Last Update: Dec 01, 2023
A Global, Multicenter, Randomized, Double-blind, Double-dummy, Parallel-group, Phase 3b Study to Assess the Efficacy, Safety, and Tolerability of Remibrutinib 25 mg b.i.d. in Comparison to Placebo With Omalizumab 300 mg Every 4 Weeks as Active Control Over 52 Weeks in Adult Patients With Chronic Spontaneous Urticaria Inadequately Controlled by Second-generation H1-antihistamines Identifier:
Novartis Reference Number:CLOU064A2304
All compounds are either investigational or being studied for (a) new use(s). Efficacy and safety have not been established. There is no guarantee that they will become commercially available for the use(s) under investigation.

Study Description

The purpose of this trial is to assess the efficacy, safety and tolerability of remibrutinib (LOU064) 25 milligrams (mg) twice a day (b.i.d.) over placebo for 24 weeks and in comparison to omalizumab 300 mg every 4 weeks (q4w) for 52 weeks in participants with chronic spontaneous urticaria (CSU) inadequately controlled by H1-antihistamines (H1-AH).

Chronic Spontaneous Urticaria
Phase 3
Nov 24, 2023
Jun 23, 2026
18 Years - (Adult, Older Adult)




Active comparator

Placebo to omalizumab

Placebo followed by active comparator

Placebo to remibrutinib

Placebo followed by active treatment


Active treatment

Eligibility Criteria

Inclusion Criteria:

Male and female adult participants ≥18 years of age at the time of signing the informed consent.
CSU duration for ≥ 6 months prior to screening.
Diagnosis of CSU inadequately controlled by second generation H1-AH at the time of randomization, defined as:
The presence of itch and hives for ≥6 consecutive weeks prior to screening, despite the use of second-generation H1-AH during this time period.
UAS7 score (range 0-42) ≥16, ISS7 score (range 0-21) ≥ 6 and HSS7 score (range 0- 21) ≥ 6 during the 7 days prior to randomization (Day 1).
Documentation of hives within three months before randomization.
Willing and able to complete an Urticaria Patient Daily Diary (UPDD) for the duration of the study and adhere to the study protocol.
Participants must not have had more than one missing UPDD entry (either morning or evening) in the 7 days prior to randomization (Day 1).

Exclusion Criteria:

Prior exposure to ligelizumab, omalizumab and other biologics with any effect in CSU, including anti-IgE therapies.
Significant bleeding risk or coagulation disorders.
History of gastrointestinal bleeding.
Requirement for anti-platelet or anti-coagulant medication.
History or current hepatic disease.
Evidence of clinically significant cardiovascular, neurological, psychiatric, pulmonary, renal, hepatic, endocrine, metabolic, hematological disorders, gastrointestinal disease or immunodeficiency that, in the investigator's opinion, would compromise the safety of the participant, interfere with the interpretation of the study results or otherwise preclude participation or protocol adherence of the participant.
Evidence of helminthic parasitic infection as evidenced by stools being positive for a pathogenic organism according to local guidelines.
Documented history of anaphylaxis.

Study Location

Novartis Investigative Site



Novartis Investigative Site



Novartis Investigative Site



Novartis Investigative Site



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