SUNRISE-3: Efficacy and Safety of Bemnifosbuvir in High-Risk Outpatients With COVID-19

NCT ID: NCT05629962

Last Updated: 2025-06-13

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE3

Total Enrollment

2285 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-11-25

Study Completion Date

2024-05-30

Brief Summary

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The purpose of the study is to evaluate whether bemnifosbuvir (BEM) is effective and safe in adults with COVID-19 who do not need to be in the hospital but who are at high risk for progression to severe disease. Eligible subjects will be randomly assigned (by chance) to receive BEM or matching placebo orally for 5 days. Co-administration of locally available standard of care (SOC) is allowed. The total duration of the study is 60 days.

Detailed Description

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Conditions

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Severe Acute Respiratory Syndrome Coronavirus 2 (SARS CoV 2 Infection) COVID-19

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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Bemnifosbuvir (BEM)

Group Type EXPERIMENTAL

Bemnifosbuvir (BEM)

Intervention Type DRUG

BEM tablets administered orally every 12 hours (twice a day) for a total of 5 days

Placebo

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Placebo tablets administered orally every 12 hours (twice a day) for a total of 5 days

Interventions

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Bemnifosbuvir (BEM)

BEM tablets administered orally every 12 hours (twice a day) for a total of 5 days

Intervention Type DRUG

Placebo

Placebo tablets administered orally every 12 hours (twice a day) for a total of 5 days

Intervention Type DRUG

Other Intervention Names

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AT-527

Eligibility Criteria

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Inclusion Criteria

* Positive SARS-CoV-2 test conducted ≤ 5 days prior to randomization
* Mild or moderate COVID-19 with symptom onset ≤ 5 days before randomization and at least one COVID-19 related symptom present at time of screening
* Subject must be high risk, defined below:

1. Age ≥70 years OR
2. Age ≥55 years with one of the following: i) obesity (body mass index \[BMI\] ≥30 kg/m2) ii) diabetes mellitus iii) cardiovascular disease or hypertension iv) chronic lung disease requiring routine therapy OR
3. Age 50 to 54 years with two of the following: i) obesity (BMI ≥30 kg/m2) ii) diabetes mellitus iii) cardiovascular disease or hypertension iv) chronic lung disease requiring routine therapy OR
4. Age ≥18 years with one of the following: i) Down syndrome, sickle cell disease, dementia, Parkinson's disease, or care home residents ii) One of the following immunocompromising conditions or immunosuppressive treatments: receiving chemotherapy for cancer, hematologic malignancy, being within 2 years of a hematopoietic stem cell transplant, receipt of a solid organ transplant and on immunosuppressive therapy, human immunodeficiency virus (HIV) infection untreated or with CD4+ T lymphocyte count \<350 cells per cubic millimeter, moderate/severe primary immunodeficiency, taking immunosuppressive medications
* Use of adequate contraception for females of childbearing potential

Exclusion Criteria

* Severe or critical COVID-19 illness
* Admitted to a hospital within 90 days prior to randomization due to COVID-19
* Use of other investigational drugs within 30 days prior to planned dosing, or plans to enroll in another clinical trial of an investigational agent while participating in the present study
* Initiation or planned initiation of remdesivir for treatment of the current SARS-CoV-2 infection
* Requirement of prohibited medications, including hydroxychloroquine or amiodarone within 3 months prior to screening. Note: Subjects who had already initiated any COVID-19 drug with antiviral effects intended to treat symptomatic SARS-CoV-2 infection (≥ 24 hours prior to randomization) will be excluded. During screening (or within 24 hours prior to or after randomization), locally available COVID-19 drugs with antiviral effects (including but not limited to nirmatrelvir/ritonavir, molnupiravir, favipiravir, monoclonal antibodies) will be permitted.
* Other known active viral or bacterial infection at the time of screening, such as influenza and respiratory syncytial virus (RSV). Note: This exclusion does not apply to subjects with stable chronic viral infections, such as chronic hepatitis C virus (HCV) or HIV providing other eligibility criteria are met.
* Receiving dialysis or have known severe renal impairment
* History of severe hepatic impairment (Child-Pugh Class C)
* Known allergy or hypersensitivity to components of study drug
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Atea Pharmaceuticals, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Atea Study Site

