Chronic Idiopathic Urticaria | Efficacy and Safety of Chemoattractant Receptor-homologous Molecule Expressed on T Helper Type 2 (CRTh2) Antagonist AZD1981 in Chronic Idiopathic Urticaria (CIU) Antihistamines

Chronic Idiopathic Urticaria research study

What is the primary objective of this study?

The investigators are recruiting for a chronic hives study. This research is being done to test whether an investigational drug called AstraZeneca drug (AZD)1981 may be helpful for treating people with Chronic Idiopathic Urticaria who continue to have symptoms despite taking antihistamines. The word \"investigational\" means that AZD1981 is not approved for marketing by the Food and Drug Administration (FDA). The FDA is allowing the use of AZD1981 in this study. People with chronic hives lasting for at least 6 months and without a known cause may join. The study involves 6 visits over 8 weeks. Approximately 48 participants expected to take part in this study at the Johns Hopkins Asthma and Allergy Clinic. All participants will be treated with the study medication and/or placebo for 8 weeks. The results of this trial may have a benefit others with Chronic Idiopathic Urticaria who don't respond well to antihistamines by generating experience and data to support the design of a larger, multicenter trial investigating the efficacy of AZD1981 in treating antihistamine refractory CIU.

Who is eligible to participate?

Inclusion Criteria: - Females must be surgically sterile or postmenopausal or using a highly effective form of birth control throughout the duration of the study - Females must have a negative urine pregnancy test at screening - Must meet the criteria for Chronic Idiopathic Urticaria (CIU) as defined by itching and hives for >3 days per week for over 6 weeks with no clear cause - CIU symptoms must have started at least 6 months prior to starting the study - Must have moderate to severe CIU, using a standardized survey, despite taking antihistamines Exclusion Criteria - Pregnant females or females who plan to become pregnant during the study - Drug or alcohol abuse within the past 3 years - Use of any investigational drug with 30 days of the start of the study - Eczema or other skin conditions associated with itching (besides hives) - Inability to comply with follow-up procedures - Use of the following therapies in the past 30 days: hydroxychloroquine, sulfasalazine, dapsone, methotrexate, cyclophosphamide, Intravenous Immunoglobulin (IVIG), plasmapheresis, cyclosporine, oral or systemic steroids, or other monoclonal antibody therapies - Use of doxepin within the past 2 weeks - Use of either H2 antihistamines and leukotriene receptor antagonists within 7 days before starting the study (unless already on these medications for Gastroesophageal Reflux Disease (GERD), asthma or allergic rhinitis) - Inability to take diphenhydramine (Benadryl) - Past or current medical problems or findings from physical examination or laboratory testing that are not listed above, which, in the opinion of the investigator, may pose additional risks or interfere with ability to comply with study procedures.

Which medical condition, disease, disorder, syndrome, illness, or injury is researched?

Chronic Idiopathic Urticaria

Study Interventions

Interventions can include giving participants drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available or noninvasive approaches such as surveys, education, and interviews.

Drug:AZD1981AZD1981 is an oral, potent, selective, reversible antagonist of CRTh2 (Chemoattractant Receptor Homologous Molecule expressed on Th2 cells).

Drug:PlaceboSugar pill manufactured to mimic AZD1981 10 mg tablet

Study Arms

Research studies and clinical trials typically have two or more research arms. An arm is a group of people who receive the same treatment in the study.

AZD1981AZD1981 for oral administration will be available in tablet form. AZD1981 tablets will be provided in 10 mg strengths. The drug will be self-administered by the subject. Subjects will take 4 tablets in the morning, 4 tablets in the afternoon, and 4 tablets in the evening. The tablets should be swallowed whole with a glass of water.

PlaceboThe placebo will be available in tablet form. The placebo contains the same ingredients as the AZD1981 with the exception of the active compound. The placebo will be self-administered by the subject. Subjects will take 4 tablets in the morning, 4 tablets in the afternoon, and 4 tablets in the evening. The tablets should be swallowed whole with a glass of water.

Study Status


Start Date: January 2014

Completed Date: January 2016

Phase: Phase 2

Type: Interventional


Primary Outcome: The Change in Diary-based Clinical Symptoms as Measured by the Urticaria Activity Score 7 (UAS7)

Secondary Outcome: The Number of Participants With Adverse Events

Study sponsors, principal investigator, and references

Principal Investigator: Sarbjit S Saini, MD

Lead Sponsor: Johns Hopkins University

Collaborator: AstraZeneca

More information:

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