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Showing 1–24 of 61 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral ferrous sulfate Clear all
Withdrawn Not applicable Interventional

Capsule Endoscopy Versus Conservative Therapy for Obscure Gastrointestinal Bleeding

NCT01837030
View directory record Official record
Conditions
Hemorrhage, Anemia
Interventions
Ferrous sulfate, Capsule Endoscopy
Dietary Supplement · Device
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 13, 2018 · Synced Sep 24, 2026, 2:00 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Iron Supplementation and Intestinal Health

NCT04497012
View directory record Official record
Conditions
Anemia of Prematurity, Very Low Birth Weight Infant
Interventions
2mg/kg/day Iron Sulfate, 6 mg/kg/day Iron Sulfate
Drug
Lead sponsor
University of South Florida
Other
Eligibility
1 Day to 6 Months
Enrollment
183 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jan 21, 2025 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Not applicable Interventional Results available

Does a Daily Iron Tablet Improve Anemia in Cystic Fibrosis

NCT01755455
View directory record Official record
Conditions
Cystic Fibrosis, Anemia, Iron-Deficiency
Interventions
Ferrous sulfate 325mg, Placebo
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 70 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
2
States / cities
Portland, Maine • Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Mar 15, 2017 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Intravenous Iron vs. Oral Iron Supplementation for Postpartum Anemia

NCT05047211
View directory record Official record
Conditions
Anemia, Iron Deficiency, Delivery Complication
Interventions
Ferrous sulfate, Iron dextran
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 28, 2023 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Ferrous Sulfate on the Pharmacokinetics of AKB-6548

NCT02327546
View directory record Official record
Conditions
Healthy Volunteers
Interventions
AKB-6548, Ferrous Sulfate
Drug
Lead sponsor
Akebia Therapeutics
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Kalamazoo, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 13, 2018 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 3 Interventional Results available

Ferric Carboxymaltose (FCM) Assessment in Subjects With Iron Deficiency Anaemia and Non-dialysis-dependent Chronic Kidney Disease (NDD-CKD)

NCT00994318
View directory record Official record
Conditions
Iron Deficiency Anaemia, Chronic Kidney Disease
Interventions
FCM (Ferric carboxymaltose) high ferritin target, FCM (Ferric carboxymaltose) low ferritin target, Oral Iron (Ferrous sulphate)
Drug
Lead sponsor
Vifor Pharma
Industry
Eligibility
18 Years and older
Enrollment
626 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
Wilmington, North Carolina
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced Sep 24, 2026, 2:00 PM EDT
Recruiting Phase 4 Interventional

Early Antenatal Support for Iron Deficiency Anemia

NCT04278651
View directory record Official record
Conditions
Pregnancy Related, Anemia, Iron Deficiency, Anemia of Pregnancy
Interventions
Ferumoxytol, Ferrous Sulfate
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Trial Comparing Iron Supplementation Versus Routine Iron Intake in Very Low Birth Weight Infants

NCT01125163
View directory record Official record
Conditions
Iron Deficiency Anemia
Interventions
Iron Supplement, multivitamin
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
24 Weeks to 32 Weeks
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 3, 2019 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Anemia Studies in CKD: Erythropoiesis Via a Novel Prolyl Hydroxylase Inhibitor (PHI) Daprodustat- Iron (ASCEND: Fe)

NCT03457701
View directory record Official record
Conditions
Anaemia
Interventions
Daprodustat, rhEPO, Ferrous sulfate containing the stable iron isotope (57Fe), Ferrous sulfate containing the stable iron isotope (58Fe)
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
3
States / cities
Fort Worth, Texas • Lufkin, Texas • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2024 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 3 Interventional Results available

Comparison of Oral Ferrous Sulfate to Intravenous Ferumoxytol in Antepartum Iron Deficiency Anemia

NCT04253626
View directory record Official record
Conditions
Pregnancy Related, Anemia, Iron Deficiency
Interventions
Ferumoxytol Injection [Feraheme], Ferrous Sulfate
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older · Female only
Enrollment
83 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 24, 2026, 2:00 PM EDT
Recruiting Phase 3 Interventional

Intravenous Versus Oral Iron for Treating Iron-Deficiency Anemia in Pregnancy

NCT05462704
View directory record Official record
Conditions
Iron Deficiency Anemia, Pregnancy
Interventions
Ferric derisomaltose, Ferrous sulfate
Drug
Lead sponsor
Women and Infants Hospital of Rhode Island
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
8
States / cities
Birmingham, Alabama • Miami, Florida • Ann Arbor, Michigan + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Sep 24, 2026, 2:00 PM 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 Sep 24, 2026, 2:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy of a Low Dose, Oral, Liquid Iron Supplement on Restoring Inadequate Blood Iron to Normal Levels

NCT05257343
View directory record Official record
Conditions
Iron Deficiency (Without Anemia)
Interventions
Liquid Placebo Supplementation, Liquid Iron Supplement (Blood Builder ®)
Dietary Supplement
Lead sponsor
Applied Science & Performance Institute
Industry
Eligibility
18 Years and older · Female only
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated May 29, 2023 · Synced Sep 24, 2026, 2:00 PM EDT
Terminated Phase 4 Interventional Results available

