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ADX-629

Phase 2

Alcohol Hepatitis | Small molecule | Gastrointestinal |Aldeyra Therapeutics, Inc.|Trials Updated: Jun 3, 2026

Development status

Highest phase Phase 2
Registered trials 7 across 1 sponsor since Jan 2021

Target and mechanism

ModalitySmall molecule

Also known as ADX-629 (Open-label)

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials7
Total Enrollment118

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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Frequently asked questions about ADX-629

What is ADX-629?

ADX-629 is an investigational small molecule developed by Aldeyra Therapeutics, Inc. (ticker ALDX). It is being studied in several conditions, including alcohol associated hepatitis, atopic asthma, atopic dermatitis, chronic cough, COVID-19, and ethanol intoxication. It is a Phase 2 clinical-stage candidate and has not been approved by the FDA.

What is ADX-629 used for in alcohol associated hepatitis?

ADX-629 is being studied as a treatment for alcohol associated hepatitis. A completed Phase 2 trial, NCT06685692, evaluated the safety and efficacy of ADX-629 in subjects with alcohol associated hepatitis in the United States. The trial enrolled 4 participants aged 21 years and older and was conducted in the United States.

Who makes ADX-629?

ADX-629 is developed by Aldeyra Therapeutics, Inc., which trades on the Nasdaq under the ticker ALDX. The company is the sponsor of the clinical program studying ADX-629 across multiple inflammatory and immune-related conditions, including alcohol associated hepatitis, atopic dermatitis, chronic cough, and ethanol intoxication.

What phase is ADX-629 in?

ADX-629 is in Phase 2 clinical development. It is an investigational small molecule and has not been approved by the FDA. Completed studies include Phase 2 trials in alcohol associated hepatitis, atopic dermatitis, and chronic cough, as well as a Phase 1 trial in subjects with elevated ethanol levels.

What clinical trials is ADX-629 in?

ADX-629 has been studied in completed trials including NCT06685692 in alcohol associated hepatitis, NCT05717920 in atopic dermatitis, NCT05487404 in ethanol intoxication, and NCT05392192 in chronic cough. These trials were conducted in the United States. The chronic cough trial, NCT05392192, enrolled 51 participants, the largest of the group.

Is ADX-629 the same as ADX-629 (Open-label)?

Yes, ADX-629 (Open-label) refers to the same investigational small molecule, ADX-629, developed by Aldeyra Therapeutics, Inc. (ticker ALDX). The open-label designation describes the trial design used in some of the completed studies, not a different drug candidate. Both names refer to the same Phase 2 asset.