ClinicalTrials.gg
Not yet recruitingNCT05060705Updated Apr 17, 2024

"Efesovir" (FS-1) for COVID-19, Phase 2

A Phase 2 interventional study of Efesovir in Covid19, sponsored by Scientific Center for Anti-infectious Drugs, Kazakhstan. Not yet recruiting at 1 site in Kazakhstan. Open to participants aged 18 Years to 59 Years. Per ClinicalTrials.gov, last updated 2024-04-17.

Sponsored by Scientific Center for Anti-infectious Drugs, Kazakhstan · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Apr 2026, 7 months ago, but the record still lists the study as not yet recruiting.
Phase
Phase 2
Study type
Interventional
Enrollment
62
Allocation
Randomized
Ages
18 Years to 59 Years
Sex
All
01

Study summary

Study of the efficacy and safety of the new drug "Efesovir" in comparison with the drug "Remdesivir" in the treatment of patients hospitalized with COVID-19.

The hypothesis of clinical study is the clinical efficacy of new drug "Efesovir" is 10% to 30% higher than of "Remdesivir".

02

Conditions studied

  • Covid19

Keywords

  • COVID19
  • viral pneumonia
  • FS-1
  • Efesovir
03

In context

COVID-19

7,990 studies on the registry are indexed under COVID-19; 466 are open to participants now.

This study's planned enrollment of 62 is below the median of 102 across 4,364 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

Scientific Center for Anti-infectious Drugs, Kazakhstan is the lead sponsor of 3 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 59 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • polymerase chain reaction (PCR) confirmed coronavirus infection (COVID-19) in hospitalized patients with severe risk factors in age from 18 years to 59 years, of both sexes, irrespective of national or ethnic origin
  • the duration of the COVID-19 disease is no more than 10 days
  • informed concent to participate in clinical trials
  • informed concent to to use reliable methods while participating in a clinical trial

Exclusion criteria

Exclusion Criteria:

  • age less than 18 years old and over 59 years old
  • pregnancy or breastfeeding
  • , allergy, intolerance to iodine, iodine-containing medicines
  • hypersensitivity to Remdesivir or its components
  • impaired consciousness, causing the impossibility of oral administration
  • conditions or circumstances that, in the opinion of the investigator, may affect the patient's safety or the quality of the results obtained
  • participation in another clinical trial, including in the period up to 2 months before this study
  • signs of multiple organ failure
  • (ALT), aspartate aminotransferase (AST) is 5 or more times higher than normal
  • thrombocytopenia below 100 * 10\^9/ l
  • decrease in (GFR) less than 30 ml / min by 1.73 m2
  • chronic heart failure with reduced
  • liver failure
  • coagulopathy
  • mechanical ventilation for 48 hours or more
  • extracorporeal membrane oxygenation (ECMO)
  • disseminated intravascular coagulation
Terms in these criteria, in plain language(5)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

LVEF (left ventricular ejection fraction)

The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
62 participants (estimated)

Study arms

  • Experimental
    Efesovir

    The patients of experimental arm take study drug Efesovir twice a day as an antiviral therapy in dose 0.125 ml / kg. Daily dose of Efesovir: 0.250 ml / kg. Duration of treatment is 5 - 10 days, depending on the severity of the disease.

    Drug: Efesovir

  • Active comparator
    Remdesivir

    The patients are treated with the antiviral drug "Remdesivir" in dose 200 mg intravenously on the 1st day, then by 100 mg intravenously daily for 5 - 10 days, depending on the severity of the disease.

    Drug: Efesovir

Interventions

  • DrugEfesovir

    Antiviral therapy of COVID19 with Efesovir oral solution in dose 0.125 ml / kg two times per day. Duration of treatment is 5 - 10 days, depending on the severity of the disease.

    Also known as: FS-1

06

What researchers measure

Primary outcomes

  1. Clinical Response Rate

    Clinical Response Rate is calculated as the number of trial subjects with effective treatment over the total number of subjects multiplied by 100. It is calculated in each study group. Measured in percents. The outcome is estimated among randomized subjects completed clinical study with the protocol requirements (per protocol population (PPP)). Clinical response is evaluated as effective treatment if: all signs and symptoms of COVID19 are resolved or improved with no worsening or appearance of new signs and symptoms; there is no requirement for additional antiviral of antibacterial therapy; chest roentgenograms (CT scans) are improved. The outcome is assessed in day 21 from the start of Study Drug treatment (visits 13).

