Drugs / ibuzatrelvir
last change Jun 2026 re-read 9 days ago

ibuzatrelvir

also known as PF-07817883

Small molecule

Developed for
COVID-19
Investigated by
Pfizer

Trials 12

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 19 trials
Phase 1 NCT07552779 Apr → Jun 2026 overdue COVID-19, pneumonia Pfizer Active not recruiting No outcome recorded
Phase 1 NCT07235137 Oct → Nov 2025 — Pfizer Completed No outcome recorded
Phase 1 NCT06693518 Nov 2024 → Jan 2025 COVID-19 Pfizer Completed No outcome recorded
Phase 1 NCT06646042 Oct 2024 → Jan 2025 — Pfizer Completed No outcome recorded
Phase 1 NCT06586216 Sep 2024 → Feb 2025 COVID-19 Pfizer Completed No outcome recorded
Phase 1 NCT06122194 Nov 2023 → Jan 2024 — Pfizer Completed No outcome recorded
Phase 1 NCT05884554 Jun 2023 → Jun 2024 COVID-19 Pfizer Completed No outcome recorded
Phase 1 NCT05822440 Apr → Jul 2023 — Pfizer Completed No outcome recorded
Phase 1 NCT05580003 Oct 2022 → Sep 2023 — Pfizer Completed No outcome recorded
Phase 21 trial · 1 met primary
Phase 2 NCT05799495 May → Sep 2023 COVID-19 Pfizer Completed Met primary
Phase 32 trials
Phase 3 NCT07013474 Jul 2025 → Sep 2027 expected COVID-19 Pfizer Recruiting No outcome recorded
Phase 3 NCT06679140 Dec 2024 → Oct 2027 expected COVID-19 Pfizer Recruiting No outcome recorded

News releases announcing trial results or a regulatory action · 1

DateIssuerRelease
2025-10-13 Pfizer Results Pfizer to Highlight Advancements in Respiratory Health and Infectious Disease Research at IDWeek 2025 pfizer.com ↗
Ibuzatrelvir Potently Reduced Viral RNA Levels Despite the High Rate of Anti-S Seropositivity: a Post Hoc Analysis of Serology in the Phase 2b Study in Adults Without Risk Factors for Severe COVID-19

All press releases naming this drug 1 release

DateIssuerRelease

Evidence & citations 5 cited values

Every value below carries the sentence it was read from. 15 sources stand behind the page.

FieldValueCited text
Known as ibuzatrelvir “Ibuzatrelvir is an orally bioavailable SARS-CoV-2 Mpro inhibitor with demonstrated in vitro antiviral activity and low potential for safety concerns, including drug-drug interactions.” PMID 39486089 ↗ Mar 2025
6

“Ibuzatrelvir 600 mg + Dabigatran Etexilate 150 mg” NCT06693518 ↗

NCT07235137 ↗

NCT07552779 ↗

NCT07013474 ↗

NCT06679140 ↗

NCT06646042 ↗

Known as PF-07817883 ClinicalTrials.gov intervention name — accepted as the source's own label NCT05799495 ↗
5

NCT06586216 ↗

NCT05580003 ↗

NCT06122194 ↗

NCT05822440 ↗

NCT05884554 ↗

Action Inhibit “SARS-CoV-2 Mpro inhibitor” PMID 41796210 ↗ Mar 2026
Modality Small molecule — CHEMBL5591580 ↗
Route Oral “Participants will take PF-07817883 by mouth up to 2 times a day.” NCT05580003 ↗