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DDY391

Phase 2

Moderate to Severe Psoriatic Arthritis | Small molecule | Other |Novartis AG|Trials Updated: Oct 13, 2026

DDY391 development status

Highest phase Phase 2
Registered trials 2 across 1 sponsor since Jul 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment564

FDA Designations

No designations recorded

DDY391 clinical trials

DDY391 · 2 trials · 2 indications

Phase 2 2
NCT07801495A Study to Assess the Efficacy, Safety and Tolerability of DDY391 in Participants With Moderate to Severe Psoriatic ArthritisModerate to Severe Psoriatic Arthritis
RECRUITING220 Analytics
NCT07737743A Phase 2a/b Study to Assess the Efficacy, Safety and Tolerability of DDY391 in Participants With Sjögren's DiseaseSjögren's Disease
RECRUITING344 Analytics
PHASE2RECRUITING
A Study to Assess the Efficacy, Safety and Tolerability of DDY391 in Participants With Moderate to Severe Psoriatic Arthritis
Moderate to Severe Psoriatic ArthritisUnlock trial analytics
PHASE2RECRUITING
A Phase 2a/b Study to Assess the Efficacy, Safety and Tolerability of DDY391 in Participants With Sjögren's Disease
Sjögren's DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Part A: Number of participants achieving American College of Rheumatology 50 (ACR50) response
Week 12

To evaluate the efficacy of DDY391 versus placebo through achievement of ACR 50. ACR 50 is a validated tool for assessing RA disease activity.

Part A and B: Number of participants achieving American College of Rheumatology 50 (ACR50) response
Week 12

To demonstrate the dose-response relationship of DDY391 compared to placebo in bDMARD-IR participants.

Part A and B: Change from baseline in ESSDAI score
Baseline, Week 24

EULAR Sjögren's Syndrome Disease Activity Index (ESSDAI) is a validated tool for assessing disease activity in SjD. Score range is 0-123. Higher scores on the ESSDAI scale are associated with poorer health states. A negative change from baseline indicates improvement in disease status.

Part C: Change from baseline in ESSPRI
Baseline, Week 24

EULAR Sjögren's Syndrome Patient Reported Index (ESSPRI) is a validated disease outcome measure for SjD. It consists of three domains of dryness, pain, and fatigue. The participant will assess severity of symptoms they experienced over the last 14 days on a single 0-10 numerical rating scale for each of the three domains. The ESSPRI score is defined as the mean of scores from the three scales: (dryness + pain + fatigue) /3. The total ESSPRI score ranges from 0 (no symptoms) to 10 (maximal symptom severity).

Secondary Endpoints

Part B: Number of participants achieving American College of Rheumatology 50 (ACR50) response
Week 12
Part A and Part B: Incidence and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)
From first dose through Week 12
Part A and B: Change from baseline in ESSPRI
Baseline, Week 24
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part A: DDY391-Schedule 1 Dose AEXPERIMENTALParticipants will receive DDY391 Schedule 1 Dose A.
Part A: Placebo Schedule 1PLACEBO_COMPARATORParticipants will receive matching placebo Schedule 1.
Part B: DDY391- Schedule 1 Dose AEXPERIMENTALParticipants will receive DDY391 Schedule 1 Dose A. Based on treatment response, participants will then either continue receiving DDY391 or switch to local standard of care (SOC).
Part B: DDY391- Schedule 1 Dose BEXPERIMENTALParticipants will receive DDY391 Schedule 1 Dose B. Based on treatment response, participants will then either continue receiving DDY391 or switch to local SOC.
Part B: DDY391- Schedule 1 Dose CEXPERIMENTALParticipants will receive DDY391 Schedule 1 Dose C. Based on treatment response, participants will then either continue receiving DDY391 or switch to local SOC.
Part B: Placebo Schedule 1EXPERIMENTALParticipants will receive matching placebo Schedule 1. Based on treatment response, participants will then either switch to DDY391 Schedule 1 Dose A or receive local SOC.
Part B: DDY391- Schedule 2 Dose CEXPERIMENTALParticipants will receive DDY391 Schedule 2 Dose C. Based on treatment response, participants will then either switch to DDY391 Schedule 1 Dose A or receive local SOC.
Part B: Placebo Schedule 2EXPERIMENTALParticipants will receive matching placebo Schedule 2. Based on treatment response, participants will then either switch to DDY391 Schedule 1 Dose A or receive local SOC.
Part A- DDY391 dose level 1EXPERIMENTALDDY391 dose level 1
Part A-PlaceboEXPERIMENTALMatching placebo. At the Week 24 visit, all participants will be randomized to DDY391 dose level 1 or dose level 2.
Part B- DDY391 dose level 1EXPERIMENTALDDY391 dose level 1
Part B- DDY391 dose level 2EXPERIMENTALDDY391 dose level 2
Part B- DDY391 dose level 3EXPERIMENTALDDY391 dose level 3
Part B- PlaceboEXPERIMENTALMatching placebo. At the Week 24 visit, all participants will be randomized to DDY391 dose level 1 or dose level 2.
Part C- DDY391 dose level 1EXPERIMENTALDDY391 dose level 1
Part C- PlaceboEXPERIMENTALMatching placebo. At the Week 24 visit, all participants will be randomized to DDY391 dose level 1 or dose level 2.

