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C5091018 - An Interventional Efficacy And Safety, Phase 3, Randomized, Double-Blind, 3-Arm Study To Investigate Ibuzatrelvir in Adults With Symptomatic COVID-19 Who Are Severely Immunocompromised

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-517671-21-00
Acronym
C5091018
Enrollment
94
Registered
2025-08-11
Start date
2025-09-30
Completion date
Unknown
Last updated
2025-12-08

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

Conditions

Coronavirus Disease 2019 (COVID-19)

Brief summary

Proportion of participants with the composite endpoint of: • COVID-19-related emergency department (ED) visits with administration of supplemental oxygen, COVID-19 antiviral, or intravenous (IV) treatment (eg, hydration, antibiotics, or corticosteroids); COVID-19-related hospitalization; or all-cause mortality by Day 38, or • Evidence of recurrent or persistent SARS-CoV-2 infection, [CCI]

Detailed description

Time to sustained alleviation of all targeted COVID-19 symptoms through Day 38., Proportion of participants with no [CCI], Proportion of participants with evidence of recurrent or persistent SARS-CoV-2 infection, [CCI], Proportion of participants with COVID-19-related ED visits with administration of supplemental oxygen, COVID-19 antiviral, or IV treatment (eg, hydration, antibiotics, or corticosteroids), COVID-19-related hospitalization, or all-cause mortality through Day 38., Change from baseline in SARS-CoV-2 RNA level in NP or nasal swabs over time., Proportion of participants with SARS-CoV-2 NP or nasal RNA< LLOQ at each time point through Day 38., Proportion of participants with viral rebound in SARS-CoV-2 RNA level in NP or nasal swabs through Day 38 visit (in both virologic responders and regardless of virologic response)., Time to sustained NP or nasal swab SARS-CoV-2 RNA< LLOQ through Day 38., Incidence of treatment-emergent adverse events (TEAEs)., Incidence of serious adverse events (SAEs) and adverse events (AEs) leading to discontinuations.

Interventions

DRUGPlacebo to Remdesivir - Saline
DRUGPlacebo to Ibuzatrelvir
DRUGRemdesivir

Sponsors

Pfizer Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Proportion of participants with the composite endpoint of: • COVID-19-related emergency department (ED) visits with administration of supplemental oxygen, COVID-19 antiviral, or intravenous (IV) treatment (eg, hydration, antibiotics, or corticosteroids); COVID-19-related hospitalization; or all-cause mortality by Day 38, or • Evidence of recurrent or persistent SARS-CoV-2 infection, [CCI]

Secondary

MeasureTime frame
Time to sustained alleviation of all targeted COVID-19 symptoms through Day 38., Proportion of participants with no [CCI], Proportion of participants with evidence of recurrent or persistent SARS-CoV-2 infection, [CCI], Proportion of participants with COVID-19-related ED visits with administration of supplemental oxygen, COVID-19 antiviral, or IV treatment (eg, hydration, antibiotics, or corticosteroids), COVID-19-related hospitalization, or all-cause mortality through Day 38., Change from baseline in SARS-CoV-2 RNA level in NP or nasal swabs over time., Proportion of participants with SARS-CoV-2 NP or nasal RNA< LLOQ at each time point through Day 38., Proportion of participants with viral rebound in SARS-CoV-2 RNA level in NP or nasal swabs through Day 38 visit (in both virologic responders and regardless of virologic response)., Time to sustained NP or nasal swab SARS-CoV-2 RNA< LLOQ through Day 38., Incidence of treatment-emergent adverse events (TEAEs)., Incidence of serious adver

Countries

Belgium, Denmark, France, Germany, Greece, Netherlands, Slovakia, Spain, Sweden

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026