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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Levothyroxine Clear all
Recruiting Phase 2Phase 3 Interventional

A Study to Assess the Safety and Efficacy of Oral Armour Thyroid Compared to Synthetic T4 for the Treatment of Primary Hypothyroidism in Adult Participants

NCT06345339
View directory record Official record
Conditions
Hypothyroidism
Interventions
Armour Thyroid, Levothyroxine
Drug
Lead sponsor
AbbVie
Industry
Eligibility
18 Years to 75 Years
Enrollment
2,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
134
States / cities
Birmingham, Alabama • Bonita, California • Burbank, California + 109 more
Source: ClinicalTrials.gov public record
Updated Jan 4, 2026 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 1 Interventional Results available

Thyroid Hormone for Remyelination in Multiple Sclerosis (MS): A Safety and Dose Finding Study

NCT02760056
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Liothyronine sodium, Placebo
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 50 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 18, 2018 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Pediatric Fracture Analgesia Study

NCT00520442
View directory record Official record
Conditions
Fracture
Interventions
ibuprofen, acetamin w codeine
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
4 Years to 18 Years
Enrollment
335 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2007
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 6, 2008 · Synced Sep 23, 2026, 2:47 PM EDT
Completed No phase listed Observational

Improving White Matter Integrity With Thyroid Hormone

NCT04098991
View directory record Official record
Conditions
Hypothyroidism
Interventions
Levothyroxine
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
21 Years to 60 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 9, 2020 · Synced Sep 23, 2026, 2:47 PM EDT
Recruiting Phase 1Phase 2 Interventional

Liothyronine in Combination With BIT Regimen for Medulloblastoma With or Without Minimal Residual Disease

NCT07346157
View directory record Official record
Conditions
Medulloblastoma, Medulloblastoma, Childhood, Medulloblastoma Recurrent
Interventions
Liothyronine (L-T3), Bevacizumab, Irinotecan, Temozolomide (TMZ)
Drug
Lead sponsor
Sabine Mueller, MD, PhD
Other
Eligibility
1 Year to 25 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
2
States / cities
San Francisco, California • Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 23, 2026 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Fasting Study of Levothyroxine Sodium Tablets 300 μg to Synthroid® Tablets 300 μg

NCT00647855
View directory record Official record
Conditions
Healthy
Interventions
Levothyroxine Sodium Tablets 300 μg, Synthroid® Tablets 300 μg
Drug
Lead sponsor
Mylan Pharmaceuticals Inc
Industry
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Apr 23, 2024 · Synced Sep 23, 2026, 2:47 PM EDT
Not yet recruiting Phase 2 Interventional

T4/T3 Therapy in Hypothyroidism

NCT07424183
View directory record Official record
Conditions
Hypothyroidism Primary
Interventions
Liothyronine (L-T3), Levothyroxine Sodium (LT4) Tablets, Liothyronine (LT3) placebo
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 3 Interventional

Triiodothyronine (T3) Supplementation in the Treatment of Bipolar and Unipolar Depression.

NCT00158990
View directory record Official record
Conditions
Major Depression, Bipolar Disorder, Unipolar Depression
Interventions
triiodothyronine, sertraline
Drug
Lead sponsor
Hadassah Medical Organization
Other
Eligibility
18 Years to 70 Years
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2007
U.S. locations
1
States / cities
Princeton, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 3, 2007 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 2Phase 3 Interventional

Supraphysiological Doses of Levothyroxine as Adjunctive Therapy in Bipolar Depression

NCT01528839
View directory record Official record
Conditions
Bipolar Disorder
Interventions
L-Thyroxine, Placebo
Drug
Lead sponsor
Charite University, Berlin, Germany
Other
Eligibility
18 Years to 65 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 7, 2012 · Synced Sep 23, 2026, 2:47 PM EDT
Active, not recruiting Phase 2 Interventional

Treatment of ARDS With Instilled T3

NCT04115514
View directory record Official record
Conditions
ARDS, Human, Lung, Wet, Thyroid, Pulmonary Edema, Lung Inflammation
Interventions
Liothyronine Sodium (T3+0.9% sodium chloride) modified formulation specifically for airway instillation., Non-intervention
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
2
States / cities
Edina, Minnesota • Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Developing Oral LT3 Therapy for Heart Failure - HFpEF

NCT04111536
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction, Low Triiodothyronine Syndrome
Interventions
liothyronine, Placebo
Drug · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 2 Interventional Results available

Thyroid and Glucose and Energy Metabolism

NCT00106119
View directory record Official record
Conditions
Thyroid Diseases
Interventions
Liothyronine and Levothyroxine
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2013
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 22, 2015 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 3 Interventional Results available