    Time frame: 21 days

Secondary outcomes

  1. Early Clinical Response Rate

    Early clinical response rate defined as complete resolution or significant improvement of at least 2 of 4 leading baseline signs and symptoms within 72 hours after the start of Study (Referent) Drug treatment. It is estimated in the Intent to Treat (ITT) population. The outcome is measured in percents.

    Time frame: 72 hours (3 days) of study drug treatment

  2. Early Clinical Response Rate in pneumonia

    The outcome is estimated in patients with pneumonia due to coronavirus infection (modified ITT population). It is defined as complete resolution or significant improvement of at least 2 of 4 main clinical symptoms of pneumonia (cough, shortness of breath, chest pain, sputum) within 72 hours after the start of Study (or Referent) Drug treatment. The outcome is measured in percents. The percentage of subjects with an early clinical response to pneumonia in the compared groups is statistically estimated.

    Time frame: 72 hours (3 days) of study drug treatment

  3. Percentage of clinically stable patients

    Percentage of patients at Day 3 who are clinically stable. Clinical stability defined as: * Blood oxygen saturation \>= 93% * Temperature \<=38.0°C * Heart rate \<=100 beats per minute * Respiratory rate \<=25 per minute * Systolic blood pressure ≥90 mm Hg * Ability to maintain oral intake * Normal mental status (oriented to person, place or time) A patient is considered to be clinically stable if all stability criteria are met. The outcome is assessed in ITT population. The difference between groups in the percentage of clinically stable patients from the total number of study subjects in the group is statistically evaluated.

    Time frame: 72 hours (3 days) of study drug treatment

  4. Survival rate

    Percentage of participants surviving at day 21. The indicator is calculated as the number of live subjects at the last visit (day 21) divided by the total number of study subjects in the group multiplied by 100. The outcome is estimated among subjects who completed the study in compliance with the protocol (per protocol population (PPP)).

    Time frame: 21 days

  5. Clinical Status Change

    The clinical status is determined by the ordinal scale: 1. Not hospitalized, no limitations on activities 2. Not hospitalized, limitation on activities and/or requiring home oxygen 3. Hospitalized, not requiring supplemental oxygen - no longer requires ongoing medical care 4. Hospitalized, not requiring supplemental oxygen - requiring ongoing medical care 5. Hospitalized, requiring supplemental oxygen 6. Hospitalized, on non-invasive ventilation or high flow oxygen devices 7. Hospitalized, on invasive mechanical ventilation or Extracorporeal Membrane Oxygenation 8. Death Clinical status is assessed in ITT population. The outcome is recorded at all visits, starting from the day of randomization. A decrease in points indicates the effectiveness of treatment. When the indicator changes during the day, the worst score of the day is recorded. Statistical analysis is performed on the Day 7 from the start Study Drug treatment, comparing with the score at randomization.

    Time frame: 7 days

  6. Adverse Events (AE)

    The safety of Study Drug (Referent Drug) will be assessed by adverse event and serious adverse event monitoring.

    Time frame: up to 21 days

  7. Thyroid gland function

    Changes in laboratory parameters of thyroid gland function (hormones) at the last visit in comparison with the baseline data (thyroid stimulating hormone (TSH), free triiodothyronine (FT3)).

    Time frame: Day 21

07

Study locations

1 site
  • Semey Medical University
    Semey, East-Kazakhstan Region 071407, Kazakhstan
    • Asel Zh Baibusinova, PhD · Contactassel.baibussinova@nao-mus.kz · +7 (702)725-07-96
    • Maukaeva B Saule, PhD · Contactsaule.maukayeva@nao-mus.kz · +7(7052)-529-66-75
    • Raikhan E Tuleutaeva, kandidate of medical science · Principal investigator
    • Asel Zh Baibusinova, PhD · Sub investigator
    • Saule B Maukaeva, PhD · Sub investigator
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 17, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05060705
Lead sponsor
Scientific Center for Anti-infectious Drugs, Kazakhstan
Responsible party
Sponsor
First posted
Sep 29, 2021
Start date
Dec 2025 (estimated)
Primary completion
Apr 2026 (estimated)
Completion
Nov 2026 (estimated)
Last update
Apr 17, 2024

Study contacts

Marina Lankina, PhD
Contact
m-lankina@list.ru
+77057064410
Gulshara Akhmetova, PhD
Contact
akhmetovagk@yandex.ru
+77085348842

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is not yet recruiting, as verified in Apr 2024. You cannot join it, but the record below documents what was studied.

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