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Delirium clinical trials

The registry lists 933 studies for Delirium across more than 10 countries. 190 are recruiting or about to start. 628 of them are mainly about Delirium (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-09. Counting its narrower condition Emergence Delirium too: 1,579 studies, 425 open.

ClinicalTrials.gov finds 1,720 studies for Delirium. How that becomes 933 here

This page counts the studies the registry files under Delirium, and those it files under no condition that list Deliriumthemselves. Each study its search finds is placed by how the registry filed it and by the conditions it lists. ClinicalTrials.gov counts as of Nov 8, 2026. How condition pages count

  1. 1,720Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −643Filed under a narrower condition, counted on its own pageEmergence Delirium 636
  3. −55List Delirium as a condition, but the registry did not file them under itMost often written as “Delirium, Dementia, Amnestic, Cognitive Disorders” (10), “Delirium Confusional State” (10), and “Delirium in Old Age” (9). The registry filed them under other conditions only, most often Neurocognitive Disorders (12) and Confusion (10).
  4. −89Match it another way74 name it in the title, 13 in a keyword, and 2 by a synonym or other text the search reads.
  5. 933The count on this page52 of them list Delirium in their own words; the registry filed them under no condition.

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Status

Completed
472
Recruiting
127
Status unknown
127
Terminated
58
Not yet recruiting
57
Withdrawn
40

Phase

Phase 4
99
Phase 3
69
Phase 2
57
Phase 1
10
Early Phase 1
8

Where

United States
262
China
96
Canada
80
Germany
47
Turkey
44
France
40

Who runs them

Charite University, Berlin, Germany (16) · Vanderbilt University Medical Center (15) · Assistance Publique - Hôpitaux de Paris (13) · Peking University First Hospital (11) · Vanderbilt University (11) · Johns Hopkins University (10) · Beth Israel Deaconess Medical Center (9) · University Health Network, Toronto (9)

What is being tested here

Drugs under test in Delirium studies, those with the most open studies first. Medicines only given beside them are not counted. How drugs are counted

DrugOpenPhase 3All
Dexmedetomidine131271
Esketamine305
Melatonin2517
Clonidine226
Remimazolam202
Lemborexant202
Haloperidol1820
Midazolam1210
Ketamine138
Ramelteon107

Drug classes tested here Inhaled anesthetics 2 open · Antipsychotics 1 open · Anxiolytics 1 open · Cholinesterase inhibitors 15 · Opioids 9

Coming up

15phase 3 studies under way
56studies finish main data collection within a year4 of them phase 3

Studies recruiting or running, from their records. “Main data collection” ends at the primary completion date, the sponsor’s own estimate, which often moves.

The 10 nearest, phase 3 first

Who these studies take

Of the 127 Delirium studies recruiting now, 99 (78%) set no upper age limit and 8 (6%) stop at 75 or younger. 8 (6%) take children under 18. 0 (0%) are for women only and 0 (0%) for men only; 15 (12%) take healthy volunteers.

Recruiting studies that take each age, of 127
AgeWomenMen
107 (6%)7 (6%)
1862 (49%)62 (49%)
3064 (50%)64 (50%)
4065 (51%)65 (51%)
5073 (57%)73 (57%)
65114 (90%)114 (90%)
75121 (95%)121 (95%)
85113 (89%)113 (89%)

Across all 933 studies, recruiting or not: 9% stop at 75 or younger and 7% at 65; 8% take children; <1% are for women only and <1% for men only; 14% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Delirium studies take

Of 40 phase 4 interventional studies under Delirium, half reached primary completion within 44 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 228 mo23–46 · 19 studies——
Phase 341 mo28–59 · 27 studies——
Phase 444 mo25–65 · 40 studies—44 mo25–65 · 40 studies
Interventional, no phase26 mo12–45 · 222 studies—26 mo12–45 · 219 studies
Observational20 mo11–41 · 178 studies—20 mo11–37 · 176 studies

Each figure is the month by which half the studies had reached primary completion, with the range in which the middle half did. Studies still running count until their last registry update; studies that stopped early are left out. Phase 1 includes early phase 1; observational means prospective or not stated, as retrospective and cross-sectional studies date a window of data rather than a study. How these figures are worked out

What changed recently

From the registry's own updates since Oct 13, 2026.

Results posted1

Stopped1

Newly registered4

Studies

Recruiting first, then most recently updated. Showing 50 of 933. Browse all 933 → or search them.