Oral TYK2 Inhibition in Atopic Dermatitis
Phase 2 trial evaluated once-daily oral TYK2 inhibition in adults with moderate to severe AD.
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By
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Kathryn Wighton
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February 5, 2026
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Clinical Scorecard: Oral TYK2 Inhibition in Atopic Dermatitis
At a Glance
| Category | Detail |
| Condition | Atopic Dermatitis |
| Key Mechanisms | TYK2 inhibition |
| Target Population | Adults aged 18 to 75 years with moderate to severe atopic dermatitis |
| Care Setting | Clinical trial across 19 centers in China |
Key Highlights
- ICP-332 showed significant reduction in Eczema Area and Severity Index scores over 4 weeks.
- 64% of patients achieved Eczema Area and Severity Index 75 response with ICP-332 vs 8% with placebo.
- Improvements in pruritus observed as early as day 2 of treatment.
- No serious adverse events reported; most adverse events were mild or moderate.
- Study supports further phase 3 trials for ICP-332 in atopic dermatitis.
Guideline-Based Recommendations
Diagnosis
- Diagnosis of atopic dermatitis for at least 1 year.
- Eczema Area and Severity Index score of 16 or higher.
Management
- Consider ICP-332 for patients with inadequate response to topical corticosteroids or calcineurin inhibitors.
Monitoring & Follow-up
- Monitor for treatment-emergent adverse events, particularly blood fibrinogen levels.
Risks
- Increased incidence of mild to moderate adverse events in ICP-332 groups.
Patient & Prescribing Data
Adults with moderate to severe atopic dermatitis, documented history of inadequate response to topical treatments.
Oral ICP-332 demonstrated efficacy and a favorable benefit-risk profile.
Clinical Best Practices
- Consider patient history of treatment response when prescribing.
- Monitor patients closely for adverse events during treatment.
References