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Asthma clinical trials

The registry lists 4,841 studies for Asthma across more than 10 countries. 600 are recruiting or about to start. 4,235 of them are mainly about Asthma (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-10. Counting its 2 narrower conditions too, such as Asthma, Exercise-Induced: 4,890 studies, 602 open.

ClinicalTrials.gov finds 5,312 studies for Asthma. How that becomes 4,839 here

This page counts the studies the registry files under Asthma, and those it files under no condition that list Asthmathemselves. Each study its search finds is placed by how the registry filed it and by the conditions it lists. ClinicalTrials.gov counts as of Nov 8, 2026. How condition pages count

  1. 5,312Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −49Filed under a narrower condition, counted on its own pageAsthma, Exercise-Induced 32 · Status Asthmaticus 17
  3. −250List Asthma as a condition, but the registry did not file them under itMost often written as “Asthma in Children” (53), “Allergic Asthma” (33), and “Severe Eosinophilic Asthma” (15). The registry filed them under other conditions only, most often Pulmonary Eosinophilia (40) and Rhinitis, Allergic (37).
  4. −174Match it another way113 name it in the title, 21 in a keyword, and 40 by a synonym or other text the search reads.
  5. 4,839The count on this page372 of them list Asthma in their own words; the registry filed them under no condition.

Get an email when these change. Save the Asthma studies recruiting or about to start — once a week, free: studies that open, close, add sites or post results.

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Example · made-up studies

Breast cancer · Recruiting: 2 came in, 3 changed

What changed in your saved searches, Oct 31 – Nov 6:

A study of drug A after surgery for early breast cancer

Came in · now Recruiting

Drug B with hormone therapy in advanced breast cancer

Changed

· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

Exercise during chemotherapy

Now Active, not recruiting

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Status

Completed
3,296
Recruiting
417
Status unknown
392
Terminated
255
Withdrawn
159
Not yet recruiting
156

Phase

Phase 2
715
Phase 3
639
Phase 4
458
Phase 1
418
Early Phase 1
27

Where

United States
1,694
United Kingdom
558
Canada
428
Germany
384
France
296
Poland
255

Who runs them

AstraZeneca (330) · GlaxoSmithKline (261) · Novartis Pharmaceuticals (81) · National Heart, Lung, and Blood Institute (NHLBI) (76) · Chiesi Farmaceutici S.p.A. (66) · Organon and Co (62) · Boehringer Ingelheim (62) · Teva Branded Pharmaceutical Products R&D, Inc. (46)

What is being tested here

Drugs under test in Asthma studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Dupilumab71131
Tezepelumab71527
Budesonide651108
Albuterol51466
Benralizumab32037
Depemokimab3710
Tilrekimig323
Formoterol24781
Omalizumab21959
Mepolizumab21128

Drug classes tested here Corticosteroids 10 open · Bronchodilators 8 open · Antimuscarinics 3 open · Tyrosine kinase inhibitors (TKIs) 1 open · JAK inhibitors 1 open

Coming up

57phase 3 studies under way
209studies finish main data collection within a year16 of them phase 3

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

The 10 nearest, phase 3 first

Who these studies take

Of the 417 Asthma studies recruiting now, 140 (34%) set no upper age limit and 205 (49%) stop at 75 or younger. 146 (35%) take children under 18. 4 (1%) are for women only and 0 (0%) for men only; 104 (25%) take healthy volunteers.

Recruiting studies that take each age, of 417
AgeWomenMen
10101 (24%)101 (24%)
18326 (78%)323 (77%)
30331 (79%)327 (78%)
40332 (80%)329 (79%)
50320 (77%)320 (77%)
65301 (72%)301 (72%)
75256 (61%)256 (61%)
85187 (45%)187 (45%)

Across all 4,841 studies, recruiting or not: 61% stop at 75 or younger and 50% at 65; 42% take children; 1% are for women only and 2% for men only; 20% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Asthma studies take

Of 205 phase 3 interventional studies under Asthma, half reached primary completion within 27 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 16 mo3–14 · 200 studies5 mo3–12 · 173 studies—
Phase 220 mo12–41 · 198 studies16 mo10–23 · 137 studies46 mo28–62 · 61 studies
Phase 2/328 mo12–59 · 14 studies——
Phase 327 mo14–42 · 205 studies25 mo14–41 · 173 studies35 mo18–54 · 32 studies
Phase 424 mo11–37 · 156 studies21 mo9–33 · 66 studies27 mo12–41 · 90 studies
Interventional, no phase23 mo10–48 · 649 studies12 mo5–24 · 50 studies24 mo11–50 · 599 studies
Observational36 mo18–82 · 454 studies28 mo17–58 · 90 studies38 mo18–97 · 364 studies

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

What changed recently

From the registry's own updates since Oct 11, 2026.

Started recruiting7

Show 2 more

Results posted4

Stopped2

Newly registered13

Show 8 more

Studies

Recruiting first, then most recently updated. Showing 50 of 4,841. Browse all 4,841 → or search them.