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Condition (MeSH)

Blood Platelet Disorders

ClinicalTrials.gov lists 1,407 trials for Blood Platelet Disorders or a narrower condition beneath it. GlaxoSmithKline has the most among industry and government lead sponsors, with 28.

MeSH D001791 Hemic and Lymphatic Diseases C15
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Phase 1 Phase 1 135 Phase 1/2 Phase 1/2 76 Phase 2 Phase 2 356 Phase 2/3 Phase 2/3 35 Phase 3 Phase 3 219 Phase 4 Phase 4 64 Not applicable Not applicable 122 Observational Observational 392 Phase 1 Phase 1 135 Phase 1/2 Phase 1/2 76 Phase 2 Phase 2 356 Phase 2/3 Phase 2/3 35 Phase 3 Phase 3 219 Phase 4 Phase 4 64 Not applicable Not applicable 122 Observational Observational 392

Trials per phase

2 more sections with rows

47 of the 1,407 trials are tagged with Blood Platelet Disorders itself; the rest are tagged with a narrower condition beneath it.

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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 Blood Platelet Disorders trials start? (35)

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. 4 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
  • Other (Unknown)

Top of scale: 100

1992: 1 trials (Phase 2 1) 1993: 3 trials (Observational 1, Phase 2 1, Phase 1 1) 1994: 1 trials (Phase 2 1) 1995: 3 trials (Observational 1, Not applicable 1, Phase 2 1) 1996: 4 trials (Observational 1, Phase 2 2, Phase 1 1) 1997: 8 trials (Not applicable 1, Phase 3 1, Phase 2 1, Phase 1/2 1, Phase 1 4) 1998: 7 trials (Phase 3 1, Phase 2/3 1, Phase 1/2 1, Phase 1 4) 1999: 12 trials (Not applicable 2, Phase 3 3, Phase 2 3, Phase 1 4) 2000: 13 trials (Observational 1, Not applicable 1, Phase 3 4, Phase 2 3, Phase 1/2 3, Phase 1 1) 2001: 11 trials (Observational 1, Not applicable 2, Phase 4 1, Phase 3 2, Phase 2 3, Phase 1 2) 2002: 20 trials (Observational 3, Not applicable 1, Phase 3 4, Phase 2 6, Phase 1/2 4, Phase 1 2) 2003: 15 trials (Observational 2, Phase 4 1, Phase 3 4, Phase 2/3 1, Phase 2 5, Phase 1/2 1, Phase 1 1) 2004: 20 trials (Observational 5, Not applicable 1, Phase 4 1, Phase 3 4, Phase 2 7, Phase 1 2) 2005: 43 trials (Observational 10, Not applicable 2, Phase 4 1, Phase 3 8, Phase 2 12, Phase 1/2 5, Phase 1 5) 2006: 39 trials (Observational 8, Not applicable 2, Phase 4 1, Phase 3 6, Phase 2/3 1, Phase 2 15, Phase 1/2 1, Phase 1 5) 2007: 42 trials (Observational 10, Not applicable 3, Phase 3 8, Phase 2 11, Phase 1/2 5, Phase 1 5) 2008: 43 trials (Observational 10, Not applicable 1, Phase 4 1, Phase 3 7, Phase 2/3 2, Phase 2 13, Phase 1/2 5, Phase 1 4) 2009: 42 trials (Other 1, Observational 10, Not applicable 3, Phase 4 3, Phase 3 5, Phase 2/3 1, Phase 2 14, Phase 1/2 2, Phase 1 3) 2010: 54 trials (Observational 17, Not applicable 4, Phase 4 3, Phase 3 6, Phase 2/3 1, Phase 2 17, Phase 1/2 2, Phase 1 4) 2011: 39 trials (Observational 15, Not applicable 1, Phase 4 1, Phase 3 6, Phase 2 9, Phase 1/2 2, Phase 1 5) 2012: 49 trials (Observational 14, Not applicable 4, Phase 4 4, Phase 3 10, Phase 2/3 1, Phase 2 10, Phase 1/2 2, Phase 1 4) 2013: 41 trials (Observational 14, Not applicable 5, Phase 4 3, Phase 3 5, Phase 2/3 2, Phase 2 7, Phase 1/2 2, Phase 1 3) 2014: 55 trials (Observational 14, Not applicable 3, Phase 4 1, Phase 3 14, Phase 2/3 2, Phase 2 13, Phase 1/2 3, Phase 1 5) 2015: 50 trials (Observational 15, Not applicable 2, Phase 4 6, Phase 3 11, Phase 2/3 1, Phase 2 10, Phase 1/2 4, Phase 1 1) 2016: 37 trials (Observational 14, Not applicable 3, Phase 4 1, Phase 3 9, Phase 2/3 1, Phase 2 6, Phase 1/2 1, Phase 1 2) 2017: 53 trials (Observational 16, Not applicable 8, Phase 4 4, Phase 3 11, Phase 2/3 1, Phase 2 10, Phase 1 3) 2018: 58 trials (Observational 26, Not applicable 6, Phase 4 1, Phase 3 8, Phase 2/3 3, Phase 2 8, Phase 1/2 2, Phase 1 4) 2019: 70 trials (Observational 29, Not applicable 6, Phase 4 5, Phase 3 7, Phase 2/3 3, Phase 2 13, Phase 1/2 4, Phase 1 3) 2020: 64 trials (Observational 15, Not applicable 6, Phase 4 5, Phase 3 11, Phase 2 20, Phase 1/2 1, Phase 1 6) 2021: 87 trials (Observational 27, Not applicable 5, Phase 4 7, Phase 3 17, Phase 2/3 2, Phase 2 22, Phase 1/2 3, Phase 1 4) 2022: 75 trials (Observational 19, Not applicable 5, Phase 4 6, Phase 3 12, Phase 2/3 3, Phase 2 23, Phase 1/2 3, Phase 1 4) 2023: 82 trials (Observational 24, Not applicable 10, Phase 4 2, Phase 3 7, Phase 2/3 2, Phase 2 27, Phase 1/2 3, Phase 1 7) 2024: 79 trials (Observational 27, Not applicable 10, Phase 4 1, Phase 3 10, Phase 2/3 2, Phase 2 16, Phase 1/2 2, Phase 1 11) 2025: 100 trials (Observational 24, Not applicable 10, Phase 4 4, Phase 3 13, Phase 2/3 3, Phase 2 24, Phase 1/2 10, Phase 1 12)