Liothyronine (T3) for Bipolar Depression

NCT00790738
View directory record Official record
Conditions
Depression, Bipolar Disorder
Interventions
Liothyronine (T3), placebo
Drug
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 65 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Glen Oaks, New York
Source: ClinicalTrials.gov public record
Updated Jul 1, 2015 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 3 Interventional

Study of Triostat in Infants During Heart Surgery

NCT00027417
View directory record Official record
Conditions
Heart Defects, Congenital
Interventions
Liothyronine sodium/triiodothyronine, Cardiopulmonary bypass and cardiac surgery
Drug · Procedure
Lead sponsor
Michael Portman
Other
Eligibility
Up to 2 Years
Enrollment
195 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2007
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 4, 2013 · Synced Sep 23, 2026, 2:47 PM EDT
Withdrawn Phase 3 Interventional Accepts healthy volunteers

Study of Thyroid Hormones in Prematures

NCT02103998
View directory record Official record
Conditions
Transient Hypothyroxinemia of Prematurity (THOP)
Interventions
thryoid hormone T4 + oral potassium iodide (KI) for 42 days, D5W - 5% dextrose water
Drug
Lead sponsor
New York Medical College
Other
Eligibility
1 Hour to 24 Hours
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Valhalla, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2019 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 1 Interventional

Study of T3 on the Incidence of Atrial Fibrillation in Patients Undergoing Cardiac Surgery

NCT00289367
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
triiodothyronine
Drug
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 85 Years
Enrollment
280 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated May 19, 2008 · Synced Sep 23, 2026, 2:47 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Thyroid and Fat Tissue Metabolism

NCT00312715
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Sep 23, 2026, 2:47 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Desiccated Thyroid Extract Versus Synthetic T3/T4 Combination (ThyrolarTM) Versus L-T4 Alone in the Therapy of Primary Hypothyroidism With Special Attention to the Gene Polymorphism

NCT02317926
View directory record Official record
Conditions
Hypothyroidism
Interventions
Levothyroxine, Levothyroxine Plus Liothyronine, Desiccated Thyroid Extract
Drug
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
81 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2015
U.S. locations
1
States / cities
Besthesda, Maryland
Source: ClinicalTrials.gov public record
Updated May 5, 2015 · Synced Sep 23, 2026, 2:47 PM EDT
Withdrawn Phase 4 Interventional

Mean Percentage of Levothyroxine Dosage Increase in Patients With Hypothyroidism Started on Enteral Feeding

NCT02577367
View directory record Official record
Conditions
Hypothyroidism
Interventions
Levothyroxine
Drug
Lead sponsor
Jocelyne Karam
Other
Eligibility
18 Years to 100 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Sep 21, 2021 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 1 Interventional

Open-label Study of Liothyronine in MS

NCT02506751
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting, Multiple Sclerosis, Secondary Progressive, Multiple Sclerosis, Primary Progressive
Interventions
liothyronine
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 58 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 11, 2018 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 2 Interventional

A Study Evaluation the Safety and Efficacy of Hormone Replacement Therapy With North Star Compared to Levothyroxine in Patients With Primary Hypothyroidism

NCT05712421
View directory record Official record
Conditions
Hypothyroidism
Interventions
North Star, Levothyroxine
Drug
Lead sponsor
Neuvosyn Laboratories, LLC
Industry
Eligibility
18 Years to 75 Years
Enrollment
303 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
31
States / cities
Birmingham, Alabama • Canoga Park, California • Greenbrae, California + 23 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 3 Interventional Results available

Intravenous Thyroxine for Heart-Eligible Organ Donors

NCT04415658
View directory record Official record
Conditions
Brain Death, Heart Failure
Interventions
Thyroxine, Saline
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
14 Years to 55 Years
Enrollment
838 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
14
States / cities
Phoenix, Arizona • San Diego, California • Denver, Colorado + 11 more
Source: ClinicalTrials.gov public record
Updated Jan 9, 2024 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 1 Interventional

Effects of Triiodothyronine (T3) in Ischemic Heart Failure

NCT05384847
View directory record Official record
Conditions
Heart Failure
Interventions
Thyroid hormone T3, Control Group
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years to 80 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 23, 2026, 2:47 PM EDT
Completed Phase 2 Interventional

A Study Evaluating the Safety and Efficacy of Hormone Replacement Therapy With ST-1891 Compared to Levothyroxine in Patients With Primary Hypothyroidism

NCT05412979
View directory record Official record
Conditions
Hypothyroidism
Interventions
ST-1891, Levothyroxine
Drug
Lead sponsor
Sention Therapeutics, LLC
Industry
Eligibility
18 Years to 75 Years
Enrollment
490 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
39
States / cities
Greenbrae, California • Newhall, California • Denver, Colorado + 35 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2024 · Synced Sep 23, 2026, 2:47 PM EDT