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

Stopped early · Phase 2/Phase 3 · Has a placebo group

Conditions studied: Respiratory Syncytial Virus Infection

In brief

The purpose of this study is to learn about the safety and effects of sisunatovir. Sisunatovir is studied for the possible treatment of Respiratory Syncytial Virus (RSV). RSV is a virus that causes lung infections with cold-like symptoms, but it can cause severe illness in some people. Sisunatovir is studied in adults: * who are not admitted to the hospital and * who have high chances of having a severe illness from RSV infection. This study is seeking participants who: * Are confirmed to have RSV. * Have symptoms of a lung infection. * Are 18 years of age or older. * Have one or more of the following which increases the chances of RSV illness: * A long-term lung disease. * heart failure. * a condition that weakens the immune system. * Are 65 years of age or older and do not have any of the conditions above Half of the participants in this study will receive sisunatovir. The other half will receive a placebo for 5 days. Placebo looks same like the study medicine but does not have any medication. Both sisunatovir and placebo will be taken by mouth. The study will compare the experiences of people receiving sisunatovir to those of the people who do not. This will help decide if sisunatovir is safe and effective. Participants will attend about 8-10 study visits over 5 weeks. During this time, they will have: * visits at the study clinic, * blood work, * swabs of the nose, * questionnaires, * a follow-up phone call.

Key facts

Study ID: NCT06079320
Run by: Pfizer
People needed: 16
Starts: 2023-12-08
Expected to finish: 2024-09-30
Last updated by the study team: 2025-11-10

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

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

You may not qualify if…

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
Any clinically significant ECG abnormality in the pre-dose ECG that, per investigator judgement, may affect participant safety
Has hypersensitivity to or other contraindication to any of the components of the study interventions, as determined by the investigator.

Where it is running

National Institute of Clinical Research — Garden Grove, California, United States
National Institute of Clinical Research — Westminster, California, United States
De La Cruz Research Center, LLC — Miami, Florida, United States
Adult Medicine of Lake County, Inc. — Mt. Dora, Florida, United States
Adult Medicine of Lake County — Mt. Dora, Florida, United States
Accellacare - DuPage — Oak Lawn, Illinois, United States
Mercury Street Medical Group, PLLC — Butte, Montana, United States
DM Clinical Research - AOM — Brooklyn, New York, United States
CHEAR Center LLC — The Bronx, New York, United States
Preferred Primary Care Physicians, Preferred Clinical Research (Ofc 18) — Pittsburgh, Pennsylvania, United States
Zenos Clinical Research — Dallas, Texas, United States
Biopharma Informatic, LLC — Houston, Texas, United States
Salma Mazhar, MD PA — Mesquite, Texas, United States
SMS Clinical Research — Mesquite, Texas, United States
Shanghai Minhang District Central Hospital — Shanghai, China
Maharaja Agrasen Superspeciality Hospital — Jaipur, Rajasthan, India
Koukankai Koukan Clinic — Kawasaki-Shi, Kanagawa, Japan
National Hospital Organization Minami Kyoto Hospital — Jōyō, Kyoto, Japan
Nanbu Tokushukai Hospital — Shimajiri, Okinawa, Japan

Full record on ClinicalTrials.gov

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