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Condition (MeSH)

Brain Diseases, Metabolic, Inborn

ClinicalTrials.gov lists 1,275 trials for Brain Diseases, Metabolic, Inborn or a narrower condition beneath it. Genzyme, a Sanofi Company has the most among industry and government lead sponsors, with 67.

MeSH D020739 Nervous System Diseases C10 C16 C18
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Phase 1 Phase 1 117 Phase 1/2 Phase 1/2 97 Phase 2 Phase 2 145 Phase 2/3 Phase 2/3 22 Phase 3 Phase 3 120 Phase 4 Phase 4 63 Not applicable Not applicable 186 Observational Observational 500 Phase 1 Phase 1 117 Phase 1/2 Phase 1/2 97 Phase 2 Phase 2 145 Phase 2/3 Phase 2/3 22 Phase 3 Phase 3 120 Phase 4 Phase 4 63 Not applicable Not applicable 186 Observational Observational 500

Trials per phase (log scale)

1 more section with rows

14 of the 1,275 trials are tagged with Brain Diseases, Metabolic, Inborn 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 Brain Diseases, Metabolic, Inborn trials start? (37)

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. 8 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 (Expanded access)

Top of scale: 86

1990: 1 trials (Phase 1/2 1) 1991: 2 trials (Observational 2) 1992: 1 trials (Phase 3 1) 1993: 4 trials (Observational 1, Phase 4 1, Phase 2 1, Phase 1 1) 1994: 3 trials (Observational 1, Phase 3 1, Phase 2 1) 1995: 7 trials (Observational 3, Not applicable 2, Phase 2/3 1, Phase 1 1) 1996: 1 trials (Phase 2 1) 1997: 2 trials (Observational 1, Phase 4 1) 1998: 4 trials (Not applicable 1, Phase 2 2, Phase 1 1) 1999: 7 trials (Observational 2, Phase 3 1, Phase 2 2, Phase 1 2) 2000: 2 trials (Observational 1, Phase 2 1) 2001: 10 trials (Observational 6, Phase 4 3, Phase 2 1) 2002: 9 trials (Observational 3, Phase 2 5, Phase 1 1) 2003: 10 trials (Other 1, Observational 1, Phase 2/3 1, Phase 2 5, Phase 1/2 1, Phase 1 1) 2004: 15 trials (Observational 6, Not applicable 1, Phase 4 2, Phase 3 1, Phase 2 4, Phase 1/2 1) 2005: 19 trials (Observational 5, Not applicable 1, Phase 4 2, Phase 3 6, Phase 2/3 1, Phase 2 2, Phase 1 2) 2006: 22 trials (Observational 5, Not applicable 1, Phase 4 2, Phase 3 3, Phase 2 8, Phase 1 3) 2007: 30 trials (Observational 12, Not applicable 4, Phase 4 2, Phase 3 2, Phase 2/3 1, Phase 2 6, Phase 1/2 2, Phase 1 1) 2008: 35 trials (Observational 11, Not applicable 1, Phase 4 2, Phase 3 8, Phase 2 8, Phase 1/2 1, Phase 1 4) 2009: 41 trials (Observational 14, Not applicable 6, Phase 4 1, Phase 3 7, Phase 2/3 1, Phase 2 5, Phase 1/2 2, Phase 1 5) 2010: 44 trials (Observational 21, Not applicable 6, Phase 4 4, Phase 3 3, Phase 2 4, Phase 1/2 3, Phase 1 3) 2011: 51 trials (Observational 18, Not applicable 4, Phase 4 1, Phase 3 9, Phase 2/3 1, Phase 2 9, Phase 1/2 3, Phase 1 6) 2012: 47 trials (Observational 16, Not applicable 7, Phase 4 5, Phase 3 3, Phase 2 8, Phase 1/2 5, Phase 1 3) 2013: 42 trials (Observational 10, Not applicable 11, Phase 4 2, Phase 3 5, Phase 2/3 2, Phase 2 2, Phase 1/2 3, Phase 1 7) 2014: 48 trials (Observational 19, Not applicable 6, Phase 4 3, Phase 3 2, Phase 2/3 1, Phase 2 10, Phase 1/2 4, Phase 1 3) 2015: 55 trials (Observational 25, Not applicable 7, Phase 4 3, Phase 3 2, Phase 2/3 3, Phase 2 4, Phase 1/2 2, Phase 1 9) 2016: 43 trials (Observational 22, Not applicable 7, Phase 4 3, Phase 3 1, Phase 2/3 1, Phase 2 2, Phase 1/2 2, Phase 1 5) 2017: 48 trials (Observational 18, Not applicable 12, Phase 3 4, Phase 2/3 1, Phase 2 3, Phase 1/2 5, Phase 1 5) 2018: 64 trials (Observational 30, Not applicable 7, Phase 4 4, Phase 3 11, Phase 2 5, Phase 1/2 4, Phase 1 3) 2019: 84 trials (Observational 36, Not applicable 16, Phase 4 2, Phase 3 5, Phase 2/3 1, Phase 2 7, Phase 1/2 10, Phase 1 7) 2020: 65 trials (Observational 28, Not applicable 6, Phase 4 4, Phase 3 4, Phase 2/3 2, Phase 2 6, Phase 1/2 7, Phase 1 8) 2021: 81 trials (Observational 36, Not applicable 15, Phase 4 4, Phase 3 7, Phase 2/3 1, Phase 2 3, Phase 1/2 10, Phase 1 5) 2022: 69 trials (Observational 28, Not applicable 11, Phase 4 3, Phase 3 12, Phase 2 3, Phase 1/2 8, Phase 1 4) 2023: 86 trials (Observational 43, Not applicable 14, Phase 4 4, Phase 3 6, Phase 2/3 2, Phase 2 7, Phase 1/2 5, Phase 1 5) 2024: 66 trials (Observational 25, Not applicable 16, Phase 4 1, Phase 3 5, Phase 2 5, Phase 1/2 6, Phase 1 8) 2025: 63 trials (Observational 28, Not applicable 13, Phase 4 3, Phase 3 5, Phase 2/3 1, Phase 2 7, Phase 1/2 3, Phase 1 3)

