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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Calcium Antacid Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Clinical Efficacy of 10% Arginine Bicarbonate Prophylaxis Paste

NCT01072188
View directory record Official record
Conditions
Hypersensitivity
Interventions
Arginine/Calcium Carbonate, Nupro - Fluoride Free
Device
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 70 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Langhorne, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 13, 2011 · Synced Sep 23, 2026, 8:20 PM EDT
Terminated Phase 2 Interventional

Statin Monotherapy for Treatment of Endocrine Metabolic Disease Risk

NCT03113994
View directory record Official record
Conditions
Spinal Cord Injuries, Osteoporosis, Metabolic Syndrome
Interventions
Rosuvastatin Calcium, Placebo Oral Tablet, Coenzyme Q10, Calcium Carbonate, Vitamin D
Drug · Dietary Supplement
Lead sponsor
Dr. B. Catharine. Craven
Other
Eligibility
18 Years to 60 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effects of Carbohydrate in Diet and Supplements on the Gastrointestinal Tolerability of LIK066

NCT03198767
View directory record Official record
Conditions
Obesity
Interventions
LIK066, Carbohydrate 50%, Carbohydrate 25%, Carbohydrate 8%, Carbohydrate 0%, Psyllium, Calcium carbonate
Drug · Dietary Supplement
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 4, 2021 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Assessing Dosing Time and Calcium and Vitamin D on the Relative BA of 35 mg DR Risedronate Dosed With Food

NCT00868907
View directory record Official record
Conditions
Healthy
Interventions
35 mg risedronate DR tablet
Drug
Lead sponsor
Warner Chilcott
Industry
Eligibility
40 Years to 70 Years · Female only
Enrollment
101 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
4
States / cities
Gainesville, Florida • Miami, Florida • Honolulu, Hawaii + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 11, 2011 · Synced Sep 23, 2026, 8:20 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

A Study of Changes in Bone Mineral Density as a Function of Consuming Two Different Forms of Calcium Carbonate

NCT01857154
View directory record Official record
Conditions
Osteopenia, Osteoporosis
Interventions
Micronized Calcium Carbonate, Non-Micronized Calcium Carbonate, Vitamin D3
Dietary Supplement
Lead sponsor
Integrative Health Technologies, Inc.
Network
Eligibility
21 Years and older
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Phase II Study of Ovulation in Obese Women

NCT06306131
View directory record Official record
Conditions
Pregnancy Prevention
Interventions
Levonorgestrel 1.5 milligram, Meloxicam 15 milligram, calcium carbonate 750 milligram
Drug · Other
Lead sponsor
InnovaGyn, Inc.
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 2 Interventional Results available

Treatment of Hypoparathyroidism With Synthetic Human Parathyroid Hormone 1-34

NCT00001304
View directory record Official record
Conditions
Hypoparathyroidism
Interventions
Synthetic Human Parathyroid Hormone 1-34, Calcitriol & Calcium
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
17 Years to 69 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1991 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 14, 2015 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

CARDIA-Salt Sensitivity of Blood Pressure (SSBP)

NCT04258332
View directory record Official record
Conditions
Salt Sensitivity of Blood Pressure, Hypertension
Interventions
High Salt Diet, Low Salt Diet
Dietary Supplement
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
50 Years to 70 Years
Enrollment
281 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
2
States / cities
Birmingham, Alabama • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional Results available

Calcium and Phosphorus Balance and Calcium Kinetics in Patients With Stage 3/4 Chronic Kidney Disease

NCT01161407
View directory record Official record
Conditions
Chronic Kidney Disease
Interventions
1500 mg/d elemental calcium as calcium carbonate, Placebo
Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
35 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 28, 2014 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Nuun Instant on Hydration Status in Active Men and Women

NCT04764565
View directory record Official record
Conditions
Hydration
Interventions
Nuun Instant, Water, Nuun Electrolyte
Dietary Supplement · Other
Lead sponsor
University of Memphis
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 27, 2021 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 3 Interventional Results available

Effect of Zoledronic Acid on Chemotherapy Induced Bone Loss

NCT00352846
View directory record Official record
Conditions
Non-Hodgkin's Lymphoma, Lymphoma
Interventions
Zoledronic Acid, Vitamin D, Calcium Carbonate
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
135 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 1, 2013 · Synced Sep 23, 2026, 8:20 PM EDT
Terminated Phase 3 Interventional

A Study to Determine Effective Prophylaxis and Treatment of Nelfinavir-Associated Diarrhea

NCT00650637
View directory record Official record
Conditions
Diarrhea
Interventions
Calcium Carbonate, nelfinavir, lamivudine, loperamide, Calcium carbonate not administered, lamivudine + zidovudine
Drug · Other
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003
U.S. locations
6
States / cities
Birmingham, Alabama • Fort Lauderdale, Florida • New York, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2011 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Calcium on Tasigna Pharmacokinetics (PK) in Healthy Volunteers

