Overview
The purpose of this study is to evaluate the efficacy and safety of TAS5315 in chronic spontaneous urticaria patients with an inadequate response to H1-antihistamines
Description
The main purpose of this study is to assess the efficacy of TAS5315 in chronic spontaneous urticaria patients with an inadequate response to H1-antihistamines compared with placebo as measured by the change from baseline in weekly Urticaria Activity Score (UAS7) at week 12
Eligibility
Key Inclusion Criteria:
- Aged 18 to 75 years
- Diagnosis of chronic spontaneous urticaria (CSU)
- Presence of itch and hives for at least 6 consecutive weeks prior to screening in spite of use of non-sedating H1-antihistamines for CSU
- UAS7 score ≥ 16 and HSS7 score ≥ 8 during 7 days prior to study entry
- In-clinic UAS ≥ 4 on study entry
- Willing and able to complete and Participate Daily for the duration of the study
Key Exclusion Criteria
- Diseases other than CSU with symptoms of urticaria or angioedema, including urticarial vasculitis, erythema multiforme, mastocytosis, or hereditary or acquired angioedema
- Atopic dermatitis, psoriasis, ichthyosis, or other skin disease associated with chronic itching
- Bleeding diathesis
- Uncontrolled hypertension disease states
- Treatment with omalizumab or other humanized anti-human IgE monoclonal antibody therapies used to treat CSU within 4 months prior to screening
- Nonresponse to omalizumab or other humanized anti-human IgE monoclonal antibody therapies
- Have been treated with other Bruton's Tyrosine Kinase inhibitors
- Pregnant or lactating women