Testing lower doses of JAK inhibitors in people with inflammatory arthritis
Compares lowering the dose of JAK inhibitors with keeping the same dose in arthritis patients.
Plain-language title generated from the registry record
Registry title: REDO-JAK: Dose Reduction of Janus Kinase Inhibitors in Patients With Inflammatory Rheumatic Diseases
Key facts
- Where
- Amsterdam, Enschede, Harderwijk, Maastricht, Nijmegen, Rotterdam, Tilburg, Ubbergen, Uden, and Zwolle, NetherlandsSee the 11 sites
- Phase
- Phase 4
AI summary: who the study is looking for
From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.
The trial is looking for adults and teenagers with rheumatoid arthritis, psoriatic arthritis or axial spondyloarthritis. They take a JAK inhibitor and their disease has been quiet for at least 6 months. It tests lowering the dose against keeping the same dose.
- Age
- 16 years or older
- Sex
- All sexes
- Disease stage
- Low disease activity or remission for at least 6 months. RA: DAS28-CRP < 2.9. PsA: PASDAS ≤3.2 and psoriasis mBSA involvement ≤3%. axSpA: ASDAS <2.1.
- Earlier treatment
- Currently treated with a JAK inhibitor, alone or with a csDMARD, at a dose of at least 50% of the authorised dose.
Main reasons for not taking part
- Another illness that will probably need continued JAK inhibitor treatment (for example active Crohn's disease or ulcerative colitis)
- Life expectancy of 12 months or less
- Pregnancy
- Taking part in another trial that might interfere
- Not able to give informed consent
Read by machine on 9 November 2026.
Where in Netherlands
- Reade revalidatie & reumatologie centrum te AmsterdamAmsterdam, NetherlandsTaking people
- Medisch Spectrum TwenteEnschede, NetherlandsTaking people
- Ziekenhuis St JansdalHarderwijk, NetherlandsTaking people
- Maastricht University Medical CenterMaastricht, NetherlandsTaking people
- Radboud universitair medisch centrum StichtingNijmegen, NetherlandsTaking people
- Erasmus Universitair Medisch Centrum Rotterdam (Erasmus MC)Rotterdam, NetherlandsTaking people
- Maasstad Ziekenhuis StichtingRotterdam, NetherlandsTaking people
- Elisabeth-Tweesteden ZiekenhuisTilburg, NetherlandsTaking people
- Sint Maartenskliniek StichtingUbbergen, NetherlandsTaking people
- Bernhoven B.V.Uden, NetherlandsTaking people
- Isala Klinieken StichtingZwolle, NetherlandsTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- Sint Maartenskliniek
- Trial code
- NCT07160231EU 2025-520757-36-00
- Record updated
- 17 September 2025
- Original description
The goal of this clinical trial is to assess the effectiveness of a disease activity guided dose reduction strategy of Janus kinase inhibitor (JAKi) compared to disease activity guided JAKi continuation in patients with rheumatoid arthritis (RA), psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA) who are in a state of low disease activity or remission while on JAKi. The main question it aims to answer is:Read full original descriptionShow less
REDO-JAK: Dose REDuction Of JAnus Kinase Inhibitors in Patients With Inflammatory Rheumatic Diseases
The goal of this clinical trial is to assess the effectiveness of a disease activity guided dose reduction strategy of Janus kinase inhibitor (JAKi) compared to disease activity guided JAKi continuation in patients with rheumatoid arthritis (RA), psoriatic arthritis (PsA) and axial spondyloarthritis (axSpA) who are in a state of low disease activity or remission while on JAKi. The main question it aims to answer is:
Is a disease activity guided dose reduction strategy for JAKi not inferior in terms of efficacy compared to disease activity guided JAKi continuation in patients with RA/PsA/axSpA that are currently in a low disease activity/remission state?
Researchers will compare a disease activity guided dose reduction strategy for JAKi to disease activity guided JAKi continuation in patients with RA/PsA/axSpA that are currently in a low disease activity/remission state to see if a disease activity guided dose reduction strategy for JAKi is not inferior in terms of efficacy compared to disease activity guided JAKi continuation.
Participants will:
* Follow a JAKi dose reduction strategy or will continue using JAKi in the same dose * Study (telemonitoring) visits are planned every 3 months * At every visit, patients are asked to complete patient-reported outcomes that assess daily functioning, health-related quality of life, pain, fatigue, productivity loss, medical consumption and medication adherence.
Inclusion: Patients ≥ 16 years of age; Clinical diagnosis of RA, PsA or axSpA; Treated with a JAKi (monotherapy or combination with csDMARDwith a JAKi dose ≥ 50% of the authorised dose); LDA or remission for at least 6 months according to accepted criteria for the specific disease and/or the judgement of the treating rheumatologist and patient. (RA: DAS28-CRP < 2.9; PsA: PASDAS ≤3.2 and psoriasis mBSA involvement ≤3%; axSpA: ASDAS <2.1.).
Exclusion: Comorbidity for which continued JAKi treatment is expected to be necessary (e.g. active Crohn's disease, ulcerative colitis); Life expectancy ≤12 months; Pregnancy (JAKi are contra-indicated during pregnancy, therefore we do not expect patients using a JAKi while pregnant); Patients who are enrolled in other trials that might mutually interfere; Not able to provide informed consent.