Summary: Multi-center, open-label roll-over post-trial access protocol to provide remibrutinib treatment and collect long-term safety for up to three years for participants who are currently receiving remibrutinib treatment in a Novartis-sponsored study, who are benefiting from treatment with remibrutinib, and are unable to access remibrutinib treatment outside of a clinical study.

Summary: The purpose of this trial is: 1. to assess the efficacy, pharmacokinetics, and safety of remibrutinib vs. placebo in adolescents from 12 to \< 18 years of age suffering from chronic spontaneous urticaria inadequately controlled by H1-antihistamines 2. to collect long-term efficacy, safety and tolerability data on remibrutinib in adolescents after having completed 24 weeks of treatment 3. to collec...

Summary: This is a US, multi-center, randomized, double-blind, double-dummy, Phase 3b study to evaluate efficacy of remibrutinib (25 mg twice daily \[b.i.d.\] by mouth \[p.o.\]) compared to dupilumab (600 mg loading dose administered subcutaneously (s.c.) followed by 300 mg every 2 weeks s.c.) at early timepoints (4 weeks and earlier), when administered as an add-on treatment to second generation H1-antihi...