Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Porphyria Cutanea Tarda: early-phase trial registry
A small indexed set (2 trials) with no open enrollment listed right now.
Corpus placement: #7,188 of 28,707 conditions by registered trial count.
2 US clinical trials · none currently recruiting · #7,188 of 28,707 conditions by registered trial count
Porphyria Cutanea Tarda: 2 US clinical trials tracked, none currently recruiting.
Porphyria Cutanea Tarda is the subject of 2 registered US clinical trials on ClinicalTrials.gov, none currently recruiting. 0 are in Phase 3-4 (later-stage) and 1 in Phase 1-2 (earlier-stage). The most active sponsor is National Center for Research Resources (NCRR), running 1 of these trials.
Enrollment posture brief
Registry condition porphyria-cutanea-tarda
OPEN 0 | RECR 0% | LATE 0 | EARLY 1 | RANK #7188 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Accelerated Phase Chronic Myelogenous Leukemia (0% recruiting · 12 trials)
Porphyria Cutanea Tarda has no open enrollment in this registry pull (2 archived studies). Peers show how other volume-matched labels compare on open share. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Porphyria Cutanea Tarda 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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Porphyria Cutanea Tarda is recruiting below its size-band peers.
0 of 2 indexed trials (0%) 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.
Indexed trials (enrollment closed)
2 total, page 1 of 1
Study of the Pathogenesis of Porphyria Cutanea Tarda
National Center for Research Resources (NCRR)
NCT00005103
Hydroxychloroquine and Phlebotomy for Treating Porphyria Cutanea Tarda
The University of Texas Medical Branch, Galveston
NCT01573754
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 2 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Porphyria Cutanea Tarda records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Porphyria Cutanea Tarda 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 Porphyria Cutanea Tarda page
2 registered trials, 0 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- No Porphyria Cutanea Tarda trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
- National Center for Research Resources (NCRR) sponsors the most Porphyria Cutanea Tarda trials on record, review their full trial history before evaluating a specific study. See National Center for Research Resources (NCRR)'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 Porphyria Cutanea Tarda condition card totals 2 registered trials; most-linked intervention Hydroxychloroquine; top US site state Texas. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.