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) 55
2025 63
2024 66
2023 86
2022 69
2021 81
2020 65
2019 84
2018 64
2017 48

Forecast of the full-year count, planned starts included, not rows of this table: about 70 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 28 months across 716 trials with a primary completion typed Actual. Source: ClinicalTrials.gov / AACT (CTTI), public domain.

What phase are Brain Diseases, Metabolic, Inborn trials in? (9)

Shown in this order: phase order.

Show the trials by phase as a table
Trials by phase
Phase Trials
Phase 1 117
Phase 1/2 97
Phase 2 145
Phase 2/3 22
Phase 3 120
Phase 4 63
Not applicable 186
Observational 500
Expanded access 25

How many Brain Diseases, Metabolic, Inborn trials are recruiting? (12)

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 48
Recruiting 202
Enrolling by invitation 17
Active, not recruiting 70
Available 7

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

Which lead sponsors run the most Brain Diseases, Metabolic, Inborn trials? (12)

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
Genzyme, a Sanofi Company 67
Amicus Therapeutics 38
BioMarin Pharmaceutical 38
Shire 34
Sanofi 27

Which drugs are being tested for Brain Diseases, Metabolic, Inborn? (14)

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
ALGLUCOSIDASE ALFA 28
REPLAGAL 20
Migalastat 20
AGALSIDASE BETA (GZ419828) 20
Miglustat 14

Interventions as named in the registry (1)

Shown in this order: most trials first.

Interventions as named in the registry
Drug Trials
saproterin dihydrochloride 38

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 Brain Diseases, Metabolic, Inborn 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 126 39
Hyperammonaemia 95 8
Pyrexia 92 32
Death 90 10
Vomiting 73 29

Which publications cover Brain Diseases, Metabolic, Inborn? (18)

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

Sub-conditions in MeSH (24)

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