Kingman, Arizona, United States

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Prescott, Arizona, United States

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Surprise, Arizona, United States

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Tucson, Arizona, United States

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Canoga Park, California, United States

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Fullerton, California, United States

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Inglewood, California, United States

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La Palma, California, United States

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Long Beach, California, United States

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Long Beach, California, United States

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Los Angeles, California, United States

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Sacramento, California, United States

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San Diego, California, United States

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Coral Gables, Florida, United States

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Cutler Bay, Florida, United States

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Doral, Florida, United States

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Hialeah, Florida, United States

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Miami, Florida, United States

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Miami, Florida, United States

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Miami, Florida, United States

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Miami, Florida, United States

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Miami, Florida, United States

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Miami, Florida, United States

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Miami, Florida, United States

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Miami Gardens, Florida, United States

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North Miami Beach, Florida, United States

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North Miami Beach, Florida, United States

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Pembroke Pines, Florida, United States

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Pompano Beach, Florida, United States

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Tampa, Florida, United States

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Tampa, Florida, United States

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Tampa, Florida, United States

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Tampa, Florida, United States

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The Villages, Florida, United States

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West Miami, Florida, United States

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West Palm Beach, Florida, United States

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Eatonton, Georgia, United States

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Orland Park, Illinois, United States

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La Vista, Nebraska, United States

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The Bronx, New York, United States

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The Bronx, New York, United States

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Chapel Hill, North Carolina, United States

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High Point, North Carolina, United States

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Chickasha, Oklahoma, United States

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Providence, Rhode Island, United States

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Greenville, South Carolina, United States

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Rock Hill, South Carolina, United States

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Carrollton, Texas, United States

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Dallas, Texas, United States

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DeSoto, Texas, United States

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Forney, Texas, United States

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Fort Worth, Texas, United States

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Harlingen, Texas, United States

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Houston, Texas, United States

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Kingwood, Texas, United States

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Lewisville, Texas, United States

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Mesquite, Texas, United States

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San Antonio, Texas, United States

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Splendora, Texas, United States

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Stafford, Texas, United States

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Sugar Land, Texas, United States

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Bahía Blanca, Buenos Aires, Argentina

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Ciudad Autonoma de Buenos Aire, Buenos Aires, Argentina

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Mar del Plata, Buenos Aires, Argentina

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Mar del Plata, Buenos Aires, Argentina

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Ramos Mejía, Buenos Aires, Argentina

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San Nicolás de los Arroyos, Buenos Aires, Argentina

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Buenos Aires, Ciudad Autonoma Buenos Aires, Argentina

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Córdoba, Córdoba Province, Argentina

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Rosario, Santa Fe Province, Argentina

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Rosario, Santa Fe Province, Argentina

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San Miguel de Tucumán, Tucumán Province, Argentina

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San Miguel de Tucumán, Tucumán Province, Argentina

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Ciudad Autonoma de Buenos Aire, , Argentina

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Córdoba, , Argentina

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Santiago del Estero, , Argentina

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Maceió, Alagoas, Brazil

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Fortaleza, Ceará, Brazil

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Fortaleza, Ceará, Brazil

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Cachoeiro de Itapemirim, Espírito Santo, Brazil

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Serra, Espírito Santo, Brazil

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Vitória, Espírito Santo, Brazil

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Salvador, Estado de Bahia, Brazil

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Salvador, Estado de Bahia, Brazil

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Brasília, Federal District, Brazil

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Cuiabá, Mato Grosso, Brazil

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Belo Horizonte, Minas Gerais, Brazil

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Belo Horizonte, Minas Gerais, Brazil

