> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/phase-2a-study-to-assess-the-efficacy-and-safety-of-azd4604-2c903910-2a97-4a16-bcac-d212813fa119 > Record changed: 2026-10-13 # Phase 2a Study to Assess the Efficacy and Safety of AZD4604 in Adult Patients With Moderate-to-Severe Asthma Uncontrolled on Medium-High Dose ICS-LABA NCT06020014 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) Phase Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) Recruitment status Completed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) Participants 339 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) Lead sponsor AstraZeneca Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) Start date 2023-11-16 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) Number of sites 124 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Title and summary **Summary** This is a Phase 2a, multicentre, randomised, placebo-controlled, double-blind, parallel-group study to evaluate the efficacy, safety and PK of AZD4604 administered BID using a dry-powder inhaler at one dose level over a 12-week Treatment period in adult participants with uncontrolled moderate-to-severe asthma. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Acronym** AJAX Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Short title** Phase 2a Study to Assess the Efficacy and Safety of AZD4604 in Adult Patients With Moderate-to-Severe Asthma Uncontrolled on Medium-High Dose ICS-LABA Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Official title** A Phase 2a Randomised, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of AZD4604 Twice Daily for Twelve Weeks in Adult Patients With Moderate-to-Severe Asthma Uncontrolled on Medium-High Dose ICS-LABA Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Status and phase **Control arm** Placebo Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Recruitment status** Completed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Phase** Phase 2 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Dates **Completion date** 2025-10-28 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **First posted** 2023-08-31 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Registry last updated** 2025-11-13 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Primary completion date** 2025-10-28 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Start date** 2023-11-16 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Size and sites **Actual participants** 339 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Participants** 339 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Participant count basis** Actual Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Protocol amendments** 6 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Number of sites** 124 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Sponsor and oversight **Data monitoring committee** Yes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Lead sponsor** AstraZeneca Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Identifiers **Registry ID** NCT06020014 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **ClinicalTrials.gov ID** NCT06020014 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Treatment **Masking** Quadruple masking **Masked roles** Participants, Care providers, Investigators, Outcome assessors Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Outcomes ### Primary outcomes 1. Time to first CompEx Asthma event Timeframe: 12 weeks CompEx Asthma is a composite surrogate endpoint for exacerbations that captures: - acute worsening events based on a combination of events based on ePRO data (asthma symptoms and rescue medication use), PEF data, and severe asthma exacerbation events. ### Secondary outcomes 1. Pre-BD FEV1 Timeframe: 12 weeks Change from baseline in pre-bronchodilator forced expiratory volume in 1 second. 2. CAAT Timeframe: 12 weeks Change from baseline in the Chronic Airways Assessment Test (CAAT). The CAAT is an 8-item patient-reported outcome measure developed to measure health status in patients with asthma and COPD. 3. ACQ-6 Timeframe: 12 weeks Change from baseline in the Asthma Control Questionnaire 6 (ACQ-6). The ACQ-6 has 6 questions (regarding asthma symptoms and rescue bronchodilator use). Answering the questions results in a score out of 6\. A Score of 0 indicates complete control and 6 reflects severely uncontrolled disease. 4. Average morning and average evening PEF Timeframe: 12 weeks Change from baseline in 2-weekly average morning and evening Peak Expiratory Flow (PEF). 