Randomized Multicenter Study on the Efficacy and Safety of Favipiravir for Parenteral Administration Compared to Standard of Care in Hospitalized Patients With COVID-19

Phase 3

Completed

• Conditions: COVID-19
• Interventions: Drug: Favipiravir; Drug: Remdesivir

• Registration Number: NCT05185284
• Lead Sponsor: Promomed, LLC

Brief Summary

This is open-labe randomized multicenter comparative Phase III study conducted in 7 medical facilities. The objective of the study is to assess the efficacy and safety of Favipiravir for parenteral administration compared with the Standard of care (SOC) in hospitalized patients with moderate COVID-19 pneumonia.

Detailed Description

Upon signing the informed consent form and screening, 217 eligible patients hospitalized with COVID-19 pneumonia were randomized at a 1:1 ratio to receive either Favipiravir intravenously by drip infusion for 2 hours 1600 mg twice a day (BID) on Day 1 followed by 800 mg BID on Days 2-14 (1600/800 mg), or SOC. The course of treatment by Favipiravir is 10 days.

Study Timeline

• Study Start: 2021-08-11
• Primary Completion: 2021-12-30
• Study Completion: 2021-12-30
• Status Verified: 2022-01
• Study First Submitted: 2022-01-07
• Study First Submitted QC: 2022-01-07
• Last Update Submitted: 2022-01-07
• Study First Posted: 2022-01-11
• Last Update Posted: 2022-01-11

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 217

Inclusion Criteria

1. Availability of the Informed Consent Form of the Patient Information Leaflet (PIL) signed and dated by patient.

2. Men and women aged 18 to 80 years inclusive at the time of signing the Informed Consent Form in PIL.

3. Confirmed case of COVID-19 at the time of screening based on SARS-CoV-2 RNA test using nucleic acid amplification (NAA) method. It is acceptable to include a patient with a presumptive COVID-19 diagnosis prior to receiving the results of SARS-CoV-2 RNA test made at the screening stage.

4. Hospital admission due to COVID-19.

5. Moderate severity infection with SARS-CoV-2:

   • Clinical signs:
   • Mandatory: CT pattern typical of a viral lesion (lesion volume is minimal or moderate; CT 1-2).
   • Additional (at least 1 of the following criteria):
   • body temperature > 38 °C;
   • RR > 22/min;
   • shortness of breath on exertion;
   • SpO2 < 95%;
   • Serum CRP > 10 mg/L.

6. Patient's consent to use reliable contraceptive methods throughout the study and within 1 month for women and 3 months for men after its completion. Reliable means of contraception are: sexual abstinence, use of condom in combination with spermicide.

For men (optional): Consent to avoid sexual contact with pregnant women for the duration of the study and for 3 months after its completion.

Women incapable of childbearing may also participate in the study (with past history of: hysterectomy, tubal ligation, infertility, menopause for more than 2 years), as well as men with infertility or a history of vasectomy.

