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Fatigue Syndrome, Chronic clinical trials

The registry lists 264 studies for Fatigue Syndrome, Chronic across more than 10 countries. 62 are recruiting or about to start. 170 of them are mainly about Fatigue Syndrome, Chronic (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-12.

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A study of drug A after surgery for early breast cancer

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· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

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Status

Completed
135
Recruiting
44
Status unknown
27
Active, not recruiting
16
Terminated
13
Not yet recruiting
12

Phase

Phase 2
36
Phase 3
13
Phase 1
12
Phase 4
12
Early Phase 1
2

Where

United States
86
Norway
25
Spain
18
Germany
17
United Kingdom
10
China
8

Who runs them

Stony Brook University (7) · Haukeland University Hospital (7) · Charite University, Berlin, Germany (6) · Norwegian University of Science and Technology (5) · University of Aarhus (5) · Icahn School of Medicine at Mount Sinai (5) · Oslo University Hospital (5) · University of Alabama at Birmingham (5)

What is being tested here

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

DrugOpenPhase 3All
Naltrexone204
Rituximab125
Conestat alfa102
Pyridostigmine102
Inebilizumab101
Metformin111
Lingzhi mushroom111
Testosterone undecanoate101
Testosterone101
N,N-diethyl-2-(2-(4-(2-fluoroethoxy)phenyl)-5,7-dimethylpyrazolo(1,5-a)pyrimidin-3-yl)acetamide101

Coming up

2phase 3 studies under way
27studies finish main data collection within a year

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

Who these studies take

Of the 44 Fatigue Syndrome, Chronic studies recruiting now, 18 (41%) set no upper age limit and 20 (45%) stop at 75 or younger. 5 (11%) take children under 18. 1 (2%) are for women only and 1 (2%) for men only; 10 (23%) take healthy volunteers.

Recruiting studies that take each age, of 44
AgeWomenMen
105 (11%)5 (11%)
1839 (89%)40 (91%)
3040 (91%)40 (91%)
4041 (93%)41 (93%)
5042 (95%)42 (95%)
6537 (84%)36 (82%)
7524 (55%)23 (52%)
8519 (43%)19 (43%)

Across all 264 studies, recruiting or not: 63% stop at 75 or younger and 47% at 65; 12% take children; 7% are for women only and 1% for men only; 30% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Fatigue Syndrome, Chronic studies take

Of 78 interventional studies with no phase under Fatigue Syndrome, Chronic, half reached primary completion within 23 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase23 mo11–43 · 78 studies—24 mo11–43 · 73 studies
Observational44 mo25–79 · 41 studies—44 mo27–79 · 39 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 14, 2026.

Started recruiting1

Stopped1

Newly registered4

Studies

Recruiting first, then most recently updated. Showing 50 of 264. Browse all 264 → or search them.