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) 70
2025 100
2024 79
2023 82
2022 75
2021 87
2020 64
2019 70
2018 58
2017 53

Forecast of the full-year count, planned starts included, not rows of this table: about 93 trials starting in 2026 and about 97 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 158 trials still running at the 2026-10-09 snapshot; registered median of 32 months across 792 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Blood Platelet Disorders trials in? (10)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 135
Phase 1/2 76
Phase 2 356
Phase 2/3 35
Phase 3 219
Phase 4 64
Not applicable 122
Observational 392
Expanded access 7
Unknown 1

How many Blood Platelet Disorders trials are recruiting? (11)

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 66
Recruiting 222
Enrolling by invitation 4
Active, not recruiting 56
Available 4

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

Which lead sponsors run the most Blood Platelet Disorders 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
GlaxoSmithKline 28
Novartis Pharmaceuticals 27
Amgen 26
Alexion Pharmaceuticals, Inc. 21
National Heart, Lung, and Blood Institute (NHLBI) 20

Which drugs are being tested for Blood Platelet Disorders? (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
Eltrombopag 85
Romiplostim 51
Avatrombopag 39
RITUXIMAB 33
Cytoxan 30

Interventions as named in the registry (8)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
Dexamethasone/Dexamethasone acetate 42
SQ Fludarabine 28
Peripheral blood stem cell transplantation 26
Cyclosporine 0.05% 23
Ruxolitinib IR 22

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 Blood Platelet Disorders 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
Pneumonia 391 71
Febrile neutropenia 326 40
Thrombocytopenia 251 70
Anaemia 203 49
Sepsis 201 61

Which publications cover Blood Platelet Disorders? (63)

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

Sub-conditions in MeSH (6)

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