Skip to content

A Study to Learn About the Study Medicine Sisunatovir in Adults With Respiratory Syncytial Virus (RSV) Infection

AN INTERVENTIONAL PHASE 2/3, ADAPTIVE, MULTI-CENTER, RANDOMIZED, DOUBLE-BLIND STUDY TO INVESTIGATE EFFICACY AND SAFETY OF ORAL SISUNATOVIR COMPARED WITH PLACEBO IN NONHOSPITALIZED SYMPTOMATIC ADULTS WITH RESPIRATORY SYNCYTIAL VIRUS INFECTION WHO ARE AT RISK OF PROGRESSION TO SEVERE ILLNESS

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031230632
Enrollment
2715
Registered
2024-02-14
Start date
2024-03-13
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

Respiratory Syncytial Virus Infection

Interventions

Drug: Sisunatovir Participants will receive tablets from Day 1 to Day 5 Drug: Placebo Participants will receive matching placebo tablets from Day 1 to Day 5

Sponsors

Kawai Norisuke
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Inclusion Criteria: *Participants aged 18 years or older at screening. *Diagnosis of RSV infection collected within 5 days prior to randomization. *New onset or worsening (if present chronically) of at least one of the following signs and/or symptoms consistent with a viral acute respiratory infection (ARI), within 5 days prior to randomization: nasal congestion, nasal discharge, sore throat, cough, sputum production, shortness of breath, or wheezing. *Has at least 1 of the following characteristics or underlying medical conditions: a) 65 years of age or older b) Chronic lung disease, c) Heart failure, d) Immunosuppressive disease/condition or immune-weakening medications

Exclusion criteria

Exclusion criteria: Exclusion Criteria: *Any medical or psychiatric condition that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study or interfere with the evaluation of response to the study intervention. *Diagnosis of viral respiratory infections other than RSV including influenza and SARS-CoV-2 *Current need for hospitalization or anticipated need for hospitalization for any reason to provide inpatient/acute care within 24 hours after randomization *Known history or has risk factors for QT prolongation or Torsades de Pointes or congenital deafness, family history of long QT syndrome or unexplained sudden death, or a standard 12-lead ECG with QTcF >=450 ms *Has hypersensitivity to or other contraindication to any of the components of the study interventions, as determined by the investigator.

Design outcomes

Primary

MeasureTime frame
Primary Outcome Measures : 1.Proportion of participants with Respiratory Syncytial Virus (RSV)-related hospitalization or death from any cause through Day 28, among patients treated <=3 days after RSV symptom onset [ Time Frame: 28 days ]

Secondary

MeasureTime frame
Secondary Outcome Measures : 1.Proportion of participants with RSV-related hospitalization or death from any cause through Day 28. [ Time Frame: 10 days and 28 days ] 2.Proportion of participants with Respiratory Syncytial Virus (RSV)-related visits or death from any cause through Day 28. [ Time Frame: 28 days ] 3.Proportion of participants with progression, development or resolution of Lower Respiratory Tract Infection (LRTI) through Day 10 [ Time Frame: 10 days ]

Countries

Argentina, Australia, Canada, China, India, Japan, South Africa, Taiwan, United States

Contacts

Public ContactClinical Trials Information Desk

Pfizer R&D Japan G.K.

clinical-trials@pfizer.com+81-3-5309-7000

Outcome results

None listed

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