Exclusion Criteria

1. Hypersensitivity to favipiravir, remdesivir and/or other components of the study drug.
2. Impossibility of CT procedure (for example, gypsum dressing or metal structures in the field of imaging).
3. History of vaccination against COVID-19.
4. History of presumptive or confirmed COVID-19 case of moderate, severe and extremely severe course of the disease.
5. Use of favipiravir or remdesivir within 10 days prior to screening.
6. The need to use drugs from the list of prohibited therapy.
7. Meeting the criteria for severe and extremely severe course of the disease.
8. Need for treatment in the intensive care unit.
9. Impaired liver function (AST and/or ALT ≥ 2 UNL and/or total bilirubin ≥ 1.5 UNL) at the time of screening.
10. Renal impairment (GFR < 60 ml/min) at the time of screening.
11. History of gout.
12. Positive testing for HIV, syphilis, hepatitis B and/or C.
13. Chronic heart failure FC III-IV according to New York Heart Association (NYHA) functional classification (see Appendix 2).
14. Malignancies in the past medical history.
15. Alcohol, pharmacological and/or drug addiction in the past medical history and/or at the time of screening.
16. Schizophrenia, schizoaffective disorder, bipolar disorder, or other history of mental pathology or suspicion of their presence at the time of screening.
17. Severe, decompensated or unstable somatic diseases (any disease or condition that threaten the patient's life or impair the patient's prognosis, and also make it impossible for him/her to participate in the clinical study).
18. Any history data that the investigating physician believes could lead to complication in the interpretation of the study results or create an additional risk to the patient as a result of his/her participation in the study.
19. Patient's unwillingness or inability to comply with procedures of the Study Protocol (in the opinion of physician investigator).
20. Pregnant or nursing women or women planning pregnancy.
21. Participation in another clinical study for 3 months prior to inclusion in the study.
22. Other conditions that, according to the physician investigator, prevent the patient from being included in the study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Favipiravir (Areplivir)	Favipiravir	Arm 1 (n=106) receives the study drug Areplivir for parenteral administration as follows: Day 1 1600 mg 2 times a day, Day 2-10 800 mg 2 times a day. Administration will be done intravenously by drip infusion for 2 hours. The course of treatment is 10 days. The test drug is administered in hospital setting under supervision of a clinical investigator. The test drug is not handed over to the patient.
Standard of care	Favipiravir	Arm 2 (n=108) patients receive standard therapy prescribed in accordance with the recommended treatment regimens included in the Interim Guidelines for the prevention, diagnosis and treatment of new coronavirus infection (COVID-19) approved by the Russian Ministry of Health by decision of the investigator and taking into account the availability of drugs at the study site. Might include Favipiravir tab, Remdesivir or other recommended schemes. Standard therapy is administered in hospital setting. Discharge of patients from a hospital is carried out in accordance with the local practice of the study site in compliance with the current sanitary and epidemiological regime.
Standard of care	Remdesivir	Arm 2 (n=108) patients receive standard therapy prescribed in accordance with the recommended treatment regimens included in the Interim Guidelines for the prevention, diagnosis and treatment of new coronavirus infection (COVID-19) approved by the Russian Ministry of Health by decision of the investigator and taking into account the availability of drugs at the study site. Might include Favipiravir tab, Remdesivir or other recommended schemes. Standard therapy is administered in hospital setting. Discharge of patients from a hospital is carried out in accordance with the local practice of the study site in compliance with the current sanitary and epidemiological regime.

Primary Outcome Measures

Name	Time	Method
Rate of Clinical Status Improvement	By Visit 3, approximately 10 days	Rate of clinical status improvement by WHO categorical ordinal scale of clinical status improvement by 2 or more categories by Day 10. WHO Ordinal Scale for Clinical Improvement (WHO-OSCI), 0 - uninfected (There are no clinical and virological signs of infection), 8 - dead, higher scores mean a worse outcome
Time to Clinical Improvement	28 days	Time (in days) to improvement in clinical status by WHO categorical ordinal scale of clinical status improvement

Secondary Outcome Measures

Name	Time	Method
End of Fever on Days of study	14 Days	Percentage of patients with fever disappearance (body temperature \< 37,2 °C in 3 consecutive measurements without antipyretic medication) an Days 5, 10 and 14.
Mortality	28 Days	Incidence of fatal cases (% of patients)
Change in the Level of Lung Damage According to CT	14 Days	Assessment of lung injury (degree of damage by "empirical" visual scale and % of patients) according to CT data comparing to baseline. The number of patients in whom by the end of therapy there was an improvement in the condition of the lungs (a decrease in the volume of the lesion according to CT)
Rate of Transfer to the Intensive Care Unit	28 days	Percentage of patients transferred to intensive care unit
Rate of the Use of Non-invasive Lung Ventilation	28 Days	Percentage of cases with non-invasive lung ventilation
Rate of the Use of Mechanical Ventilation	28 Days	Percentage of cases with mechanical lung ventilation (% of patients)
Rate of Clinical Status Improvement	14 Days	Percentage of patients with clinical status of 0 and 1 point according to the WHO categorical ordinal scale of clinical improvement on Days 5, 10 and 14.
Rate of Viral Elimination	14 days	Percentage of patients with SARS-CoV-2 elimination (negative test for SARS-CoV-2 by NAA method) on Days 5, 10, and 14.

Trial Locations

Locations (6)

Regional Clinic Hospital of Ryazan; 🇷🇺 Ryazan', Russian Federation

Smolensk clinical hospital №1; 🇷🇺 Smolensk, Russian Federation

State Clinical Hospital №50; 🇷🇺 Moscow, Russian Federation

Regional budgetary health care institution "Ivanovo Clinical Hospital named after Kuvaevs"; 🇷🇺 Ivanovo, Russian Federation

Medical institute Ogarev Mordovia State university; 🇷🇺 Saransk, Russian Federation

State Budgetary Institution of Healthcare of the City of Moscow "City Clinical Hospital No. 24 of the Department of Healthcare of the City of Moscow"; 🇷🇺 Moscow, Russian Federation