Drugs / sisunatovir
last change Feb 2026 re-read 2 minutes ago

sisunatovir

Small molecule

Developed for
respiratory syncytial virus infectious disease
Investigated by
Pfizer

Trials 15 · a red edge is where a trial was stopped

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 111 trials
Phase 1 NCT06102174 Feb → Sep 2024 respiratory syncytial virus infectious disease Pfizer Terminated No outcome recorded
Phase 1 NCT05987072 Nov → Dec 2023 respiratory syncytial virus infectious disease Pfizer Completed No outcome recorded
Phase 1 NCT06105983 Nov 2023 → Jul 2024 Pfizer Completed No outcome recorded
Phase 1 NCT06037031 Oct 2023 → Jul 2024 impaired renal function disease Pfizer Completed No outcome recorded
Phase 1 NCT05994963 Sep 2023 → Feb 2024 Pfizer Completed No outcome recorded
Phase 1 NCT05857644 Jun 2023 → Feb 2024 liver disorder Pfizer Completed No outcome recorded
Phase 1 NCT05878522 May → Oct 2023 Pfizer Completed No outcome recorded
Phase 1 NCT05712460 Feb → Apr 2023 respiratory syncytial virus infectious disease Pfizer Completed No outcome recorded
Phase 1 NCT05873764 May → Jul 2022 respiratory syncytial virus infectious disease Pfizer Completed No outcome recorded
Phase 1 NCT04065698 Aug → Sep 2019 respiratory syncytial virus infectious disease Pfizer Completed No outcome recorded
Phase 23 trials
Phase 2 NCT04267822 Jun 2020 → Jun 2023 disease related to hematopoietic stem cell transplant, respiratory syncytial virus infectious disease Pfizer Withdrawn No outcome recorded
Phase 2 NCT04225897 Nov 2019 → Dec 2022 respiratory syncytial virus infectious disease Pfizer Terminated No outcome recorded
Phase 2 NCT03258502 Jul → Oct 2017 respiratory syncytial virus infectious disease Pfizer Completed No outcome recorded
Phase 2/31 trial
Phase 2/3 NCT06079320 Dec 2023 → Sep 2024 respiratory syncytial virus infectious disease Pfizer Terminated No outcome recorded

Evidence & citations 9 cited values

Every value below carries the sentence it was read from. 17 sources stand behind the page.

FieldValueCited text
Known as sisunatovir “The purpose of the study is to learn about the safety, pharmacokinetics and antiviral activity of the study medicine (called sisunatovir/RV521) for the potential treatment of...” NCT03258502
8

Sisunatovir is an investigational respiratory syncytial virus (RSV) antiviral that was effective in an adult human viral challenge study.” PMID 41673909 Feb 2026

“study medicine (sisunatovir)” NCT05873764

NCT05712460

NCT05994963

NCT05878522

NCT05987072

NCT06079320

NCT06105983

Known as PF-07923568 ClinicalTrials.gov intervention name — accepted as the source's own label NCT06037031
1

NCT05857644

Known as RV-521 HYDROCHLORIDE ChEMBL registry synonym — accepted as the source's own label CHEMBL4297497
Known as RV521 ClinicalTrials.gov intervention name — accepted as the source's own label NCT04065698
4

NCT03782662

NCT04267822

NCT03258502

NCT04225897

Known as RV521.HCl ChEMBL registry synonym — accepted as the source's own label CHEMBL4297497
Known as SISUNATOVIR HYDROCHLORIDE ChEMBL registry synonym — accepted as the source's own label CHEMBL4297497
Action Inhibit “RV521, a small-molecule antiviral inhibitor of the RSV-F protein” PMID 31712214 Jan 2020
Modality Small molecule “RV521, a small-molecule antiviral inhibitor of the RSV-F protein” PMID 31712214 Jan 2020
1

CHEMBL4297497

Route Oral “RV521 drug substance in capsule for oral administration” NCT03258502