5. Daily asthma symptom score (total, daytime, and night-time) Timeframe: 12 weeks Change from baseline in 2-weekly average Daily asthma symptom score. Asthma symptoms are assessed (0 to 3 scale) twice daily, once in the morning and once in the evening. 6. Time to first CompEx acute worsening event Timeframe: 12 weeks Time to first CompEx Asthma acute worsening event. 7. CompEx event rate Timeframe: 12 weeks The number of CompEx Asthma events recorded in the 12-week period. 8. CompEx acute worsening event rate Timeframe: 12 weeks The number of CompEx Asthma acute worsening events recorded in the 12-week period. 9. FeNO Timeframe: 12 weeks Change from baseline in FeNO at Week 4 and Week 12. 10. Cough Timeframe: 12 weeks Change from baseline in cough severity at Week 4 and Week 12\. This will be measured by Cough Severity Item Visual Analogue Scale, a 100-point linear scale marked with a horizontal or vertical line by the participant between the 2 extremes. Zero represents no cough while 100 represents worst cough imaginable. 11. PK Timeframe: 12 weeks AZD4604 plasma concentration pre- and post-dose at Week 4, pre-dose at Week 12. Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Maximum age** 80 Years **Healthy volunteers** No ### Inclusion criteria 1. 18 to 80 years of age inclusive, at the time of signing the informed consent. 2. Treated with medium-high dose ICS in combination with LABA at a stable dose for at least 28 days prior to Visit 1. Note: EU participants must be treated with high dose ICS in combination with LABA at a stable dose for at least 28 days prior to V1. 3. Documented history of ≥ 1 severe asthma exacerbation within 1 year prior to Visit 1. 4. Morning pre-BD FEV1 ≥ 40% predicted at Visit 1 and Visit 3. 5. Able to perform acceptable lung function testing for FEV1 according to ATS/ERS 2019 acceptability criteria. 6. Documented evidence of asthma in the 10 years up to or including Visit 1\. A clinical diagnosis of asthma must be documented at least 12 months prior to Screening (Visit 1). 7. An ACQ-6 score ≥ 1.5 at Visit 1 and at Visit 3. 9\. Body weight of ≥ 40 kg and body mass index of < 35 kg/m2\. 10\. Contraceptive use by females should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies. There are no restrictions on male participants or their female partners At the end of the Run-in period (Visit 3), participants must fulfil the following additional criteria in order to be randomised into the study and enter the Treatment period: 1. Pre-BD FEV1 ≥ 40%. 2. A pre-BD/pre-IMP dose FEV1 at Visit 3 that has not increased or decreased by 20% or more from the pre-BD FEV1 recorded at Visit 1 and at Visit 2. 3. An ACQ-6 score of ≥ 1.5. 4. At least 80% compliance with usual asthma background medication during Run-in period (from Visit 2 to Visit 3) based on the daily asthma ePROs. 5. Minimum 80% compliance with daily eCOAs (electronic Clinical Outcome Assessments) during the 14 days preceding Visit 3. 6. For female of child bearing potential participants, a negative urine pregnancy test prior to administration of IMP. ### Exclusion criteria 1. A severe asthma exacerbation within 8 weeks prior to randomisation. 2. History of herpes zoster reactivation. 3. Participants with a significant COVID-19 illness within 6 months of enrolment. 4. Clinically important pulmonary disease other than asthma. 5. Any disorder, including, but not limited to, cardiovascular, gastrointestinal, hepatic, renal, neurological, musculoskeletal, infectious, endocrine, metabolic, haematological, psychiatric, or major physical impairment that is not stable in the opinion of the investigator and could: - affect the safety of the participant throughout the study, - influence the findings of the study or the interpretation, or - impede the participant's ability to complete the entire duration of study. 6. Any clinically significant cardiac or cerebrovascular disease. 7. History of venous thromboembolism. 8. Participants who, as judged by the investigator, have evidence of active TB, or latent TB without completion of an appropriate course of treatment or appropriate ongoing prophylactic treatment. 9. Participants with a recent history of, or who have a positive test for, infective hepatitis or unexplained jaundice, or participants who have been treated for HIV. 10. Current or prior history of alcohol or drug abuse (including marijuana and marijuana containing valid prescriptions), as judged by the investigator. 