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Condition (MeSH)

Bronchiolitis

ClinicalTrials.gov lists 1,047 trials for Bronchiolitis or a narrower condition beneath it. Novartis Pharmaceuticals has the most among industry and government lead sponsors, with 17.

MeSH D001988 Infections C01 C08
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Phase 1 Phase 1 63 Phase 1/2 Phase 1/2 55 Phase 2 Phase 2 172 Phase 2/3 Phase 2/3 20 Phase 3 Phase 3 104 Phase 4 Phase 4 76 Not applicable Not applicable 332 Observational Observational 224 Phase 1 Phase 1 63 Phase 1/2 Phase 1/2 55 Phase 2 Phase 2 172 Phase 2/3 Phase 2/3 20 Phase 3 Phase 3 104 Phase 4 Phase 4 76 Not applicable Not applicable 332 Observational Observational 224

Trials per phase

1 more section with rows

260 of the 1,047 trials are tagged with Bronchiolitis itself; the rest are tagged with a narrower condition beneath it.

Get the Bronchiolitis report as a PDF

The PDF carries up to 50 rows of each section, where the page shows the first few, with the sources listed. Enter a work email and confirm it from the message we send, and the report follows by email.

When did Bronchiolitis trials start? (30)

Shown in this order: most recent first, 1990 onwards. 2026 is partial: trials registered with a 2026 start date so far, not a full year. 1 trial is registered to start in 2027 or later, and not listed here.

Trials over time, by phase

  • Phase 1
  • Phase 1/2
  • Phase 2
  • Phase 2/3
  • Phase 3
  • Phase 4
  • Not applicable
  • Observational

Top of scale: 67

1994: 1 trials (Phase 3 1) 1998: 1 trials (Observational 1) 1999: 1 trials (Phase 3 1) 2000: 3 trials (Observational 2, Phase 3 1) 2001: 6 trials (Phase 3 2, Phase 2 2, Phase 1/2 2) 2002: 2 trials (Not applicable 1, Phase 3 1) 2003: 17 trials (Not applicable 2, Phase 4 2, Phase 3 3, Phase 2/3 1, Phase 2 5, Phase 1/2 3, Phase 1 1) 2004: 18 trials (Observational 3, Not applicable 4, Phase 4 2, Phase 3 3, Phase 2 4, Phase 1/2 1, Phase 1 1) 2005: 22 trials (Observational 6, Not applicable 3, Phase 4 5, Phase 3 3, Phase 2 3, Phase 1/2 1, Phase 1 1) 2006: 26 trials (Observational 5, Not applicable 6, Phase 4 1, Phase 3 5, Phase 2/3 1, Phase 2 6, Phase 1/2 2) 2007: 33 trials (Observational 8, Not applicable 4, Phase 4 3, Phase 3 6, Phase 2/3 2, Phase 2 6, Phase 1/2 1, Phase 1 3) 2008: 39 trials (Observational 1, Not applicable 8, Phase 4 7, Phase 3 5, Phase 2/3 2, Phase 2 14, Phase 1 2) 2009: 31 trials (Observational 10, Not applicable 6, Phase 4 1, Phase 3 4, Phase 2/3 2, Phase 2 5, Phase 1/2 1, Phase 1 2) 2010: 53 trials (Observational 12, Not applicable 10, Phase 4 9, Phase 3 4, Phase 2/3 1, Phase 2 7, Phase 1/2 4, Phase 1 6) 2011: 53 trials (Observational 10, Not applicable 13, Phase 4 5, Phase 3 5, Phase 2 13, Phase 1/2 3, Phase 1 4) 2012: 56 trials (Observational 15, Not applicable 11, Phase 4 3, Phase 3 11, Phase 2/3 1, Phase 2 7, Phase 1/2 4, Phase 1 4) 2013: 49 trials (Observational 5, Not applicable 17, Phase 4 4, Phase 3 8, Phase 2/3 1, Phase 2 7, Phase 1/2 3, Phase 1 4) 2014: 47 trials (Observational 9, Not applicable 14, Phase 4 6, Phase 3 6, Phase 2/3 2, Phase 2 5, Phase 1/2 4, Phase 1 1) 2015: 61 trials (Observational 12, Not applicable 21, Phase 4 2, Phase 3 7, Phase 2/3 2, Phase 2 13, Phase 1/2 1, Phase 1 3) 2016: 52 trials (Observational 6, Not applicable 20, Phase 4 6, Phase 3 1, Phase 2/3 1, Phase 2 12, Phase 1/2 5, Phase 1 1) 2017: 36 trials (Observational 12, Not applicable 10, Phase 4 2, Phase 3 5, Phase 2 4, Phase 1/2 1, Phase 1 2) 2018: 39 trials (Observational 12, Not applicable 16, Phase 4 1, Phase 3 2, Phase 2 3, Phase 1/2 2, Phase 1 3) 2019: 44 trials (Observational 12, Not applicable 11, Phase 4 1, Phase 3 6, Phase 2/3 1, Phase 2 5, Phase 1/2 4, Phase 1 4) 2020: 43 trials (Observational 11, Not applicable 17, Phase 4 1, Phase 3 1, Phase 2 8, Phase 1/2 3, Phase 1 2) 2021: 42 trials (Observational 6, Not applicable 17, Phase 4 3, Phase 3 1, Phase 2/3 1, Phase 2 9, Phase 1/2 2, Phase 1 3) 2022: 37 trials (Observational 9, Not applicable 17, Phase 3 2, Phase 2/3 1, Phase 2 5, Phase 1/2 1, Phase 1 2) 2023: 51 trials (Observational 15, Not applicable 27, Phase 4 1, Phase 2/3 1, Phase 2 5, Phase 1/2 1, Phase 1 1) 2024: 62 trials (Observational 15, Not applicable 28, Phase 4 3, Phase 3 2, Phase 2 9, Phase 1/2 3, Phase 1 2) 2025: 67 trials (Observational 17, Not applicable 25, Phase 4 2, Phase 3 5, Phase 2 10, Phase 1/2 2, Phase 1 6)

