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ADX-629

Phase 2

Covid19 | Small molecule | Infectious Disease |Aldeyra Therapeutics, Inc.|Last Updated: Jun 3, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment11

FDA Designations

No designations recorded

Clinical trial landscape

ADX-629 · 7 trials · 7 indications

Phase 2 6Phase 1 1
NCT06685692A Clinical Trial Investigating the Safety and Efficacy of Subjects With Alcohol Associated Hepatitis (Part 1)Alcohol Hepatitis
COMPLETED4 Analytics
NCT05717920A Clinical Trial in Subjects With Atopic Dermatitis (Part 1)Atopic Dermatitis
COMPLETED8 Analytics
NCT05392192A Clinical Trial to Evaluate the Safety and Efficacy in Subjects With Chronic CoughChronic Cough
COMPLETED51 Analytics
NCT04908514A Clinical Trial to Evaluate the Safety, Tolerability, and Efficacy of Subjects With Plaque PsoriasisPlaque Psoriasis
COMPLETED10 Analytics
NCT04847544A Randomized, Double-Blind, Placebo-Controlled, Clinical Trial to Evaluate the Safety, Tolerability, Efficacy, and Pharmacodynamics for the Treatment of COVID-19.Covid19
COMPLETED11 Analytics
NCT04728711A Double Masked, Placebo Controlled, Single Center, Randomized Clinical Trial to Assess the Safety and Efficacy of Subjects With Mild Asthma Induced by the Bronchial Allergen Challenge (BAC)Atopic Asthma
COMPLETED8 Analytics
PHASE2COMPLETED
A Clinical Trial Investigating the Safety and Efficacy of Subjects With Alcohol Associated Hepatitis (Part 1)
Alcohol HepatitisUnlock trial analytics
PHASE2COMPLETED
A Clinical Trial in Subjects With Atopic Dermatitis (Part 1)
Atopic DermatitisUnlock trial analytics
PHASE2COMPLETED
A Clinical Trial to Evaluate the Safety and Efficacy in Subjects With Chronic Cough
Chronic CoughUnlock trial analytics
PHASE2COMPLETED
A Clinical Trial to Evaluate the Safety, Tolerability, and Efficacy of Subjects With Plaque Psoriasis
Plaque PsoriasisUnlock trial analytics
PHASE2COMPLETED
A Randomized, Double-Blind, Placebo-Controlled, Clinical Trial to Evaluate the Safety, Tolerability, Efficacy, and Pharmacodynamics for the Treatment of COVID-19.
Covid19Unlock trial analytics
PHASE2COMPLETED
A Double Masked, Placebo Controlled, Single Center, Randomized Clinical Trial to Assess the Safety and Efficacy of Subjects With Mild Asthma Induced by the Bronchial Allergen Challenge (BAC)
Atopic AsthmaUnlock trial analytics

Study Endpoints

Primary Endpoints

Treatment-Emergent Adverse Event Query
Day 1 to Day 28

Incidence and severity of treatment-emergent adverse events

Adverse Event (AE) Query
From Day 1 to Day 90

Incidence and severity of AEs

Number of Subjects With Serious Adverse Events
The safety assessment period was Day 1 - Day 14 for each treatment period.

Safety was assessed through serious adverse event collection.

Change From Baseline in the Psoriasis Area and Severity Index (PASI)
The efficacy assessment period was baseline, Week 4, Week 8, and Week 12. Baseline was the day prior to randomization.

The change from baseline for PASI score was assessed on a 0 to 72 scale (0 = none, 72 = maximum severity). Mixed model for repeated measures (MMRM) analysis was performed using change from baseline as the dependent variable, baseline as a covariate, and visit as a factor.

