Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 10, 2026, 1:46 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 41 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Congenital Erythropoietic Porphyria (CEP) Clear all
Recruiting No phase listed Observational

Observational Study of Adults and Adolescents With Erythropoietic Protoporphyria (EPP) and X-linked Porphyria (XLP)

NCT07567131
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP), X-Linked Porphyria (XLP)
Interventions
Not listed
Lead sponsor
Portal Therapeutics, Inc.
Industry
Eligibility
12 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
5
States / cities
Boston, Massachusetts • New York, New York • Wake Forest, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Active, not recruiting No phase listed Observational

Evaluating the Prevalence of Acute Hepatic Porphyria in Postural Tachycardia Syndrome

NCT05344599
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Acute Hepatic Porphyria
Interventions
Autonomic Function Testing, Genetic Testing, Urine Testing, Blood laboratory Testing
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
70 participants
Timeline
2022 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 3 Interventional Results available

Pilot Trial of Deferasirox in the Treatment of Porphyria Cutanea Tarda

NCT00599326
View directory record Official record
Conditions
Porphyria Cutanea Tarda
Interventions
Deferasirox
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Feb 10, 2014 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 3 Interventional Results available

Phase III Confirmatory Study in Erythropoietic Protoporphyria

NCT01605136
View directory record Official record
Conditions
Erythropoietic Protoporphyria
Interventions
Afamelanotide, Placebo
Drug
Lead sponsor
Clinuvel Pharmaceuticals Limited
Industry
Eligibility
18 Years and older
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
7
States / cities
Birmingham, Alabama • San Francisco, California • Detroit, Michigan + 4 more
Source: ClinicalTrials.gov public record
Updated Sep 19, 2019 · Synced Oct 10, 2026, 1:46 PM EDT
Completed No phase listed Observational Results available

Erythropoietic Protoporphyrias: Studies of the Natural History, Genotype-Phenotype Correlations, and Psychosocial Impact

NCT01688895
View directory record Official record
Conditions
Erythropoietic Protoporphyria, EPP, X-Linked Protoporphyria, XLP, XLPP, X-Linked Dominant Erythropoietic Protoporphyria, XLEPP, XLDP
Interventions
Not listed
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
Not listed
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
6
States / cities
Birmingham, Alabama • San Francisco, California • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 17, 2020 · Synced Oct 10, 2026, 1:46 PM EDT
Recruiting Phase 1Phase 2 Interventional

A Study to Investigate the Improvement of Photosensitivity in Terms of Skin Lesions Associated With CEP Following Administration of Oral ATL-001 (Ciclopirox Oral Solution) in Participants Aged >18 Years of Age With CEP

NCT07024316
View directory record Official record
Conditions
Congenital Erythropoietic Porphyria (CEP)
Interventions
ATL-001 (Ciclopirox oral solution)
Drug
Lead sponsor
Atlas Molecular Pharma
Industry
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Terminated No phase listed Observational

INSIGHT-AHP: A Study to Characterize the Prevalence of Acute Hepatic Porphyria (AHP) in Patients With Clinical Presentation and History Consistent With AHP

NCT03547297
View directory record Official record
Conditions
Acute Hepatic Porphyria, Hepatic Porphyrias, Acute Intermittent Porphyria (AIP), Hereditary Coproporphyria (HCP), Variegate Porphyria (VP), ALA Dehydratase Deficient Porphyria (ADP), Porphyria Acute
Interventions
Not listed
Lead sponsor
Alnylam Pharmaceuticals
Industry
Eligibility
16 Years and older
Enrollment
212 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
12
States / cities
Pasadena, California • Jacksonville, Florida • Margate, Florida + 9 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2019 · Synced Oct 10, 2026, 1:46 PM EDT
Completed No phase listed Observational

Evidence-based Assessment of Medication Sensitivity in Acute Hepatic Porphyria

NCT03906214
View directory record Official record
Conditions
Porphyrias
Interventions
Web-based Survey
Other
Lead sponsor
University of South Florida
Other
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Oct 16, 2019 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2 Interventional Results available

Harvoni Treatment Porphyria Cutanea Tarda

NCT03118674
View directory record Official record
Conditions
Porphyria Cutanea Tarda, Hepatitis C
Interventions
Harvoni
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
3
States / cities
San Francisco, California • Winston-Salem, North Carolina • Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 3, 2023 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2 Interventional Results available

Study to Evaluate Efficacy, Safety, and Tolerability of MT-7117 in Subjects With Erythropoietic Protoporphyria

NCT03520036
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP)
Interventions
MT-7117 low dose, MT-7117 high dose, Placebo
Drug
Lead sponsor
Tanabe Pharma America, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
9
States / cities
Los Angeles, California • San Francisco, California • Miami, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 31, 2025 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2 Interventional Results available

Effect of Oral Cimetidine in the Protoporphyrias

NCT05020184
View directory record Official record
Conditions
Erythropoietic Protoporphyria, X-linked Protoporphyria
Interventions
Cimetidine, Placebo
Drug
Lead sponsor
Amy K. Dickey, M.D.
Other
Eligibility
15 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
3
States / cities
Boston, Massachusetts • Winston-Salem, North Carolina • Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 4, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed No phase listed Observational