Trials registered with a start date in each year, 1990 onward, stacked by phase (complete years only; the current partial year is in the table's notes). The table below lists the same counts, most recent years first.

Trials started per year
Year Trials started
2026 (partial year) 46
2025 67
2024 62
2023 51
2022 37
2021 42
2020 43
2019 44
2018 39
2017 36

Forecast of the full-year count, planned starts included, not rows of this table: about 61 trials starting in 2026 and about 65 in 2027, the average of the 24 months through September, counted as registered and carried forward, with about 0.7 times the starts already registered for the rest of 2026 added. The rows of this table count trials registered so far with a start date in the year, planned starts included; the forecast looks ahead to the count for the whole year, so it is not the same measure. In backtests on conditions of this size, forecasts made part-way through the year were typically off by about 15 percent and ran about 1 percent high against the count later registered; forecasts made before the year began were off by about 26 percent and ran about 20 percent low against the count later registered. The part-way figures are from forecasts that used a multiple fitted only on earlier years. These figures rest on a few years of history (target years from 2018 to 2025, varying by figure), place each condition as it is mapped today rather than as it was then, and score against a count for the newest year that was still being revised. Only condition series were scored.

Prediction, not a registry value: median of 36 months from start to primary completion across 89 trials still running at the 2026-10-09 snapshot; registered median of 24 months across 685 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Bronchiolitis trials in? (9)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 63
Phase 1/2 55
Phase 2 172
Phase 2/3 20
Phase 3 104
Phase 4 76
Not applicable 332
Observational 224
Expanded access 1

How many Bronchiolitis trials are recruiting? (10)

Shown in this order: the order a trial moves through, from not yet recruiting to unknown.

Trials by recruitment status
Status Trials
Not yet recruiting 35
Recruiting 109
Enrolling by invitation 4
Active, not recruiting 40
Completed 584

Status as registered on ClinicalTrials.gov. Each trial is counted once.

Which lead sponsors run the most Bronchiolitis trials? (7)

Shown in this order: most trials first. Lead sponsors the registry classes as industry, NIH, US federal, other government or network. A hospital or university the registry files as government can appear here. Sponsors it classes as academic or other are shown on the full page, because that class cannot separate an institution from a named investigator.

Lead sponsors
Sponsor Trials
Novartis Pharmaceuticals 17
Hoffmann-La Roche 12
Incyte Corporation 11
AstraZeneca 10
National Cancer Institute (NCI) 10

Which drugs are being tested for Bronchiolitis? (7)

Shown in this order: most trials first. One row per drug, matched to a single molecule under all its names, ranked by number of trials.

Drugs tested
Drug Trials
Belumosudil 14
IBRUTINIB 11
Montelukast 11
RITUXIMAB 10
Prednisone 8

Interventions as named in the registry (8)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
Ruxolitinib IR 12
1% Azithromycin 10
Dexamethasone/Dexamethasone acetate 8
Mofetil Mycophenolate 7
Iticitinib 6

These are the names sponsors entered on ClinicalTrials.gov that we have not matched to a single molecule. Some are drugs under a brand or code name; others are procedures, doses or arm labels.

Which serious adverse events do Bronchiolitis trials report? (10)

Shown in this order: most subjects affected first. Subjects affected summed across trials, a cross-trial signal, not a rate.

Serious adverse events in this condition's trials
Adverse event Subjects affected Trials
Hospitalizations 2,299 1
Pneumonia 390 54
Death 289 8
Pyrexia 136 25
COVID-19 95 10

Which publications cover Bronchiolitis? (296)

Shown in this order: major-topic papers first, then newest, then most linked to trials.

Sub-conditions in MeSH (2)

MeSH descendants one level down with at least one trial, most trials first.

Not on this page

Not measured: delivery record.

Checked, with nothing recorded for this condition: prevalence and rare-disease identity.

Browse all condition evidence pages