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Belo Horizonte, Minas Gerais, Brazil

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Campina Grande do Sul, Paraná, Brazil

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Rio de Janeiro, Rio Do Janeiro, Brazil

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Natal, Rio Grande do Norte, Brazil

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Natal, Rio Grande do Norte, Brazil

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Passo Fundo, Rio Grande do Sul, Brazil

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Porto Alegre, Rio Grande do Sul, Brazil

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Porto Alegre, Rio Grande do Sul, Brazil

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Porto Alegre, Rio Grande do Sul, Brazil

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Porto Alegre, Rio Grande do Sul, Brazil

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Porto Velho, Rondônia, Brazil

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Blumenau, Santa Catarina, Brazil

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Florianópolis, Santa Catarina, Brazil

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Itajaí, Santa Catarina, Brazil

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Itajaí, Santa Catarina, Brazil

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Joinville, Santa Catarina, Brazil

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Barretos, São Paulo, Brazil

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Bento Gonçalves, São Paulo, Brazil

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Botucatu, São Paulo, Brazil

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Campinas, São Paulo, Brazil

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Ijuí, São Paulo, Brazil

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Jaú, São Paulo, Brazil

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Osasco, São Paulo, Brazil

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Ribeirão Preto, São Paulo, Brazil

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Santa Catarina, São Paulo, Brazil

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São José do Rio Preto, São Paulo, Brazil

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São Paulo, São Paulo, Brazil

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São Paulo, São Paulo, Brazil

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São Paulo, São Paulo, Brazil

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São Paulo, São Paulo, Brazil

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Valinhos, São Paulo, Brazil

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Rio de Janeiro, , Brazil

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Edmonton, Alberta, Canada

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Chicoutimi, Quebec, Canada

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Munich, Bavaria, Germany

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Frankfurt am Main, Hesse, Germany

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Berlin, , Germany

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Hamburg, , Germany

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Hyderabad, Andhra Pradesh, India

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Nellore, Andhra Pradesh, India

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Visakhapatnam, Andhra Pradesh, India

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Nellore, Andhra Prasesh, India

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Ahmedabad, Gujarat, India

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Gotri, Gujarat, India

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Surat, Gujarat, India

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Surat, Gujarat, India

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Faridabad, Haryana, India

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Bangalore, Karnataka, India

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Bangalore, Karnataka, India

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Bangalore, Karnataka, India

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Bengaluru, Karnataka, India

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Dombivali, Maharashtra, India

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Nashik, Maharashtra, India

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Nashik, Maharashtra, India

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Pune, Maharashtra, India

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New Delhi, National Capital Territory of Delhi, India

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Jaipur, Rajasthan, India

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Jaipur, Rajasthan, India

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Chennai, Tamil Nadu, India

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Fukuoka, Fukuoka, Japan

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Kasuga, Fukuoka, Japan

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Kitakyushu, Fukuoka, Japan

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Fukuoka, Fukuoka City, Japan

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Sapporo, Hokkaido, Japan

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Himeji, Hyōgo, Japan

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Tsuchiura, Ibaraki, Japan

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Kanazawa, Ishikawa-ken, Japan

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Fujisawa, Kanagawa, Japan

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Kamakura, Kanagawa, Japan

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Izumisano, Osaka, Japan

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Toda, Saitama, Japan

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Uozu, Toyama, Japan

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Chiba, , Japan

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Fukuoka, , Japan

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Okayama, , Japan

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Daugavpils, , Latvia

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Riga, , Latvia

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Saltillo, Coahuila, Mexico

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Torreón, Coahuila, Mexico

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Guadalajara, Jalisco, Mexico

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Mexico City, Mexico City, Mexico

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Monterrey, Nuevo León, Mexico

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Monterrey, Nuevo León, Mexico

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Monterrey, Nuevo León, Mexico

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Monterrey, Nuevo León, Mexico

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Monterrey, Nuevo León, Mexico

