir group received 100/25 mg twice, while the umifenovir group was given 200 mg thrice a day, in both groups, for seven days. Outcomes included mortality rate and the need for mechanical ventilation or intensive care unit admission. Length of stay in the hospital and ICU and the lab tests trend were also assessed. Results. The mortality rate and the need for admission to the ICU were significantly lower in the umifenovir group (8% vs. 27.5%; P-value = 0.02). Moreover, The levels of white blood cells were also lower in the umifenovir group than in the control group by day 10 (6.2 (5.3-7.4) vs. 10.8 (9.9-13); P-value <0.001). Conclusions. Umifenovir may reduce the need for admission to the ICU and mortality rate in patients with COVID-19 compared with lopinavir/ritonavir. The lab test trends were also in favor of umifenovir use.

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