Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Placebo Effect: later-stage trial registry
1 of 4 indexed Placebo Effect trials are currently recruiting, with more weight in Phase 3-4.
Corpus placement: #4,115 of 28,707 conditions by registered trial count.
4 US clinical trials · 1 currently recruiting · #4,115 of 28,707 conditions by registered trial count
Placebo Effect: 4 US clinical trials tracked, 1 recruiting.
Placebo Effect is the subject of 4 registered US clinical trials on ClinicalTrials.gov, 1 of them currently open to new participants. 1 are in Phase 3-4 (later-stage) and 0 in Phase 1-2 (earlier-stage). The most active sponsor is Trustees of Dartmouth College, running 1 of these trials.
Enrollment posture brief
Registry condition placebo-effect
OPEN 1 | RECR 25% | LATE 1 | EARLY 0 | RANK #4115 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Abdominal Cancer (25% recruiting · 8 trials)
Placebo Effect lists 1 open slots (25% of 4 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Placebo Effect on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Placebo Effect is recruiting below its size-band peers.
1 of 4 indexed trials (25%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
Open and recent trials
4 total, page 1 of 1
Neural Mechanisms of Interpersonal Expectations on Negative Affect
Trustees of Dartmouth College
NCT06980090
A Tool to Help Patients With Muscle Symptoms After Taking a Statin Medication.
University of Utah
NCT06423365
Effects of Open-label vs Double-blind Treatment in IBS
Beth Israel Deaconess Medical Center
NCT02802241
The Effect of Tablet Size on Cognitive Performance Caffeine
University of Colorado, Denver
NCT03694886
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Placebo Effect records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Placebo Effect trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Placebo Effect page
4 registered trials, 1 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 1 Placebo Effect trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Trustees of Dartmouth College sponsors the most Placebo Effect trials on record, review their full trial history before evaluating a specific study. See Trustees of Dartmouth College's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Placebo Effect condition card totals 4 registered trials; most-linked intervention Placebo - small sucrose pill; top US site state Colorado. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.