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Querétaro City, Querétaro, Mexico

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Cancún, Quintana Roo, Mexico

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San Luis Potosí City, San Luis Potos, Mexico

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Yucatán, Yucatán, Mexico

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Chihuahua City, , Mexico

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Oaxaca City, , Mexico

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Puebla City, , Mexico

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Veracruz, , Mexico

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Veracruz, , Mexico

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The Hague, , Netherlands

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The Hague, , Netherlands

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Utrecht, , Netherlands

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Zwijndrecht, , Netherlands

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Zwijndrecht, , Netherlands

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Islamabad, , Pakistan

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Karachi, , Pakistan

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Karachi, , Pakistan

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Lahore, , Pakistan

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Rawalpindi, , Pakistan

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Baguio City, Cordillera, Philippines

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Tacloban City, Leyte, Philippines

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Ermita, Manila, Philippines

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San Fernando City, Pampanga, Philippines

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Iloilo City, , Philippines

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Mandaluyong, , Philippines

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Baloteşti, , Romania

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Bucharest, , Romania

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Bucharest, , Romania

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Bucharest, , Romania

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Bucharest, , Romania

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Constanța, , Romania

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Craiova, , Romania

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Oradea, , Romania

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Sibiu, , Romania

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Suceava, , Romania

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Timișoara, , Romania

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East London, Eastern Cape, South Africa

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Johannesburg, Gauteng, South Africa

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Pretoria, Gauteng, South Africa

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Pretoria, Gauteng, South Africa

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Pretoria, Gauteng, South Africa

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Randburg, Gauteng, South Africa

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Thabazimbi, Limpopo, South Africa

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Kimberley, Northern Cape, South Africa

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Cape Town, Western Cape, South Africa

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Plettenberg Bay, Western Cape, South Africa

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Badalona, Barcelona, Spain

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Centelles, Barcelona, Spain

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Marbella, Malaga, Spain

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Málaga, Malaga, Spain

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Barcelona, , Spain

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Madrid, , Spain

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Solna, , Sweden

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Umeå, , Sweden

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La Marsa, , Tunisia

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Monastir, , Tunisia

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Montfleury, , Tunisia

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Sfax, , Tunisia

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Sousse, , Tunisia

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Sousse, , Tunisia

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Tunis, , Tunisia

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Tunis, , Tunisia

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Ankara, , Turkey (Türkiye)

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Ankara, , Turkey (Türkiye)

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Ankara, , Turkey (Türkiye)

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Ankara, , Turkey (Türkiye)

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Ankara, , Turkey (Türkiye)

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Antalya, , Turkey (Türkiye)

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Antalya, , Turkey (Türkiye)

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Bursa, , Turkey (Türkiye)

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Denizli, , Turkey (Türkiye)

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Istanbul, , Turkey (Türkiye)

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Istanbul, , Turkey (Türkiye)

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Istanbul, , Turkey (Türkiye)

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Istanbul, , Turkey (Türkiye)

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Istanbul, , Turkey (Türkiye)

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Istanbul, , Turkey (Türkiye)

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Izmir, , Turkey (Türkiye)

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Izmir, , Turkey (Türkiye)

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Izmir, , Turkey (Türkiye)

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Izmir, , Turkey (Türkiye)

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Kayseri, , Turkey (Türkiye)

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Samsun, , Turkey (Türkiye)

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Yenimahalle, , Turkey (Türkiye)

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Exeter, Devon, United Kingdom

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Plymouth, Devon, United Kingdom

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London, Greater London, United Kingdom

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London, Greater London, United Kingdom

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Castleford, West Yourkshire, United Kingdom

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Countries

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United States Argentina Brazil Canada Germany India Japan Latvia Mexico Netherlands Pakistan Philippines Romania South Africa Spain Sweden Tunisia Turkey (Türkiye) United Kingdom

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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AT-03A-017

Identifier Type: -

Identifier Source: org_study_id

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