Study of the Pathogenesis of Porphyria Cutanea Tarda

NCT00005103
View directory record Official record
Conditions
Porphyria Cutanea Tarda
Interventions
Not listed
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
0 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2000
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 24, 2005 · Synced Oct 10, 2026, 1:46 PM EDT
Completed No phase listed Observational

Clinical Diagnosis of Acute Porphyria

NCT01568554
View directory record Official record
Conditions
Hereditary Coproporphyria (HCP), Acute Intermittent Porphyria (AIP), Variegate Porphyria (VP)
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
15 Years and older
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
6
States / cities
Birmingham, Alabama • San Francisco, California • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2021 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 3 Interventional

INcreased Sun Exposure Without Pain In Research Participants With EPP or XLP

NCT06144840
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP), X-Linked Protoporphyria (XLP)
Interventions
Dersimelagon, Placebo
Drug
Lead sponsor
Tanabe Pharma America, Inc.
Industry
Eligibility
12 Years to 75 Years
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
13
States / cities
Huntington Beach, California • San Francisco, California • Miami, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Sorbent Therapy of the Cutaneous Porphyrias

NCT01422915
View directory record Official record
Conditions
Erythropoietic Protoporphyria
Interventions
Colestipol
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
22 Years to 60 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Oct 10, 2026, 1:46 PM EDT
Available No phase listed Expanded access

Expanded Access Program of Bitopertin For Participants With EPP or XLP

NCT07603401
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP), X-Linked Protoporphyria (XLP)
Interventions
DISC-1459
Drug
Lead sponsor
Disc Medicine, Inc
Industry
Eligibility
12 Years and older
U.S. locations
7
States / cities
Miami, Florida • Boston, Massachusetts • Detroit, Michigan + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 1 Interventional

A Phase 1 Study of Givosiran (ALN-AS1) in Patients With Acute Intermittent Porphyria (AIP)

NCT02452372
View directory record Official record
Conditions
Acute Intermittent Porphyria
Interventions
givosiran (ALN-AS1), Sterile Normal Saline (0.9% NaCl)
Drug
Lead sponsor
Alnylam Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
4
States / cities
Birmingham, Alabama • San Francisco, California • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Oct 10, 2026, 1:46 PM EDT
Enrolling by invitation Phase 2Phase 3 Interventional

HELIOS: Open-Label, Long-Term Extension Study to Investigate the Safety, Tolerability, and Efficacy of DISC-1459 (Bitopertin) in Participants With EPP or XLP

NCT05883748
View directory record Official record
Conditions
Erythropoietic Protoporphyria
Interventions
DISC-1459
Drug
Lead sponsor
Disc Medicine, Inc
Industry
Eligibility
12 Years and older
Enrollment
230 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
11
States / cities
Birmingham, Alabama • San Francisco, California • Miami, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2 Interventional Results available

Study of Bitopertin to Evaluate the Safety, Tolerability, Efficacy, and PPIX Concentrations in Participants With EPP

NCT05308472
View directory record Official record
Conditions
Erythropoietic Protoporphyria
Interventions
DISC-1459, Placebo
Drug
Lead sponsor
Disc Medicine, Inc
Industry
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
9
States / cities
Birmingham, Alabama • San Francisco, California • Miami, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Recruiting No phase listed Observational

Identification of Acute Intermittent Porphyria Modifying Genes

NCT05502133
View directory record Official record
Conditions
Acute Intermittent Porphyria (AIP)
Interventions
Not listed
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
12 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2 Interventional

GATEWAY: A Phase 2a Study of PORT-77 in Adults With Erythropoietic Protoporphyria

NCT06971900
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP)
Interventions
PORT-77, Placebo
Drug
Lead sponsor
Portal Therapeutics, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Phase 2 Interventional Results available

Hydroxychloroquine and Phlebotomy for Treating Porphyria Cutanea Tarda

NCT01573754
View directory record Official record
Conditions
Porphyria Cutanea Tarda
Interventions
Hydroxychloroquine, Phlebotomy
Drug · Procedure
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 100 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2021
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 17, 2023 · Synced Oct 10, 2026, 1:46 PM EDT
Recruiting Phase 2Phase 3 Interventional

A Study to Investigate PORT-77 Oral Dosing Compared With Placebo in Participants With Erythropoietic Protoporphyria (EPP) or X-linked Protoporphyria (XLP)

NCT07820085
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP), X-Linked Protoporphyria (XLP), EPP2
Interventions
PORT-77, Placebo
Drug
Lead sponsor
Portal Therapeutics, Inc.
Industry
Eligibility
12 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
2
States / cities
Huntington Beach, California • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 10, 2026, 1:46 PM EDT
Completed Not applicable Interventional

Studies in Porphyria IV: Gonadotropin-Releasing Hormone (GnRH) Analogues for Prevention of Cyclic Attacks

NCT00004330
View directory record Official record
Conditions
Porphyria
Interventions
luteinizing hormone-releasing factor
Drug
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
18 Years to 55 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1987
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 24, 2005 · Synced Oct 10, 2026, 1:46 PM EDT