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A Randomized, Double-Blind, Placebo-Controlled, Clinical Trial to Evaluate the Safety, Tolerability, Efficacy, and Pharmacodynamics for the Treatment of COVID-19.

A Randomized, Double-Blind, Placebo-Controlled, Clinical Trial to Evaluate the Safety, Tolerability, Efficacy, and Pharmacodynamics of ADX-629 Administered Orally for the Treatment of COVID-19

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04847544
Enrollment
11
Registered
2021-04-19
Start date
2021-03-31
Completion date
2021-10-15
Last updated
2025-02-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Covid19

Brief summary

A Randomized, Double-Blind, Placebo-Controlled, Clinical Trial to Evaluate the Safety, Tolerability, Efficacy, and Pharmacodynamics of ADX-629 Administered Orally for the Treatment of COVID-19

Interventions

ADX-629 administered orally twice daily (BID) for up to 28 days.

DRUGPlacebo

Placebo administered orally BID for up to 28 days.

Sponsors

Aldeyra Therapeutics, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Is a male or female greater than or equal to18 years of age at Screening; * Is willing and able to sign and date (or has a legally authorized representative willing to sign and date) a written (or electronic) informed consent form or provide equivalent consent per Food and Drug Administration guidelines on COVID-19 clinical trials; * Has a documented, laboratory-confirmed severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection as determined by polymerase chain reaction, a SARS-CoV-2 antigen test, or another commercial or public health assay, within 3 days (72 hours) of randomization; * Has COVID-19 of moderate severity, as defined by the following: Positive testing by standard reverse transcription polymerase chain reaction assay or equivalent testing; Symptoms of illness with COVID-19, which could include any of the following: cough, fever, shortness of breath, chest pain, abdominal pain, nausea/vomiting, diarrhea, body aches, weakness/fatigue, or new loss of taste or smell; Clinical signs suggestive of illness with COVID-19, such as respiratory rate greater than or equal to 20 breaths per minute, saturation of oxygen greater than 93% on room air at sea level, or heart rate greater than or equal to 90 beats per minute; and No clinical signs indicative of severe or critical severity.

Exclusion criteria

* Has an NIAID ordinal scale score \<5; * Is on high-flow oxygen or any form of noninvasive ventilation, excluding continuous positive airway pressure (CPAP) alone for sleep disorders (e.g., obstructive sleep apnea); * Has significant cardiovascular disease, defined by myocardial infarction, arterial thromboembolism, or cerebrovascular thromboembolism within 3 months prior to randomization; symptomatic dysrhythmias or unstable dysrhythmias requiring medical therapy; angina requiring therapy; symptomatic peripheral vascular disease; New York Heart Association Class 3 or 4 congestive heart failure; Grade 3 hypertension (diastolic blood pressure greater than or equal to 100 mmHg or systolic blood pressure greater than or equal to 160 mmHg); history of congenital prolonged QT syndrome, or known dyslipidemia; * Is currently taking any investigational products, other than the study drug; * Has any other condition that, in the opinion of the Investigator, could interfere with (or for which the treatment might interfere with) the conduct of the clinical trial or interpretation of the clinical trial results or that would place the subject at undue risk by participating in the clinical trial.

Design outcomes

Primary

MeasureTime frameDescription
Number of Subjects With Serious Adverse EventsThe safety assessment period was Days 1 - 28.Safety was assessed through serious adverse event reporting.

Secondary

MeasureTime frameDescription
Change From Baseline in the National Institute of Allergy and Infectious Diseases (NIAID) ScaleThe efficacy assessment period was 4 weeks; baseline was defined as Day 1 prior to first dose.Change from baseline in the National Institute of Allergy and Infectious Diseases (NIAID) scale, which is an eight-point ordinal scale (1 = death, 8 = not hospitalized with no limitation of activities) where a lower score indicates more severity. The least squares mean (standard error) was derived from mixed model repeated measures which included change from baseline as the response variable, treatment, day of visit, treatment-by-visit interaction as fixed effects, and baseline as a covariate.

Countries

United States

Participant flow

Participants by arm

ArmCount
ADX-629
ADX-629 300 mg administered orally BID for 28 days
7
Placebo
Placebo administered orally BID for 28 days
4
Total11

Baseline characteristics

CharacteristicADX-629PlaceboTotal
Age, Continuous49.0 years55.3 years51.3 years
Race/Ethnicity, Customized
Hispanic or Latino
4 Participants3 Participants7 Participants
Race/Ethnicity, Customized
Not Hispanic or Latino
3 Participants1 Participants4 Participants
SARS-CoV-2 Test Severity
Critical COVID-19
0 Participants0 Participants0 Participants
SARS-CoV-2 Test Severity
Mild COVID-19
2 Participants1 Participants3 Participants
SARS-CoV-2 Test Severity
Moderate COVID-19
5 Participants3 Participants8 Participants
SARS-CoV-2 Test Severity
SARS-CoV-2 Infection without Symptoms
0 Participants0 Participants0 Participants
SARS-CoV-2 Test Severity
Severe COVID-19
0 Participants0 Participants0 Participants
Sex: Female, Male
Female
3 Participants2 Participants5 Participants
Sex: Female, Male
Male
4 Participants2 Participants6 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 70 / 4
other
Total, other adverse events
2 / 71 / 4
serious
Total, serious adverse events
0 / 71 / 4

Outcome results

Primary

Number of Subjects With Serious Adverse Events

Safety was assessed through serious adverse event reporting.

Time frame: The safety assessment period was Days 1 - 28.

Population: Safety population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ADX-629Number of Subjects With Serious Adverse Events0 Participants
PlaceboNumber of Subjects With Serious Adverse Events1 Participants
Secondary

Change From Baseline in the National Institute of Allergy and Infectious Diseases (NIAID) Scale

Change from baseline in the National Institute of Allergy and Infectious Diseases (NIAID) scale, which is an eight-point ordinal scale (1 = death, 8 = not hospitalized with no limitation of activities) where a lower score indicates more severity. The least squares mean (standard error) was derived from mixed model repeated measures which included change from baseline as the response variable, treatment, day of visit, treatment-by-visit interaction as fixed effects, and baseline as a covariate.

Time frame: The efficacy assessment period was 4 weeks; baseline was defined as Day 1 prior to first dose.

Population: Intent-to-treat population with last observation carried forward (LOCF)

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
ADX-629Change From Baseline in the National Institute of Allergy and Infectious Diseases (NIAID) Scale0.86 score on a scaleStandard Error 0.366
PlaceboChange From Baseline in the National Institute of Allergy and Infectious Diseases (NIAID) Scale0 score on a scaleStandard Error 0.484

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026