NCT00732888
View directory record Official record
Conditions
Healthy
Interventions
Nilotinib Hydrochloride, calcium carbonate
Drug · Dietary Supplement
Lead sponsor
Jan Beumer
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 17, 2013 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional

A Prospective Open-label Comparison of Two Vitamin D3 Repletion Strategies in Vitamin D Deficient Patients

NCT01650883
View directory record Official record
Conditions
Vitamin D 25 OH Deficiency
Interventions
Cholecalciferol, Cholecalciferol 5,000 IU
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jul 25, 2012 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effect of Chewing a Calcium Supplement Before Fluoride Rinse on Salivary Fluoride

NCT04620252
View directory record Official record
Conditions
Dental Caries
Interventions
Inactive supplement, Tricalcium phosphate supplement, Calcium carbonate supplement, Calcium citrate supplement, Inactive supplement and fluoride mouthwash, Calcium carbonate supplement and fluoride mouthwash, Calcium citrate supplement and fluoride mouthwash
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 99 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 8, 2022 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Soy Nuts and Cardiovascular Risk in Postmenopausal Women

NCT01740076
View directory record Official record
Conditions
Postmenopausal Women
Interventions
soy nuts
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
21 Years and older · Female only
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 21, 2025 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Encapsulated Calcium Absorption in Pregnancy

NCT01678079
View directory record Official record
Conditions
Pregnancy
Interventions
Encapsulated Calcium, Non-capsulated Calcium
Dietary Supplement
Lead sponsor
The Hospital for Sick Children
Other
Eligibility
18 Years to 30 Years · Female only
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
2
States / cities
Baltimore, Maryland • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 17, 2014 · Synced Sep 23, 2026, 8:20 PM EDT
Active, not recruiting Phase 3 Interventional

Ropeginterferon Alfa-2b (P1101) vs. Anagrelide in Essential Thrombocythemia Patients With Hydroxyurea Resistance or Intolerance

NCT04285086
View directory record Official record
Conditions
Essential Thrombocythemia
Interventions
Ropeginterferon alfa-2b, Anagrelide
Biological · Drug
Lead sponsor
PharmaEssentia
Industry
Eligibility
18 Years and older
Enrollment
174 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
4
States / cities
Scottsdale, Arizona • St Louis, Missouri • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Vitamin D HIV Study on Postmenopausal Women

NCT01375010
View directory record Official record
Conditions
HIV
Interventions
Vitamin D3, Placebo, Vitamin Supplements
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 6, 2019 · Synced Sep 23, 2026, 8:20 PM EDT
Recruiting Not applicable Interventional

O. Formigenes Colonization in Calcium Oxalate Kidney Stone Disease

NCT06330246
View directory record Official record
Conditions
Kidney Stone, Kidney Calculi, Urolithiasis, Urolithiasis, Calcium Oxalate, Nephrolithiasis, Nephrolithiasis, Calcium Oxalate, Oxalate Urolithiasis, Oxaluria
Interventions
Low oxalate fixed diets pre-colonization, Moderately high oxalate fixed diets pre-colonization, Colonization with Oxalobacter formigenes, Low oxalate fixed diets post-colonization, Moderately high oxalate fixed diets post-colonization
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2031
U.S. locations
2
States / cities
Birmingham, Alabama • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 2 Interventional

Phase II Randomized Study of Alendronate Sodium for Osteopenia in Patients With Gaucher's Disease

NCT00004488
View directory record Official record
Conditions
Gaucher's Disease, Osteopenia
Interventions
alendronate sodium, calcium carbonate, cholecalciferol
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years to 50 Years
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2002
U.S. locations
2
States / cities
Cincinnati, Ohio • Dayton, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 24, 2015 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Clinical Efficacy of a Toothpaste on Hypersensitivity Reduction

NCT01040169
View directory record Official record
Conditions
Hypersensitivity
Interventions
Arginine/Calcium Carbonate, Mint Prophy paste - Fluoride free
Device
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 70 Years
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 9, 2013 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D and Calcium Homeostasis for Prevention of Type 2 Diabetes

NCT00436475
View directory record Official record
Conditions
Glucose Intolerance, Type 2 Diabetes Mellitus, Metabolic Syndrome
Interventions
Vitamin D3 2,000 IU orally once daily, Calcium Carbonate 400 mg orally twice daily, Vitamin D3-Placebo, Calcium-Placebo
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
40 Years and older
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 29, 2019 · Synced Sep 23, 2026, 8:20 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Vitamin D and Calcium Study

NCT00857831
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Vitamin D and Calcium
Dietary Supplement
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 2, 2012 · Synced Sep 23, 2026, 8:20 PM EDT