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Condition (MeSH)

Venous Thromboembolism

ClinicalTrials.gov lists 695 trials for Venous Thromboembolism or a narrower condition beneath it. Bayer has the most among industry and government lead sponsors, with 35.

MeSH D054556 Cardiovascular Diseases C14
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Phase 1 Phase 1 28 Phase 1/2 Phase 1/2 3 Phase 2 Phase 2 66 Phase 2/3 Phase 2/3 14 Phase 3 Phase 3 118 Phase 4 Phase 4 68 Not applicable Not applicable 108 Observational Observational 290 Phase 1 Phase 1 28 Phase 1/2 Phase 1/2 3 Phase 2 Phase 2 66 Phase 2/3 Phase 2/3 14 Phase 3 Phase 3 118 Phase 4 Phase 4 68 Not applicable Not applicable 108 Observational Observational 290

Trials per phase (log scale)

695 of the 695 trials are tagged with Venous Thromboembolism itself; the rest are tagged with a narrower condition beneath it.

Get the Venous Thromboembolism 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 Venous Thromboembolism trials start? (34)

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. 2 trials are 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: 42

1990: 1 trials (Observational 1) 1991: 1 trials (Observational 1) 1992: 1 trials (Observational 1) 1994: 1 trials (Phase 4 1) 1996: 1 trials (Observational 1) 1998: 5 trials (Observational 2, Phase 3 3) 1999: 1 trials (Observational 1) 2000: 4 trials (Observational 2, Not applicable 1, Phase 2 1) 2001: 5 trials (Observational 4, Phase 3 1) 2002: 10 trials (Observational 3, Phase 4 3, Phase 3 1, Phase 2 3) 2003: 3 trials (Observational 1, Phase 4 1, Phase 3 1) 2004: 7 trials (Observational 1, Not applicable 1, Phase 2/3 1, Phase 2 4) 2005: 11 trials (Observational 4, Not applicable 1, Phase 4 1, Phase 3 1, Phase 2 3, Phase 1 1) 2006: 21 trials (Observational 8, Not applicable 3, Phase 3 5, Phase 2/3 1, Phase 2 4) 2007: 22 trials (Observational 3, Not applicable 1, Phase 4 3, Phase 3 9, Phase 2/3 1, Phase 2 4, Phase 1 1) 2008: 22 trials (Observational 6, Not applicable 2, Phase 3 12, Phase 2 2) 2009: 30 trials (Observational 8, Not applicable 4, Phase 4 2, Phase 3 9, Phase 2/3 3, Phase 2 2, Phase 1 2) 2010: 28 trials (Observational 11, Not applicable 1, Phase 4 4, Phase 3 10, Phase 2/3 1, Phase 2 1) 2011: 28 trials (Observational 15, Not applicable 4, Phase 4 2, Phase 3 3, Phase 2 1, Phase 1 3) 2012: 16 trials (Observational 7, Not applicable 3, Phase 3 3, Phase 2 3) 2013: 27 trials (Observational 13, Not applicable 3, Phase 4 1, Phase 3 5, Phase 2 4, Phase 1 1) 2014: 27 trials (Observational 10, Not applicable 7, Phase 4 1, Phase 3 4, Phase 2 3, Phase 1 2) 2015: 32 trials (Observational 14, Not applicable 4, Phase 4 2, Phase 3 5, Phase 2/3 2, Phase 2 3, Phase 1/2 1, Phase 1 1) 2016: 37 trials (Observational 14, Not applicable 4, Phase 4 5, Phase 3 6, Phase 2/3 1, Phase 2 1, Phase 1/2 1, Phase 1 5) 2017: 42 trials (Observational 17, Not applicable 6, Phase 4 4, Phase 3 5, Phase 2 9, Phase 1 1) 2018: 38 trials (Observational 20, Not applicable 6, Phase 4 6, Phase 3 1, Phase 2 4, Phase 1 1) 2019: 22 trials (Observational 11, Not applicable 4, Phase 4 1, Phase 3 1, Phase 2 3, Phase 1 2) 2020: 39 trials (Observational 20, Not applicable 4, Phase 4 7, Phase 3 5, Phase 2 1, Phase 1/2 1, Phase 1 1) 2021: 37 trials (Observational 17, Not applicable 6, Phase 4 6, Phase 3 3, Phase 2/3 1, Phase 2 2, Phase 1 2) 2022: 29 trials (Observational 15, Not applicable 5, Phase 4 2, Phase 3 6, Phase 2/3 1) 2023: 30 trials (Observational 16, Not applicable 7, Phase 4 2, Phase 3 1, Phase 2 3, Phase 1 1) 2024: 41 trials (Observational 15, Not applicable 13, Phase 4 6, Phase 3 4, Phase 2/3 1, Phase 2 2) 2025: 38 trials (Observational 11, Not applicable 11, Phase 4 4, Phase 3 7, Phase 2/3 1, Phase 2 2, Phase 1 2)

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) 34
2025 38
2024 41
2023 30
2022 29
2021 37
2020 39
2019 22
2018 38
2017 42

Forecast of the full-year count, planned starts included, not rows of this table: about 43 trials starting in 2026 and about 41 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 59 trials still running at the 2026-10-09 snapshot; registered median of 25 months across 455 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Venous Thromboembolism trials in? (8)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 28
Phase 1/2 3
Phase 2 66
Phase 2/3 14
Phase 3 118
Phase 4 68
Not applicable 108
Observational 290

How many Venous Thromboembolism trials are recruiting? (9)

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 25
Recruiting 91
Enrolling by invitation 5
Active, not recruiting 12
Completed 403

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

Which lead sponsors run the most Venous Thromboembolism trials? (9)

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
Bayer 35
Boehringer Ingelheim 16
Sanofi 13
Bristol-Myers Squibb 10
Daiichi Sankyo 9

Which drugs are being tested for Venous Thromboembolism? (8)

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
LOVENOX 76
Rivaroxaban 73
Edoxaban 17
Innohep 13
Dabigatran 10

Interventions as named in the registry (7)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
Apixaban IR 50
Warfarin VKA 25
EC Aspirin 20
Fragmin P Forte (dalteparin sodium) 20
Low Heparin Molecular Weight 16

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 Venous Thromboembolism 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
Injury, poisoning, accidents, etc. 1,346 1
Genitourinary system 1,141 1
Digestive system 1,016 1
Cardiovascular system 849 1
Muscoskeletal system & connective tissue 842 1

Which publications cover Venous Thromboembolism? (1,109)

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

Not on this page

Not measured: delivery record.

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

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