ClinicalTrials.gg
Sign In

Pain clinical trials

The registry lists 10,054 studies for Pain across more than 10 countries. 1,649 are recruiting or about to start. 5,290 of them are mainly about Pain (how this is decided). Per ClinicalTrials.gov, last updated 2026-11-10. Counting its 45 narrower conditions too, such as Postoperative Pain: 24,336 studies, 4,584 open.

ClinicalTrials.gov finds 38,356 studies for Pain. How that becomes 10,049 here

This page counts the studies the registry files under Pain, and those it files under no condition that list Painthemselves. 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. 38,356Found by its condition searchIt reads the conditions a study lists and their synonyms, and also titles and keywords.
  2. −14,043Filed under a narrower condition, counted on its own pageChronic Pain 2,722 · Low Back Pain 2,031 · Neck Pain 943 · Acute Pain 738 · Neuralgia 667 · Headache 617 · 36 more
  3. −6,342List Pain as a condition, but the registry did not file them under itMost often written as “Postoperative Pain” (1,811), “Pain, Postoperative” (1,144), and “Pain Management” (367). The registry filed 184 of them under no condition at all, and the others under other conditions only, most often Pain, Postoperative (3,985) and Agnosia (820).
  4. −7,922Match it another way6,368 name it in the title, 1,186 in a keyword, and 368 by a synonym or other text the search reads.
  5. 10,049The count on this page933 of them list Pain in their own words; the registry filed them under no condition.

Get an email when these change. Save the Pain studies recruiting or about to start — once a week, free: studies that open, close, add sites or post results.

Watch these studies
See an example email

Example · made-up studies

Breast cancer · Recruiting: 2 came in, 3 changed

What changed in your saved searches, Oct 31 – Nov 6:

A study of drug A after surgery for early breast cancer

Came in · now Recruiting

Drug B with hormone therapy in advanced breast cancer

Changed

· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

Exercise during chemotherapy

Now Active, not recruiting

One email a week for all your saved searches. Stop any time.

Status

Completed
6,385
Recruiting
929
Status unknown
926
Not yet recruiting
593
Terminated
545
Withdrawn
273

Phase

Phase 4
934
Phase 3
877
Phase 2
834
Phase 1
456
Early Phase 1
111

Where

United States
2,880
Turkey
1,712
France
481
Canada
461
Pakistan
352
Spain
341

Who runs them

Riphah International University (208) · Cairo University (103) · Pfizer (65) · Northwestern University (60) · Stanford University (59) · Hacettepe University (57) · Istanbul University - Cerrahpasa (53) · Duke University (51)

What is being tested here

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

DrugOpenPhase 3All
Bupivacaine1021128
Lidocaine928171
Dexmedetomidine9855
Ketamine81888
Dexamethasone7649
Cannabidiol7115
Adezunap777
Ibuprofen52278
Ketorolac5947
Dronabinol5114

Drug classes tested here Local anesthetics 25 open · Opioids 15 open · Corticosteroids 15 open · NSAIDs 14 open · Psychedelics 5 open

Coming up

76phase 3 studies under way
552studies finish main data collection within a year18 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 929 Pain studies recruiting now, 384 (41%) set no upper age limit and 434 (47%) stop at 75 or younger. 146 (16%) take children under 18. 123 (13%) are for women only and 11 (1%) for men only; 222 (24%) take healthy volunteers.

Recruiting studies that take each age, of 929
AgeWomenMen
1086 (9%)82 (9%)
18674 (73%)587 (63%)
30749 (81%)644 (69%)
40751 (81%)655 (71%)
50711 (77%)636 (68%)
65646 (70%)584 (63%)
75520 (56%)473 (51%)
85441 (47%)397 (43%)

Across all 10,054 studies, recruiting or not: 51% stop at 75 or younger and 42% at 65; 17% take children; 14% are for women only and 3% for men only; 29% take healthy volunteers. From each study’s registry entry; the criteria on its page decide.

How long Pain studies take

Of 295 phase 4 interventional studies under Pain, half reached primary completion within 18 months of starting, counting those still running.

Start to primary completionEvery sponsorIndustryNon-industry
Phase 19 mo3–29 · 221 studies4 mo1–9 · 104 studies23 mo9–45 · 117 studies
Phase 1/211 mo7–36 · 34 studies——
Phase 221 mo7–40 · 186 studies8 mo5–19 · 62 studies33 mo13–60 · 124 studies
Phase 2/320 mo13–30 · 41 studies—21 mo13–51 · 35 studies
Phase 318 mo9–38 · 215 studies13 mo8–23 · 105 studies30 mo14–50 · 110 studies
Phase 418 mo8–33 · 295 studies—18 mo10–35 · 280 studies
Interventional, no phase10 mo4–23 · 3,830 studies13 mo4–30 · 99 studies10 mo4–23 · 3,731 studies
Observational18 mo8–41 · 519 studies—18 mo8–42 · 504 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 11, 2026.

Started recruiting20

Show 15 more

Results posted5

Stopped1

Newly registered61

Show 45 more

and 11 more not listed

Studies

Recruiting first, then most recently updated. Showing 50 of 10,054. Browse all 10,054 → or search them.