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Mental Fatigue clinical trials

The registry lists 175 studies for Mental Fatigue across more than 10 countries. 54 are recruiting or about to start. 93 of them are mainly about Mental Fatigue (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-04. Counting its narrower condition Compassion Fatigue too: 235 studies, 75 open.

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Status

Completed
92
Recruiting
29
Not yet recruiting
20
Status unknown
18
Active, not recruiting
9
Enrolling by invitation
5

Phase

Phase 2
13
Phase 4
4
Early Phase 1
2
Phase 3
2
Phase 1
2

Where

United States
56
Turkey
21
Belgium
15
China
9
United Kingdom
8
Sweden
8

Who runs them

Vrije Universiteit Brussel (10) · Lincoln University College (5) · Nanyang Technological University (5) · Bandırma Onyedi Eylül University (4) · Vastra Gotaland Region (4) · PepsiCo Global R&D (3) · Inonu University (3) · Francisco Javier Martínez Noguera (2)

What is being tested here

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

DrugOpenPhase 3All
Vitamin B 12202
Guanfacine101
Cromolyn101
Sildenafil111
1-eicosapentaenoylglycerol101
Tianeptine101
OSU 6162002
Taurine001
Caffeine001
Phosphatidylserines001

Coming up

1phase 3 study under way
22studies 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 29 Mental Fatigue studies recruiting now, 9 (31%) set no upper age limit and 19 (66%) stop at 75 or younger. 1 (3%) take children under 18. 3 (10%) are for women only and 1 (3%) for men only; 15 (52%) take healthy volunteers.

Recruiting studies that take each age, of 29
AgeWomenMen
101 (3%)1 (3%)
1823 (79%)23 (79%)
3026 (90%)26 (90%)
4026 (90%)24 (83%)
5026 (90%)23 (79%)
6520 (69%)19 (66%)
7511 (38%)11 (38%)
8510 (34%)10 (34%)

Across all 175 studies, recruiting or not: 70% stop at 75 or younger and 62% at 65; 7% take children; 10% are for women only and 10% for men only; 59% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Mental Fatigue studies take

Of 92 interventional studies with no phase under Mental Fatigue, half reached primary completion within 8 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase8 mo3–23 · 92 studies—9 mo3–23 · 80 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.

Started recruiting1

Newly registered3

Studies

Recruiting first, then most recently updated. Showing 50 of 175. Browse all 175 → or search them.