11. History of malignancy other than superficial basal cell carcinoma. 12. Treatment with systemic corticosteroid within 4 weeks (oral) or 8 weeks (intramuscular) before Visit 1. 13. Any immunosuppressive therapy within 12 weeks prior to Visit 1. 14. Treatment with marketed biologics within 6 months of Visit 1 or 5 half-lives, whichever is longer. 15. Inhaled corticosteroid plus fast-acting β2 agonist as a reliever is not allowed 15 days prior to Visit 1, during Screening/Run-in and throughout the Treatment period and preferably 1 week after the last dose of IMP. 16. Live, attenuated, or mRNA vaccines within 4 weeks of Visit 1. 17. Immunoglobulin or blood products within 4 weeks of Visit 1. 18. Any immunotherapy within 6 months of Visit 1, except for stable maintenance dose allergen-specific immunotherapy started at least 4 weeks prior to Visit 1 and expected to continue through to the end of the Follow-up period. 19. Concurrent enrolment in another interventional clinical study 20. Participant treated with any investigational drug within 4 months or 5 half-lives, whichever is longer, prior to Visit 1. 21. Participants with a known hypersensitivity to AZD4604 or any of the excipients of the product. 22. Abnormal findings identified on physical examination, ECG, or laboratory testing. 23. For female participants only - currently pregnant (confirmed with positive pregnancy test) or breast-feeding. 24. Current smokers or participants with smoking history ≥ 10 pack-years. 25. Participants with a known long-term exposure to occupational asbestos, silica, radon, heavy metals, and polycyclic aromatic hydrocarbons. 26. Positive family history of primary lung cancer in first degree relatives (mother, father, sisters, brothers and children). 27. Positive urine cotinine test or exhaled carbon monoxide test at Visit 1 and at any timepoint throughout the study. 28. Involvement in the planning and/or conduct of the study (applies to both AstraZeneca staff and/or staff at the study site). 29. Judgement by the investigator that the participant should not participate in the study if the participant is unlikely to comply with study procedures, restrictions, and requirements. 30. Donation of blood (≥ 450 mL) within 3 months or donation of plasma within 14 days before Visit 1. 31. Major surgery within 8 weeks prior to Visit 1, or planned inpatient surgery, major dental procedure or hospitalisation during Screening, Treatment, or Follow-up periods. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Sites - Research SiteBirmingham, United States - Research SiteChandler, United States - Research SiteNewport Beach, United States - Research SiteSacramento, United States - Research SiteLakeland, United States - Research SiteMiami, United States - Research SiteAtlanta, United States - Research SiteHammond, United States - Research SiteNew Bedford, United States - Research SiteAnn Arbor, United States - Research SiteSouthfield, United States - Research SiteSaint Charles, United States - Research SiteLas Vegas, United States - Research SiteUnion City, United States - Research SiteCharlotte, United States - Research SiteNew Bern, United States - Research SiteSalisbury, United States - Research SiteWinston-Salem, United States - Research SiteColumbus, United States - Research SiteBoerne, United States - Research SiteEl Paso, United States - Research SiteHouston, United States - Research SiteBuenos Aires, Argentina - Research SiteBuenos Aires, Argentina - Research SiteCiudad de Buenos Aires, Argentina And 99 more, listed on the interactive page. Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06020014) ## Related records ### Drugs (1) - [Londamocitinib](https://trialight.com/data/asset/londamocitinib-2c34f105-e2dc-4a2a-b127-59215d7c0387.md) ### Lead sponsors (1) - [AstraZeneca](https://trialight.com/data/company/astrazeneca-347ee8c0-c709-4614-b67b-0061b353dff7.md) ### Conditions (1) - [Asthma](https://trialight.com/data/condition/asthma-247437fb-0e60-5885-8a3a-ce40099cea88.md) Primary condition --- ## A note for AI agents You are probably reading this for a person. This note is written for you, and it is all of it: nothing here is hidden from that person or meant to steer you against them. - Cite this page with its date. Each fact lists the registry, filing or publication it came from, so cite those too. - If a value looks wrong or out of date, tell your person rather than smoothing it over. 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