Phase III, single-center with co-participating units, randomized, double-blind, parallel, placebo-controlled clinical study

Hypothesis:

AZVUDINE has a therapeutic potential and safety profile for the treatment of patients infected with SARS-CoV-2.

Goals:

Main goal:

To evaluate the efficacy and safety of AZVUDINE (FNC) in patients infected with SARS-COV-2, in a mild stage;

Specific objective:

To assess the clinical outcome of mild-stage SARS-CoV-2 infected participants treated with AZVUDINE (FNC) versus placebo

Statistical planning:

Statistical description: all statistical tests are performed by bilateral testing. A significance level of 5% will be adopted.

Baseline analysis: including subject distribution, data demographics, and baseline analysis.

Inclusion Criteria:

Individuals who present the following characteristics will be included in this study:

1. Age ≥18 years, regardless of gender;
2. Fluorescence RT-PCR test result of respiratory or blood samples must be positive for COVID-19, or viral gene sequencing of respiratory tract samples must be highly homologous to COVID-19; Individuals with COVID-19 must meet the diagnostic criteria in the "latest version of clinical guidelines for COVID-19" issued by the World Health Organization (WHO) on June 4, 2020;
3. Symptomatic patients who meet the case definition for COVID-19, according to WHO, without evidence of bacterial pneumonia or hypoxia (Sat O2 < 95%) P. [score 1-3];
4. Voluntary participation and signing of the informed consent form.

Exclusion Criteria:

Individuals who present one or more of the following characteristics will not be eligible to participate in this study:

1. Know or suspect that you are allergic to any of the components of AZVUDINE tablets (inactive ingredients: microcrystalline cellulose, lactose hydrate, polyvinylpyrrolidone K30, croscarmellose sodium, magnesium stearate);
2. Individual presenting shortness of breath and Sat O2 < 95%; or any other symptom requiring treatment through hospital admission;
3. Patients with liver disease (total bilirubin ≥2mg/dL, ALT/TGP e AST/TGO ≥5 times above normal limit);
4. Pactients with a history of known liver disease (cirrhosis with ChildPugh classification B and C);
5. Patients with a history of renal insufficiency (glomerular filtration rate < 60mL/min/1,73m2);
6. Patients with history of congestive heart failure (NYHA ¾ grade), untreated symptomatic arrhythmias ormyocardial infarction within 6 months;
7. Individuals with malabsorption syndrome, or other conditions affecting gastrointestinal absorption, and circumstances in which patients require intravenous nutrition, or cannot take medications orally or nasogastrically;
8. Total neutrophil count <750 cells/L;

Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)