Chronic spontaneous urticaria (CSU) remains difficult to manage in patients refractory to antihistamines and omalizumab. Although dupilumab has recently been approved and incorporated into international guidelines, real-world evidence remains limited, particularly in treatment-refractory populations. We conducted a multicentre ambispective cohort study across 16 Spanish hospitals including adults with CSU, with or without concomitant chronic inducible urticaria, treated with dupilumab and followed for ≥4 weeks. The primary outcome was well-controlled disease within 24 weeks (Urticaria Control Test ≥12 and Urticaria Activity Score over 7 days≤6). Fiftyone patients were included; 92.0% had previously received omalizumab. At week 24, 69.7% (23/33) achieved well-controlled disease and 39.4% (13/33) complete control. Among patients with available week-52 data, 90.5% (19/21) and 61.9% (13/21), respectively, achieved these outcomes. Concomitant therapy use declined from 94.1% at baseline to 55.6% at week 52. Among omalizumab-experienced patients evaluable at week 24, dupilumab response was lower in prior nonresponders than in those with at least partial response to omalizumab (40% vs 85%, p=0.011). Atopic comorbidities were associated with greater UAS7 reduction (p=0.018). Dupilumab was well tolerated, with mostly mild adverse events. In routine clinical practice, dupilumab provides effective disease control in patients with difficult-totreat CSU, including most omalizumab-experienced individuals.
Planella‐Fontanillas et al. (Mon,) studied this question.