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Copmarison of ensitrelvir and nirmatrelvir/ritonavir

Efficacy of ensitrelvir and nirmatrelvir/ritonavir for COVID-19

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT1031230005
Enrollment
360
Registered
2023-04-03
Start date
2023-04-03
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19 COVID-19

Interventions

COVID-19 patients are randomly assigned (1:1) to either ensitrelvir or nirmatrelvir/ritonavir. Efficacy of the two medications are assessed.

Sponsors

Yoshimura Yukihiro
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1.18 years old or more 2.Antigen or PCR test positive for SARS-CoV-2 3.0-3 days after symptom onset 4.Having risk factors of severe COVID-19 5.Written informed consent is obtained

Exclusion criteria

Exclusion criteria: 1.Severe adverse events by ensitrelvir or nirmatrelvir/ritonavir 2.Severe kidney failure (eGFR < 30 mL/min) 3.Taking contraindicated medications with ensitrelvir or nirmatrelvir/ritonavir 4.Regarded as inappropriate by study investigators

Design outcomes

Primary

MeasureTime frame
five symptoms 5 or 6 days after starting medications

Secondary

MeasureTime frame
# 5 symptoms 28 to 30 days after starting medications # viral antigen titer 5 or 6 days after starting medications # unplanned visit of medical facilities or death # adverse events

Contacts

Public ContactYukihiro Yoshimura

Yokohama Municipal Citizen's Hospital

yymole@gmail.com+81-45-316-4580

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026