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COVID-19Phase 2/3CoTeTNCT05459532

A Randomised, Multi-centre, Double-blind, Phase 3 Study to Observe the Effectiveness, Safety and Tolerability of Molnupiravir Compared to Placebo Administered Orally to High-risk Adult Outpatients With Mild COVID-19 Receiving Local Standard of Care in South Africa

A Phase 2/3 study testing Molnupiravir 200 mg in people with COVID-19, run by University of Witwatersrand, South Africa at 4 sites in South Africa.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This is a multi-centre, double-blind, phase 3 study to observe the effectiveness, safety, and tolerability of molnupiravir 800 mg administered 12-hourly for five days in adult patients with mild COVID-19 at the time of enrolment, who are at risk of progression to severe disease, compared to a placebo. Read more about this study

Who is it for?
Ages 50 years and olderHealthy volunteers can take part
Conditions the study is for
COVID-19
What is being tested?
Molnupiravir 200 mg
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
59 participants
Where
4 sitesSouth Africa
Study dates
12 Aug 2022to 30 Sep 2023
Phase
Phase 2/3
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 50 years and older
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Able and willing to provide written or electronic informed consent prior to any study-specific procedure.
  • Age ≥50 at the time of signing the informed consent form.
  • Women of reproductive potential must have a negative pregnancy test at screening and be using a highly effective method of contraception. Highly effective methods of contraception
  • A male participant must wear a condom when engaging in any activity that allows for passage of ejaculate to another while taking the investigational product. Male participants should also be advised of the benefit for a female partner to use a highly effective method of contraception as condom may break or leak.
  • Self-reported symptoms of COVID-19 with onset no more than five days prior to screening informed consent including at least one of, fever or chills, cough, sore throat, rhinorrhoea or rhinitis or sinusitis, shortness of breath, headache, myalgia, new onset anosmia or ageusia, nausea, diarrhoea, or extreme fatigue, or other symptoms recognized in local and international guidelines as typical of mild COVID-19.
  • SARS-CoV-2 infection confirmed through a positive LumiraDx rapid antigen test on the day of screening or a positive RT-PCR within two days prior to screening.
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  • Participant is at high risk for progression to severe COVID-19, this defined as either:
  • Age ≥50 with at least one of the following background or medical conditions: diabetes mellitus, obesity (BMI 30 kg/m2), hypertension, HIV, active or previous TB.
  • Age ≥65
  • Participant agrees to comply with study procedures, including the completion of a daily diary for 10 days from the time of enrolment, and to be available for study contacts and visits.
  • -

Who cannot join

  • Pregnant or breastfeeding women, or women planning/desiring to become pregnant during the 28 days following enrolment into the study.
  • Duration of self-reported symptoms of COVID-19 for more than five days prior to screening.
  • Signs of respiratory distress or severe disease prior to enrolment, including:
  • Inability/unlikely to be in the study area for the duration of the 28-day follow-up period.
  • Inability to tolerate oral medications.
  • Any surgical or medical condition which might significantly alter the absorption, distribution, metabolism, or excretion of drugs, or which may jeopardize the safety of the patient or the objectives of the study. The Investigator should make this determination in consideration of the volunteer's medical history.
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  • The volunteer is assessed to be clinically unstable in the Investigator's opinion.
  • Participation in another investigational study involving an investigational product within 30 days, or 5 half-lives, whichever is longer, prior to screening.
  • Personnel (e.g., investigator, sub-investigator, research assistant, pharmacist, study coordinator or anyone mentioned in the delegation log) directly involved in the conduct of the study.
  • Any physical, mental, or social condition, drug/alcohol use, history of illness or laboratory abnormality that, in the Investigator's judgment, might jeopardise the safety of the patient in the context of this study, or might interfere with study procedures or the ability of the subject to adhere to and complete the study. The Investigator should make this determination in consideration of the volunteer's medical history.

Trial locations and contacts

4 sites in 1 country.

