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Nemolizumab Q4W improves IGA success maintenance by 11.8% over withdrawal in atopic dermatitisTrial shows nemolizumab maintains skin results for atopic dermatitis

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Key Takeaway
Note that nemolizumab Q4W or Q8W maintains skin responses significantly better than withdrawal in atopic dermatitis.

This Phase 3 randomized controlled trial assessed the maintenance of skin responses in 507 adolescents and adults with moderate-to-severe atopic dermatitis who were clinical responders at Week 16. Participants received either nemolizumab 30 mg Q4W, nemolizumab 30 mg Q8W, or a withdrawal (placebo) regimen, all alongside background topical therapy.

At Week 48, the primary outcomes showed significant differences in maintaining skin responses. Nemolizumab Q4W resulted in 61.5% IGA success and 76.3% EASI-75 maintenance. These figures represented an 11.8% difference and a 12.4% difference over the withdrawal group, respectively. The nemolizumab Q8W group showed 60.4% IGA success (a 10.7% difference vs withdrawal) and 75.7% EASI-75 maintenance (an 11.8% difference vs withdrawal).

Safety profiles were similar across all groups, with 53.5% to 58.3% of patients experiencing at least one adverse event. No notable differences in tolerability were observed between the Q4W and Q8W dosing regimens. While specific limitations were not reported, the study provides evidence for nemolizumab as a maintenance therapy for stable responders.

How this fits prior evidence

How this fits prior evidence: This finding addresses a gap in long-term management strategies for atopic dermatitis. While previous coverage noted that ultra-processed food consumption is associated with increased risk of allergic diseases, and other systemic treatments like upadacitinib showed promise for concurrent conditions, this study specifically evaluates the maintenance of response using nemolizumab in established responders.

Researchers conducted a Phase 3 clinical trial to see if the medication nemolizumab could help patients keep their skin clear over time. The study included 507 people, including both adolescents and adults, who had moderate to severe atopic dermatitis and were already showing improvement after 16 weeks of treatment.

The study compared two different dosing schedules for nemolizumab against a group that stopped taking the medication while continuing their usual topical creams. Patients receiving nemolizumab every four or eight weeks showed significantly higher rates of maintaining clear skin and reduced symptoms compared to those who stopped the drug. Specifically, more than 60% of patients on the nemolizumab plans maintained success at week 48.

The trial also found that nemolizumab helped manage itching and improved sleep for those with severe skin issues. Safety results showed no major differences in side effects between the different dosing groups. Because this was a large, controlled study, it provides strong evidence that nemolizumab can help maintain skin health over several months.

What this means for you:
Nemolizumab helps patients with atopic dermatitis maintain clear skin and reduced itching for up to 48 weeks.

Common questions

Who can benefit from this treatment?

This study specifically looked at adolescents and adults who have moderate to severe atopic dermatitis. The results are most relevant for patients who were already showing a positive response to their treatment by the 16-week mark of the study.

How long did the skin improvements last?

The trial followed patients for up to 48 weeks. Patients taking nemolizumab every four or eight weeks showed significantly higher rates of maintaining clear skin compared to those who stopped the medication while continuing their topical treatments.

Is it safe to use this medication?

The study reported that the safety profile was similar across both dosing groups. The percentage of patients experiencing at least one adverse event was between 53.5% and 58.3% in all groups, with no notable differences in tolerability between the different nemolizumab schedules.

Study Details

Study typeRct
Sample sizen = 507
EvidenceLevel 2
Follow-up7.4 mo
PublishedJun 2026
View Original Abstract ↓
Nemolizumab with background topical therapy (corticosteroids±calcineurin inhibitors) significantly improved skin lesions, itch and sleep in two global phase 3 trials (ARCADIA 1&2) in adolescents and adults with moderate-to-severe atopic dermatitis through week (W)16. Efficacy and safety of nemolizumab, combined with background topical therapy, were evaluated for an additional 32 weeks (W16-W48) with a focus on maintained skin responses in clinical responders (patients achieving Investigator's Global Assessment [IGA] score of 0/1 [clear/almost clear] or ≥75% improvement in Eczema Area and Severity Index [EASI-75] at W16). At W16, clinical responders (N=507) to nemolizumab every 4 weeks (Q4W) were rerandomized (1 : 1 : 1) to receive nemolizumab 30 mg-Q4W/-Q8W/placebo (nemolizumab-withdrawal) subcutaneously with background topical therapy. At W48, 61.5% (strata-adjusted difference versus nemolizumab-withdrawal group [Δ], 11.8% [95% CI 1.3-22.3]) and 76.3% (Δ, 12.4% [95% CI 2.7- 22.0]) of patients in nemolizumab-Q4W; 60.4% (Δ, 10.7% [95% CI 0.3-21.0]) and 75.7% (Δ, 11.8% [95% CI 2.1-21.5]) in nemolizumab-Q8W; and 49.7% and 63.9% in nemolizumab-withdrawal group maintained response rate for IGA success and EASI-75, respectively. The percentage of patients who experienced ≥1 adverse events were similar across the groups (range: 53.5%-58.3%). Up to W48, skin responses were maintained without notable differences in the safety profile of both nemolizumab dosing regimens.
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