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ibuzatrelvir

Phase 3

COVID-19 Infection | Small molecule | Infectious Disease |Pfizer, Inc.|Last Updated: Jun 5, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment300
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07013474A Study to Learn About the Study Medicine Ibuzatrelvir in Adults With COVID-19 Who Are Severely ImmunocompromisedPHASE3 RECRUITING 300Jul 14, 2025Feb 25, 2028Jun 5, 2026141 United States, Argentina +16
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Study Endpoints
Primary Endpoints
The difference in the proportion of patients meeting the primary composite endpoint, between ibuzatrelvir and remdesivir vs remdesivir groups in symptomatic adult participants with COVID-19 who are severely immunocompromised
38 days

The difference in the proportion of participants with the composite endpoint of a) COVID-19-related ED visits with administration of supplemental oxygen, COVID-19 antiviral, or IV treatment; COVID-19-related hospitalization; or all-cause mortality, and b) Evidence of recurrent or persistent SARS-CoV-2 infection

Secondary Endpoints
Time to sustained alleviation of all targeted COVID-19 symptoms
38 days
Proportion of participants with evidence of recurrent or persistent SARS-CoV-2 infection.
38 days
Proportion of participants with COVID-19-related ED visits with administration of supplemental oxygen, COVID-19 antiviral, or IV treatment, COVID-19-related hospitalization, or all-cause mortality.
38 days
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Study Design & Arms
AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
IbuzatrelvirEXPERIMENTALParticipants will receive ibuzatrelvir orally twice a day + IV placebo for remdesivir
Ibuzatrelvir + RemdesivirEXPERIMENTALParticipants will receive ibuzatrelvir orally twice a day + IV remdesivir
RemdesivirEXPERIMENTALParticipants will receive placebo for ibuzatrelvir orally twice a day + IV remdesivir
Interventions
NameTypeDescription
ibuzatrelvirDRUGtablet
remdesivirDRUGinjection, for intravenous use
placebo for ibuzatrelvirDRUGtablet
placebo for remdesivirDRUGinjection, for intravenous use
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites141

Inclusion Criteria: 1. 18 years of age or older at screening who are non-hospitalized or hospitalized for observation or with the intent of administering the study intervention. 2. Confirmed SARS-CoV-2 infection as determined by RAT (or other locally approved test) collected within 2 days prior to ...

Countries:United StatesArgentinaBelgiumBrazilDenmarkFranceGermanyGreeceJapanMexicoNetherlandsPuerto RicoSlovakiaSouth KoreaSpainSwedenTaiwanTurkey (Türkiye)
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Recent Changes (Last 90 Days)
LOWJun 5, 2026NCT07013474lastUpdatePostDate: changed
LOWJun 5, 2026NCT07013474lastUpdatePostDate: changed
LOWJun 5, 2026NCT07013474lastUpdatePostDate: changed
LOWJun 5, 2026NCT07013474lastUpdatePostDate: changed
MEDIUMMay 29, 2026NCT07013474primaryCompletionDate: changed
MEDIUMMay 29, 2026NCT07013474primaryCompletionDate: changed
MEDIUMMay 29, 2026NCT07013474primaryCompletionDate: changed
LOWMay 26, 2026NCT07013474primaryCompletionDate: changed
LOWMay 24, 2026NCT07013474studyFirstPostDate: changed