South Africa4 sites
  • Nelson R. Mandela School of Medicine 3rd Floor, K-RITH Tower Building

    Durban, KwaZulu-Natal, 3935

  • Sunnyside Office Park

    Johannesburg, Gauteng, 2193

  • The Aurum Institute: Gavin J Churchyard Legacy Centre Klerksdorp Clinical Research Centre

    Klerksdorp, North West, 2571

  • Nelson Mandela Academic Clinical Research Unit (NeMACRU)

    Umtata, Eastern Cape, 5099

Other trials in South Africa

About this study

Official title: This is a Multi-centre, Double-blind, Phase 3 Study to Observe the Effectiveness, Safety, and Tolerability of Molnupiravir 800 mg Administered 12-hourly for Five Days to Adult Patients With Mild COVID-19 at the Time of Enrolment Who Are at Risk of Progression to Severe Disease, Compared to a Placebo. Patients With Recent Onset of COVID-19 Symptoms Will be Screened to Assess Eligibility for Enrolment. Confirmation of SARS-CoV-2 Infection Will be Performed Through Rapid Antigen Detection Using the LumiraDx Point of Care Diagnostic Platform.

This is a multi-centre, double-blind, phase 3 study to observe the effectiveness, safety, and tolerability of molnupiravir 800 mg administered 12-hourly for five days in adult patients with mild COVID-19 at the time of enrolment, who are at risk of progression to severe disease, compared to a placebo.

Read the detailed description

This is a multi-centre, double-blind, phase 3 study to observe the effectiveness, safety, and tolerability of molnupiravir 800 mg administered 12-hourly for five days in adult patients with mild COVID-19 at the time of enrolment, who are at risk of progression to severe disease, compared to a placebo.

Patients with recent onset of COVID-19 symptoms will be screened to assess eligibility for enrolment. Confirmation of SARS-CoV-2 infection will be performed through rapid antigen detection using the LumiraDx point of care diagnostic platform. Approximately 4000 eligible patients will be enrolled and will be randomised in a 1:1 manner to start treatment with either molnupiravir or a placebo on the same day. Patients will record their symptoms (through a self-administered questionnaire) and self-observed vital signs daily for 10 days from the time of enrolment and will be contacted by study team personnel on Days 3, 6 and 10 to monitor their well-being. Adverse event and concomitant medication data will be collected. A final end-of-study follow-up visit will be conducted on Day 29.

An independent Data and Safety Monitoring Board (DSMB) will be convened for this study with expertise in COVID-19 or respiratory viruses, and emerging epidemics. The purpose of the DSMB is to monitor the study for safety and operational futility.

In addition to the usual, regular, required reporting to SAHPRA, the investigator anticipates that additional reporting will be required by the Clinical Trials Committee, noting the severity of the 3rd and 4th waves, the level of ''breakthrough'' infections in the context of high background comorbidities, and the urgent interest in this class of drugs.

Conditions
COVID-19
Being tested
Molnupiravir 200 mg
Medical subject headings
COVID-19

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Molnupiravir 200 mgDrug

    The drug is orally bioavailable (and is indicated for treatment of mild to moderate COVID-19 in adults with a positive SARS-COV-2 diagnostic test and who have at least one risk factor for developing severe illness. The recommended dose is 800 mg (four 200 mg capsules) taken orally 12-hourly for five days, and should be administered as soon as possible after diagnosis of COVID-19 has been made and within five days of symptom onset.

Study groups in NCT05459532
Study groupRoleWhat they receive
MonulpiravirExperimentalEligible participants will be randomised in a 1:1 manner to receive either molnupiravir 800 mg orally approximately 12-hourly for five days or a placebo for the equivalent amount of time.
Receives: Drug: Molnupiravir 200 mg
PlaceboPlacebo comparatorEligible participants will be randomised in a 1:1 manner to receive either molnupiravir 800 mg orally approximately 12-hourly for five days or a placebo for the equivalent amount of time.
Receives: Drug: Molnupiravir 200 mg

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. To evaluate the effectiveness of molnupiravir compared to placebo in preventing severe disease progression in adults with mild COVID-19

    Combination of incidence of COVID-19-related hospitalisation (24 hours of care in a hospital or similar acute care facility) and COVID-19-related mortality to Day 29

    Measured: 29 Days

  2. To evaluate the safety of molnupiravir in adults with mild COVID-19

    Adverse events (including serious adverse events and adverse drug reactions)

    Measured: 29 Days

  3. To evaluate the safety of molnupiravir in adults with mild COVID-19

    Self-assessed vital signs to Day 10

    Measured: 29 Days

Secondary outcomes (16)
  1. To facilitate same-day COVID-19 diagnosis and treatment initiation in adults with mild COVID-19 and comorbid conditions

