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Rheumatoid ArthritisApril 2023Summary reviewed August 2026

Lower Methotrexate Dose Worked as Well as High Dose for Rheumatoid Arthritis

Patients with rheumatoid arthritis took adalimumab (an injection) combined with either a reduced or maximum dose of methotrexate (a pill). About 40% in each group achieved remission. The lower dose worked just as well and caused fewer side effects.

What the trial was testing

The MIRACLE enrolled 300 patients with rheumatoid arthritis. The study was sponsored by Keio University and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was long-term safety (phase 4). Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

38% of patients on the lower dose achieved remission, matching the 44% on the higher dose.

The Lancet. Rheumatology · 2023 · NCT03505008

These findings — that lower and higher methotrexate doses worked equally well when combined with adalimumab — were published in the The Lancet. Rheumatology and represent the headline result of the study.

Researchers tracked outcomes across 300 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with rheumatoid arthritis, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

If you take adalimumab and methotrexate together for rheumatoid arthritis, this study suggests a lower methotrexate dose might work just as well as a higher one — and may cause fewer side effects. Both drugs are FDA-approved for rheumatoid arthritis. Talk to your rheumatologist about whether a lower dose makes sense for you.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.