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Failed Back Surgery Syndrome clinical trials

The registry lists 104 studies for Failed Back Surgery Syndrome across more than 10 countries. 17 are recruiting or about to start. 74 of them are mainly about Failed Back Surgery Syndrome (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-04.

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Status

Completed
64
Recruiting
12
Terminated
10
Status unknown
7
Not yet recruiting
5
Withdrawn
3

Phase

Phase 4
10
Phase 2
2
Phase 3
2
Phase 1
1

Where

United States
26
Belgium
25
Netherlands
9
France
9
Spain
7
Korea, Republic of
5

Who runs them

Moens Maarten (10) · Universitair Ziekenhuis Brussel (8) · MedtronicNeuro (6) · Poitiers University Hospital (5) · Assiut University (3) · Boston Scientific Corporation (3) · Abbott Medical Devices (3) · University of Michigan (2)

What is being tested here

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

DrugOpenPhase 3All
Methylprednisolone Acetate102
Methylprednisolone102
Triamcinolone Acetonide101
Triamcinolone101
Betamethasone acetate phosphate101
Betamethasone101
Dexamethasone101
Pregabalin002
Gabapentin002
Sodium Bicarbonate011

Coming up

1phase 3 study under way
2studies 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.

All 2

Who these studies take

Of the 12 Failed Back Surgery Syndrome studies recruiting now, 8 (67%) set no upper age limit and 3 (25%) stop at 75 or younger. 1 (8%) take children under 18. 0 (0%) are for women only and 0 (0%) for men only; 2 (17%) take healthy volunteers.

Recruiting studies that take each age, of 12
AgeWomenMen
101 (8%)1 (8%)
1811 (92%)11 (92%)
3012 (100%)12 (100%)
4012 (100%)12 (100%)
5012 (100%)12 (100%)
6511 (92%)11 (92%)
759 (75%)9 (75%)
858 (67%)8 (67%)

Across all 104 studies, recruiting or not: 28% stop at 75 or younger and 9% at 65; 5% take children; 1% are for women only and 0% for men only; 9% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Failed Back Surgery Syndrome studies take

Of 38 interventional studies with no phase under Failed Back Surgery Syndrome, half reached primary completion within 23 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Interventional, no phase23 mo12–38 · 38 studies—23 mo12–52 · 36 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

Studies

Recruiting first, then most recently updated. Showing 50 of 104. Browse all 104 → or search them.