    Proportion of enrolled patients for whom diagnosis and same day treatment initiation was facilitated through use of a LumiraDx™ rapid antigen test

    Measured: 29 Days

  2. To assess the tolerability of molnupiravir in adults with mild COVID-19

    Severity of adverse events

    Measured: 29 Days

  3. To assess the tolerability of molnupiravir in adults with mild COVID-19

    Adverse event-related study drug discontinuations

    Measured: 29 Days

  4. To describe time to symptom resolution in adults with mild COVID-19 treated with molnupiravir compared to placebo

    Time to sustained resolution of symptoms as reported in the Flu-PRO© Plus

    Measured: 29 Days

  5. To evaluate maximum COVID-19 disease severity in adults treated with molnupiravir compared to placebo

    Maximum score on the WHO Clinical Progression Scale from Day 1 to Day 29

    Measured: 29 Days

  6. To evaluate the relationship between effectiveness of molnupiravir and time between onset of symptoms and initiation of treatment

    Number of days from symptom onset to initiation of treatment

    Measured: 29 Days

  7. To evaluate the relationship between effectiveness of molnupiravir and time between onset of symptoms and initiation of treatment

    Incidence of hospitalisation (24 hours of care in a hospital or similar acute care facility) and/or death to Day 29 in patients with co-morbid conditions

    Measured: 29 Days

  8. To evaluate the relationship between effectiveness of molnupiravir and time between onset of symptoms and initiation of treatment

    Time to sustained resolution of symptoms as reported in the Flu-PRO Plus

    Measured: Day 1 to Day 10 and Day 29

  9. To evaluate the relationship between effectiveness of molnupiravir and time between onset of symptoms and initiation of treatment

    Maximum score on the WHO Clinical Progression Scale from Day 1 to Day 29. On a scale of 0 to 10 (0 being uninfected and 10 being worse/death)

    Measured: Day 0, 3, 6, 10, 29

  10. To describe adherence to a 5-day course of molnupiravir in adults with mild COVID-19

    Proportion of patients completing the course of molnupiravir as prescribed

    Measured: 29 Days

  11. To describe the utilisation of health care services by adults with mild COVID-19 treated with molnupiravir compared to placebo

    Rate of hospital, emergency facility, clinic, health care practitioner or home visits to Day 29

    Measured: 29 Days

  12. To report the incidence and outcome of pregnancies in female participants who received molnupiravir

    Incidence of pregnancy in female participants to Day 29

    Measured: 29 Days

  13. To report the incidence and outcome of pregnancies in female participants who received molnupiravir

    20-week gestational age ultrasound findings

    Measured: Once

  14. To report the incidence and outcome of pregnancies in female participants who received molnupiravir

    Pregnancy complications

    Measured: Throughout the pregnancy

  15. To report the incidence and outcome of pregnancies in female participants who received molnupiravir

    Pregnancy outcome

    Measured: Once

  16. To report the incidence and outcome of pregnancies in female participants who received molnupiravir

    Infant wellbeing to three months of age

    Measured: Once

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted15 Jul 2022
  2. Study start12 Aug 2022
  3. Primary completion7 Jul 2023
  4. Study completion30 Sep 2023

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2/3
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Single group
Model description
Molnupiravir is a broad-spectrum antiviral that is an orally bioavailable prodrug of the nucleoside analogue NHC. NHC distributes into cells where it is phosphorylated to form the pharmacologically active NHC-TP. NHC-TP acts by a mechanism known as viral error catastrophe. NHC-TP incorporation into viral RNA by the viral RNA polymerase, results in an accumulation of errors in the viral genome leading to inhibition of replication.
Masking
None (open label)
Enrolment
59 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05459532
Sponsor's protocol ID
EZ-SS-029
Acronym
CoTeT
Status last verified
Jun 2025
First submitted
13 Jul 2022
Last updated
1 Jul 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: The data that will be shared is all of the individual participant data collected during the trial, after deidentification.

Questions about this trial

What is this clinical trial studying?

A Phase 2/3 study testing Molnupiravir 200 mg in people with COVID-19, run by University of Witwatersrand, South Africa at 4 sites in South Africa.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 11 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 1 Jul 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 4 sites in South Africa. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

To evaluate the effectiveness of molnupiravir compared to placebo in preventing severe disease progression in adults with mild COVID-19 (time frame: 29 Days). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Jul 2025.

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