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Ulcerative ColitisApril 2023Summary reviewed August 2026

83% of Severe Colitis Patients Got Better With This Two-Drug Combo

Patients with moderate to severe ulcerative colitis received either two antibody drugs together or one alone. After 12 weeks, 83% of those on the combination improved, compared to 61% on one drug and 75% on the other. The combination group had better symptom relief and lower inflammation scores.

What the trial was testing

The VEGA enrolled 214 patients with ulcerative colitis. The study was sponsored by Janssen Research & Development, LLC and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was initial testing (phase 2). 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

83% of patients on the combination therapy improved after 12 weeks, compared to 61% on one drug alone.

The lancet. Gastroenterology & hepatology · 2023 · NCT03662542

These findings — that patients on two antibodies together had better symptom relief than those on one drug — were published in the The lancet. Gastroenterology & hepatology and represent the headline result of the study.

Researchers tracked outcomes across 214 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 ulcerative colitis, 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

This mid-stage study tested combining two antibody injections for ulcerative colitis. The combination worked better than either drug alone, with more patients seeing reduced bleeding and inflammation. Neither treatment is FDA-approved as a combination yet. If you're struggling with current therapies, ask your doctor about combination approaches or open trials testing new options.

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.