Interventions

NameTypeDescription
DDY391DRUGDDY391
PlaceboDRUGMatching placebo
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Eligibility Criteria

Age Range18 Years to 100 Years
SexALL
Healthy VolunteersNo
Study Sites3

Key Inclusion Criteria: * Female or male participants at least 18 years of age. * Diagnosis of PsA and meeting classification criteria for Psoriatic arthritis (CASPAR) at screening. * Moderate to severe PsA at screening and baseline. Key Exclusion Criteria: * Presence of inflammatory conditions o...

Countries:United StatesAustraliaCanadaChinaIsrael
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Recent Changes (Last 90 Days)

LOWOct 13, 2026NCT07801495lastUpdatePostDate: changed
LOWOct 13, 2026NCT07737743lastUpdatePostDate: changed
LOWOct 13, 2026NCT07801495lastUpdatePostDate: changed
LOWOct 13, 2026NCT07737743lastUpdatePostDate: changed
LOWSep 25, 2026NCT07801495lastUpdatePostDate: changed
LOWSep 25, 2026NCT07737743lastUpdatePostDate: changed
LOWSep 25, 2026NCT07801495lastUpdatePostDate: changed
LOWSep 25, 2026NCT07737743lastUpdatePostDate: changed
LOWSep 17, 2026NCT07801495Status: NOT_YET_RECRUITING → RECRUITING
LOWSep 17, 2026NCT07801495Status: NOT_YET_RECRUITING → RECRUITING
LOWSep 9, 2026NCT07737743lastUpdatePostDate: changed
LOWSep 9, 2026NCT07737743lastUpdatePostDate: changed
LOWSep 4, 2026NCT07737743Status: NOT_YET_RECRUITING → RECRUITING
LOWSep 4, 2026NCT07737743Status: NOT_YET_RECRUITING → RECRUITING
LOWSep 3, 2026NCT07801495NEW_TRIAL: changed
LOWSep 3, 2026NCT07801495NEW_TRIAL: changed
LOWJul 30, 2026NCT07737743NEW_TRIAL: changed
LOWJul 30, 2026NCT07737743NEW_TRIAL: changed

Frequently asked questions about DDY391

What is DDY391?

DDY391 is an investigational small molecule being developed by Novartis AG for moderate to severe psoriatic arthritis and Sjögren's disease. It is currently in Phase 2 clinical development and has not been approved by the FDA. Both programs are actively recruiting participants in randomized, double-blind, placebo-controlled trials.

What is DDY391 used for?

DDY391 is being studied for the treatment of moderate to severe psoriatic arthritis and Sjögren's disease. Both are immune-mediated conditions, and the drug is in Phase 2 development for each indication. It is investigational and has not received regulatory approval for any use.

Who is developing DDY391?

DDY391 is being developed by Novartis AG, which trades on the New York Stock Exchange under the ticker NVS. Novartis is running the clinical program, including a Phase 2 psoriatic arthritis trial and a Phase 2a/b Sjögren's disease trial.

What phase is DDY391 in?

DDY391 is in Phase 2 clinical development. Novartis is running a Phase 2 study in moderate to severe psoriatic arthritis and a Phase 2a/b study in Sjögren's disease. The drug is investigational and has not been approved by the FDA.

What clinical trials is DDY391 in?

DDY391 is being evaluated in two recruiting trials. NCT07801495 is a Phase 2 study in moderate to severe psoriatic arthritis enrolling 220 participants in the United States. NCT07737743 is a Phase 2a/b study in Sjögren's disease enrolling 344 participants across the United States, Australia, Canada, China, and Israel.

How is DDY391 administered in its trials?

DDY391 is a small molecule given as a systemic therapy in its clinical trials. Both the psoriatic arthritis and Sjögren's disease studies are randomized, double-blind, and placebo-controlled, enrolling adults 18 years and older. The trials do not select participants based on a biomarker.