Skip to content
Pharma Observatory a Scientist.com platform

Condition (MeSH)

Leukopenia

ClinicalTrials.gov lists 519 trials for Leukopenia or a narrower condition beneath it. Amgen has the most among industry and government lead sponsors, with 16.

MeSH D007970 Hemic and Lymphatic Diseases C15
Email me this page as a PDF

Search trials, drugs, companies and investigators, and follow each one to the others. Individual plan, $249/seat/mo. Card required.

Phase 1 Phase 1 50 Phase 1/2 Phase 1/2 31 Phase 2 Phase 2 105 Phase 2/3 Phase 2/3 10 Phase 3 Phase 3 68 Phase 4 Phase 4 52 Not applicable Not applicable 68 Observational Observational 134 Phase 1 Phase 1 50 Phase 1/2 Phase 1/2 31 Phase 2 Phase 2 105 Phase 2/3 Phase 2/3 10 Phase 3 Phase 3 68 Phase 4 Phase 4 52 Not applicable Not applicable 68 Observational Observational 134

Trials per phase

1 more section with rows

27 of the 519 trials are tagged with Leukopenia itself; the rest are tagged with a narrower condition beneath it.

Get the Leukopenia 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 Leukopenia 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. 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: 31

1992: 1 trials (Observational 1) 1993: 2 trials (Observational 1, Phase 3 1) 1994: 2 trials (Observational 1, Phase 3 1) 1995: 6 trials (Observational 2, Phase 3 1, Phase 2 2, Phase 1 1) 1996: 5 trials (Observational 1, Phase 2 1, Phase 1 3) 1997: 1 trials (Phase 3 1) 1998: 2 trials (Phase 1 2) 1999: 4 trials (Phase 3 2, Phase 2 1, Phase 1 1) 2000: 8 trials (Observational 1, Not applicable 2, Phase 3 1, Phase 2/3 1, Phase 2 2, Phase 1 1) 2001: 8 trials (Not applicable 2, Phase 4 2, Phase 3 2, Phase 2 2) 2002: 14 trials (Observational 2, Not applicable 2, Phase 4 3, Phase 3 5, Phase 2 2) 2003: 10 trials (Observational 1, Phase 4 1, Phase 2 5, Phase 1/2 3) 2004: 7 trials (Observational 2, Phase 4 1, Phase 3 1, Phase 2 3) 2005: 7 trials (Not applicable 1, Phase 4 1, Phase 3 2, Phase 2 2, Phase 1 1) 2006: 11 trials (Phase 4 1, Phase 3 3, Phase 2 3, Phase 1/2 2, Phase 1 2) 2007: 17 trials (Observational 2, Not applicable 1, Phase 4 2, Phase 3 3, Phase 2 5, Phase 1/2 2, Phase 1 2) 2008: 19 trials (Observational 6, Phase 4 2, Phase 3 5, Phase 2 2, Phase 1/2 2, Phase 1 2) 2009: 15 trials (Observational 5, Phase 4 2, Phase 3 2, Phase 2 5, Phase 1/2 1) 2010: 20 trials (Observational 4, Not applicable 3, Phase 4 3, Phase 2/3 2, Phase 2 2, Phase 1/2 4, Phase 1 2) 2011: 26 trials (Observational 7, Not applicable 1, Phase 4 3, Phase 3 4, Phase 2 7, Phase 1/2 3, Phase 1 1) 2012: 31 trials (Observational 7, Not applicable 7, Phase 4 2, Phase 3 4, Phase 2/3 1, Phase 2 4, Phase 1/2 2, Phase 1 4) 2013: 14 trials (Observational 3, Not applicable 1, Phase 3 1, Phase 2/3 1, Phase 2 7, Phase 1/2 1) 2014: 17 trials (Observational 4, Phase 4 1, Phase 3 2, Phase 2/3 3, Phase 2 4, Phase 1/2 2, Phase 1 1) 2015: 26 trials (Observational 7, Not applicable 2, Phase 4 2, Phase 3 3, Phase 2/3 1, Phase 2 3, Phase 1/2 1, Phase 1 7) 2016: 22 trials (Observational 7, Not applicable 3, Phase 4 2, Phase 3 2, Phase 2 4, Phase 1/2 1, Phase 1 3) 2017: 17 trials (Observational 4, Not applicable 2, Phase 3 4, Phase 2 6, Phase 1/2 1) 2018: 19 trials (Observational 8, Not applicable 4, Phase 4 1, Phase 3 3, Phase 2 1, Phase 1/2 1, Phase 1 1) 2019: 23 trials (Observational 8, Not applicable 1, Phase 4 5, Phase 3 2, Phase 2 6, Phase 1 1) 2020: 26 trials (Observational 9, Not applicable 5, Phase 3 2, Phase 2 6, Phase 1 4) 2021: 18 trials (Observational 6, Not applicable 4, Phase 4 2, Phase 3 1, Phase 2 2, Phase 1/2 3) 2022: 20 trials (Observational 7, Not applicable 4, Phase 4 3, Phase 3 2, Phase 2/3 1, Phase 2 1, Phase 1 2) 2023: 19 trials (Observational 8, Not applicable 5, Phase 4 2, Phase 3 1, Phase 2 1, Phase 1/2 1, Phase 1 1) 2024: 21 trials (Observational 7, Not applicable 3, Phase 4 4, Phase 3 2, Phase 2 2, Phase 1/2 1, Phase 1 2) 2025: 26 trials (Observational 5, Not applicable 10, Phase 4 4, Phase 3 1, Phase 2 5, Phase 1 1)

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) 18
2025 26
2024 21
2023 19
2022 20
2021 18
2020 26
2019 23
2018 19
2017 17

Forecast of the full-year count, planned starts included, not rows of this table: about 24 trials starting in 2026 and about 25 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 33 trials still running at the 2026-10-09 snapshot; registered median of 27 months across 319 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Leukopenia trials in? (9)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 50
Phase 1/2 31
Phase 2 105
Phase 2/3 10
Phase 3 68
Phase 4 52
Not applicable 68
Observational 134
Expanded access 1

How many Leukopenia 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 22
Recruiting 38
Enrolling by invitation 3
Active, not recruiting 13
Available 1

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

Which lead sponsors run the most Leukopenia trials? (11)

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
Amgen 16
National Heart, Lung, and Blood Institute (NHLBI) 15
National Institute of Allergy and Infectious Diseases (NIAID) 12
Pfizer 11
Sandoz 10

Which drugs are being tested for Leukopenia? (5)

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
PEGFILGRASTIM 40
Cytoxan 17
CYT107 10
CEFEPIME 8
G-CSF 7

Interventions as named in the registry (10)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
Filgrastime (G-CSF) 32
Sagramostim 8
Docetetaxel 8
Etoposid 8
I.V. Meropenem 7

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 Leukopenia 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
Febrile neutropenia 115 23
Sepsis 44 15
Pyrexia 43 14
Febrile Neutropenia 36 2
Neutropenia 34 7

Which publications cover Leukopenia? (232)

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