A Phase 2 interventional study of DDY391 in Moderate to Severe Psoriatic Arthritis, sponsored by Novartis Pharmaceuticals. Not yet recruiting. Open to participants aged 18 Years to 100 Years. Per ClinicalTrials.gov, last updated 2026-11-06.
Sponsored by Novartis Pharmaceuticals (part of Novartis) · Phase 2, Interventional, and Treatment
The purpose of this 1-year open-label extension study is to characterize the longer-term safety and tolerability of DDY391 and to assess the durability of clinical response in participants with Psoriatic Arthritis (PsA) who have completed treatment in the CDDY391A12201 core study.
This is a 1-year open label extension (OLE) for participants who completed study treatment in CDDY391A12201 core study. Eligible participants include adults with moderate to severe PsA enrolled in part A or B of the core study who had an inadequate response and/or intolerance to biologic disease-modifying antirheumatic drugs (bDMARDs), as well as biologic-naïve participants with an inadequate response and/or intolerance to at least one conventional synthetic DMARD.
Participants must not meet any core study treatment discontinuation criteria at OLE enrollment.
There will be no screening period in this trial. The OLE baseline visit will coincide with Week 12/EOT for Part A and Week 24/EOT for Part B.
Eligible participants will receive open-label DDY391 for up to 52 weeks, followed by a 30-day safety follow-up. The total study duration is 56 weeks.
600 studies on the registry are indexed under Arthritis, Psoriatic; 129 are open to participants now.
This study's planned enrollment of 88 is below the median of 145 across 336 interventional studies indexed under Arthritis, Psoriatic.
Browse Arthritis, Psoriatic studies →Novartis Pharmaceuticals is the lead sponsor of 2,718 studies on the registry; 221 are open to participants now.
Of its 585 completed or terminated interventional studies of FDA-regulated products, 438 (75%) have results posted.
Counted across the registry records on this site, refreshed daily.
Key Inclusion Criteria:
Key Exclusion Criteria:
Other protocol-defined inclusion/exclusion criteria may apply.
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Live vaccines
Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive DDY391
Drug: DDY391
DDY391
Incidence and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs)
Number of participants with AEs and SAEs, including changes in vital signs, electrocardiograms (ECGs) and laboratory values qualifying and reported as AEs.
Time frame: Up to 56 Weeks
No study locations are listed for this record.
Plan to share: Yes — Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com
No publications or documents are linked to this record.
Start is estimated for Feb 2027; primary completion for Dec 2029, 34 months later.
Of 34 phase 2 interventional studies under Arthritis, Psoriatic, half reached primary completion within 19 months of starting (the median), counting those still running; a quarter within 13 and three quarters within 31. This study's planned 34 months is above that.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is not yet recruiting, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Studies of the drug tested here: DDY391