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 are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Jul 22, 2026, 2:21 AM EDT

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

Showing 25–40 of 16 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Porphyria, Erythropoietic Clear all
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 18, 2019 · Synced Jul 22, 2026, 2:21 AM 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 Jun 28, 2026 · Synced Jul 22, 2026, 2:21 AM 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 23, 2026 · Synced Jul 22, 2026, 2:21 AM EDT
Terminated Not applicable Interventional Results available

Effect of Isoniazid on Protoporphyrin Levels in Erythropoietic Protoporphyria

NCT01550705
View directory record Official record
Conditions
Erythropoietic Protoporphyria (EPP), X Linked Erythropoietic Protoporphyria
Interventions
Isoniazid
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 15, 2017 · Synced Jul 22, 2026, 2:21 AM EDT
Completed Phase 3 Interventional Results available

ENVISION: A Study to Evaluate the Efficacy and Safety of Givosiran (ALN-AS1) in Patients With Acute Hepatic Porphyrias (AHP)

NCT03338816
View directory record Official record
Conditions
Acute Hepatic Porphyria, Acute Intermittent Porphyria, Porphyria, Acute Intermittent, Acute Porphyria, Hereditary Coproporphyria (HCP), Variegate Porphyria (VP), ALA Dehydratase Deficient Porphyria (ADP)
Interventions
Givosiran, Placebo
Drug
Lead sponsor
Alnylam Pharmaceuticals
Industry
Eligibility
12 Years and older
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
10
States / cities
Little Rock, Arkansas • San Francisco, California • Boston, Massachusetts + 7 more
Source: ClinicalTrials.gov public record
Updated Apr 21, 2024 · Synced Jul 22, 2026, 2:21 AM EDT
Completed Not applicable Interventional Results available

Oral Iron for Erythropoietic Protoporphyrias

NCT02979249
View directory record Official record
Conditions
Erythropoietic Protoporphyria, EPP, X-linked Protoporphyria, XLP
Interventions
Oral Iron
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
6
States / cities
Birmingham, Alabama • San Francisco, California • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2020 · Synced Jul 22, 2026, 2:21 AM 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 2, 2023 · Synced Jul 22, 2026, 2:21 AM EDT
Recruiting No phase listed Observational

Longitudinal Study of the Porphyrias

NCT01561157
View directory record Official record
Conditions
Acute Porphyrias, Cutaneous Porphyrias
Interventions
Not listed
Lead sponsor
The American Porphyrias Expert Collaborative
Other
Eligibility
1 Minute and older
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2030
U.S. locations
16
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 13 more
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Jul 22, 2026, 2:21 AM EDT
Recruiting No phase listed Observational

ELEVATE, a Registry of Patients With Acute Hepatic Porphyria (AHP)

NCT04883905
View directory record Official record
Conditions
Acute Hepatic Porphyria
Interventions
Not listed
Lead sponsor
Alnylam Pharmaceuticals
Industry
Eligibility
12 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
13
States / cities
Birmingham, Alabama • Gilbert, Arizona • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jul 22, 2026, 2:21 AM EDT
Not listed No phase listed Observational

Studies in Porphyria I: Characterization of Enzyme Defects

NCT00004331
View directory record Official record
Conditions
Porphyria
Interventions
Not listed
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
0 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1992
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 2:21 AM EDT
Completed Phase 2 Interventional Results available

Controlled Trial of Panhematin in Treatment of Acute Attacks of Porphyria

NCT02180412
View directory record Official record
Conditions
Acute Porphyrias
Interventions
Panhematin, Glucose
Biological · Other
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 100 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 10, 2025 · Synced Jul 22, 2026, 2:21 AM 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 27, 2021 · Synced Jul 22, 2026, 2:21 AM EDT
Completed Phase 2Phase 3 Interventional

Porphozym in the Treatment of Acute Attacks in AIP

NCT00418795
View directory record Official record
Conditions
Acute Intermittent Porphyria
Interventions
recombinant human porphobilinogen deaminase (Porphozym)
Drug
Lead sponsor
Zymenex A/S
Industry
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 8, 2018 · Synced Jul 22, 2026, 2:21 AM EDT
Completed No phase listed Observational

Diagnostic and Screening Study of Genetic Disorders

NCT00006057
View directory record Official record
Conditions
Tay-Sachs Disease, Porphyria, Erythropoietic, Leukodystrophy, Globoid Cell, Metabolism, Inborn Errors
Interventions
Not listed
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
0 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 1999
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 2:21 AM EDT
Completed Phase 2 Interventional Results available

Phase II Confirmatory Study in Erythropoietic Protoporphyria (EPP)

NCT01097044
View directory record Official record
Conditions
Erythropoietic Protoporphyria
Interventions
Afamelanotide, Placebo
Drug
Lead sponsor
Clinuvel Pharmaceuticals Limited
Industry
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
6
States / cities
Birmingham, Alabama • San Francisco, California • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Oct 27, 2019 · Synced Jul 22, 2026, 2:21 AM 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 30, 2025 · Synced Jul 22, 2026, 2:21 AM EDT