Daily Versus Alternate Day Iron Supplementation for the Treatment of Iron Deficiency Anemia in Pregnancy

NCT04594070
View directory record Official record
Conditions
Pregnancy Related, Iron Deficiency Anemia of Pregnancy
Interventions
Ferrous sulfate
Drug
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 23, 2024 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Iron Supplementation and Side Effects

NCT04018300
View directory record Official record
Conditions
Iron Deficiency Anemia, Iron Overload
Interventions
Ferrous sulfate, Aspiron, Placebo
Dietary Supplement · Other
Lead sponsor
Iowa State University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Ames, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 11, 2019 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Efficacy of Enteral Iron Supplementation in Critical Illness

NCT00450177
View directory record Official record
Conditions
Anemic, Critically Ill Patients
Interventions
Ferrous Sulfate, Placebo Oral Tablet
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 3 Interventional Results available

Comparison of the Safety and Efficacy of Intravenous Iron Versus Oral Iron in the Treatment of Anemia Secondary to Heavy Uterine Bleeding

NCT00395993
View directory record Official record
Conditions
Anemia
Interventions
Ferric Carboxymaltose (FCM), Ferrous Sulfate tablets
Drug
Lead sponsor
American Regent, Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
456 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2006
U.S. locations
1
States / cities
Norristown, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 19, 2018 · Synced Sep 24, 2026, 2:00 PM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Intravenous Iron Versus Oral Iron for the Treatment of Iron Deficiency Anemia

NCT06366698
View directory record Official record
Conditions
Iron Deficiency Anemia of Pregnancy
Interventions
Venofer 200 MG Per 10 ML Injection, Ferrous sulfate
Drug
Lead sponsor
Arrowhead Regional Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
900 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Colton, California
Source: ClinicalTrials.gov public record
Updated Apr 15, 2024 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 3 Interventional Results available

Darbepoetin Alfa With or Without Iron in Treating Anemia Caused By Chemotherapy in Patients With Cancer

NCT00661999
View directory record Official record
Conditions
Anemia, Leukemia, Lymphoma, Lymphoproliferative Disorder, Multiple Myeloma and Plasma Cell Neoplasm, Precancerous Condition, Unspecified Adult Solid Tumor, Protocol Specific
Interventions
darbepoetin alfa, ferrous sulfate, sodium ferric gluconate complex in sucrose, placebo
Biological · Dietary Supplement · Drug + 1 more
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
502 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
2
States / cities
Scottsdale, Arizona • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 16, 2011 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 3 Interventional Results available

Oral Iron Versus Oral Iron Plus a Web-based Behavioral Intervention in Young Children (IRONCHILD)

NCT04371536
View directory record Official record
Conditions
Iron Deficiency Anemia, Iron-deficiency
Interventions
Ferrous Sulfate, IRONCHILD
Drug · Behavioral
Lead sponsor
Baylor College of Medicine
Other
Eligibility
12 Months to 48 Months
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 24, 2026, 2:00 PM EDT
Recruiting Phase 4 Interventional

Oral Iron Supplementation on Alternate vs. Consecutive Days for Iron Deficiency Anemia in Pregnancy

NCT06492512
View directory record Official record
Conditions
Iron-deficiency Anemia (IDA), Pregnancy
Interventions
daily ferrous sulfate with an equivalent elemental iron dose of 65 mg per pill, alternate day ferrous sulfate with an equivalent elemental iron dose of 65 mg per pill
Drug
Lead sponsor
Southern Illinois University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Springfield, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 24, 2026, 2:00 PM EDT
Terminated Phase 4 Interventional Results available

Oral Iron Frequency for Childhood Restless Leg Syndrome/Periodic Limb Movement Disorder

NCT04610827
View directory record Official record
Conditions
Sleep Disorder, Restless Legs Syndrome, Periodic Limb Movement Sleep Disorder, Iron-deficiency
Interventions
Ferrous sulfate
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
2 Years to 10 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 21, 2024 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Pilot Study: Randomized, Placebo-controlled Comparator Trial of IV vs Oral Iron Treatment of RLS With IDA. (IVOR-IDA)

NCT02499354
View directory record Official record
Conditions
Restless Legs Syndrome, Iron Deficiency Anemia
Interventions
Ferumoxytol intravenous, Ferrous sulfate
Drug
Lead sponsor
Auerbach Hematology Oncology Associates P C
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 29, 2024 · Synced Sep 24, 2026, 2:00 PM EDT
Completed Phase 3 Interventional

Intravenous Infusions of Ferumoxytol Compared to Oral Ferrous Sulfate for the Treatment of Anemia in Pregnancy

NCT03657433
View directory record Official record
Conditions
Iron Deficiency Anemia of Pregnancy
Interventions
Ferrous sulfate 325mg, Ferumoxytol
Dietary Supplement · Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 6, 2022 · Synced Sep 24, 2026, 2:00 PM EDT