Secondary Endpoints

Investigator Global Assessment (IGA) Score
From Day 1 to Day 90
Change From Baseline in Awake Cough Frequency Per Hour With Prior Treatment as a Factor
The efficacy assessment period was Day 14 for each treatment period. Baseline was Day 1 prior to dosing for each treatment period.
Change From Baseline in 24-hour Cough Frequency Per Hour With Prior Treatment as a Factor
The efficacy assessment period was Day 14 for each treatment period. Baseline was Day 1 prior to dosing for each treatment period.
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ADX-629 (125 mg twice daily)EXPERIMENTAL -
ADX-629 (250 mg twice daily)EXPERIMENTAL -
ADX-629EXPERIMENTAL -
PlaceboPLACEBO_COMPARATORSubjects will be randomized to receive matching placebo tablets administered orally twice a day for 14 days.
ADX-629 250 mg administered orally twice daily (BID) for approximately 12 weeks.EXPERIMENTAL -
ADX-629 300 mg administered orally twice daily (BID) for up to 28 days.EXPERIMENTAL -
Placebo administered orally BID for up to 28 days.PLACEBO_COMPARATOR -
ADX-629, 600 mg administered orally twice daily (PO bid) for a minimum of 1 weekEXPERIMENTAL -
Placebo, 600 mg administered orally twice daily (PO bid) for minimum 1 weekPLACEBO_COMPARATOR -
ADX-629 Oral TabletsEXPERIMENTAL -

Interventions

NameTypeDescription
ADX-629DRUG125 mg twice daily for 28 days
ADX-629 (Open-label)DRUGADX-629 (250 mg) administered twice daily for 90 days
PlaceboDRUGSubjects will be randomized to receive both ADX-629 and placebo in one of two treatment sequences: One group of subjects will receive ADX-629 during the 1st treatment period and matching placebo during the 2nd Treatment while subjects the other sequence/group will receive the matching placebo in the 1st treatment period and ADX-629 in the 2nd treatment period.
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Eligibility Criteria

Age Range21 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: * Adult ≥ 21 years old on the day of signing the informed consent form; * Clinical diagnosis of alcoholic hepatitis, based on clinical features and laboratory testing, confirmed by the Investigator at screening * Agreement to abstain from alcohol and utilize resources to cease a...

Countries:United StatesCanada
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Recent Changes (Last 90 Days)

MEDIUMJul 4, 2026NCT06685692TRIAL_REMOVED: changed
MEDIUMJul 4, 2026NCT06685692TRIAL_REMOVED: changed
MEDIUMJul 4, 2026NCT06685692TRIAL_REMOVED: changed

Frequently asked questions about ADX-629

What is ADX-629 used for?

ADX-629 is an investigational small molecule being studied for multiple conditions, including ethanol intoxication, COVID-19, atopic dermatitis, chronic cough, atopic asthma, and alcohol hepatitis. It is developed by Aldeyra Therapeutics and is currently in Phase 2 clinical development.

What does ADX-629 target?

ADX-629 is a small molecule, but its specific molecular target has not been disclosed. It is being evaluated for its safety and efficacy in several inflammatory and metabolic conditions, including chronic cough and atopic dermatitis.

Who makes ADX-629?

ADX-629 is developed by Aldeyra Therapeutics, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol ALDX. The company is conducting clinical trials to evaluate the drug's safety and efficacy across multiple indications.

What phase is ADX-629 in?

ADX-629 is in Phase 2 clinical development. It has completed several trials, including a Phase 2 study for chronic cough and a Phase 1 study for ethanol intoxication. It is not yet approved by the FDA and remains investigational.

What clinical trials is ADX-629 in?

ADX-629 has completed four clinical trials: NCT04847544 for COVID-19 (Phase 2, 11 participants), NCT05392192 for chronic cough (Phase 2, 51 participants), NCT05487404 for ethanol intoxication (Phase 1, 26 participants), and NCT05717920 for atopic dermatitis (Phase 2, 8 participants). All trials were conducted in the United States.

Is ADX-629 the same as any other drug?

No alternative names for ADX-629 have been reported. It is identified solely by its code name ADX-629 in clinical trials and by its developer, Aldeyra Therapeutics.