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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Calcitriol Clear all
Completed Phase 1 Interventional

Calcitriol Plus Dexamethasone in Treating Patients With Prostate Cancer That Has Not Responded to Hormone Therapy

NCT00010231
View directory record Official record
Conditions
Prostate Cancer
Interventions
calcitriol, dexamethasone
Dietary Supplement · Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older · Male only
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2002
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 29, 2015 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Early Phase 1 Interventional

Effects of Vitamin D on Renin Expression in Hypertensive Patients

NCT00585442
View directory record Official record
Conditions
Hypertension, Vitamin D Deficiency
Interventions
calcitriol, Placebo
Drug
Lead sponsor
University of Utah
Other
Eligibility
55 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 4 Interventional Results available

PK and PD Study of Calcitriol 3 mcg/g Ointment in Pediatric Subjects With Plaque Psoriasis

NCT01766440
View directory record Official record
Conditions
Plaque Psoriasis
Interventions
Calcitriol 3 mcg/g ointment
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
2 Years to 12 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
8
States / cities
San Diego, California • Indianapolis, Indiana • Ann Arbor, Michigan + 5 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2021 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Calcitriol in Combination With Ketoconazole and Therapeutic Hydrocortisone in Treating Patients With Prostate Cancer

NCT00536991
View directory record Official record
Conditions
Prostate Adenocarcinoma, Recurrent Prostate Carcinoma, Stage III Prostate Cancer, Stage IV Prostate Cancer
Interventions
Calcitriol, Ketoconazole, Laboratory Biomarker Analysis, Pharmacological Study, Therapeutic Hydrocortisone
Dietary Supplement · Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2016
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 13, 2017 · Synced Sep 18, 2026, 5:06 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 18, 2026, 5:06 PM EDT
Suspended Phase 2 Interventional

A Study of Gemcitabine ± Erlotinib and DN-101 Versus Gemcitabine ± Erlotinib and Placebo in Patients With Advanced Pancreatic Cancer

NCT00536770
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
placebo + gemcitabine + erlotinib, Placebo + gemcitabine, calcitriol + gemcitabine, calcitriol + gemcitabine + erlotinib
Drug
Lead sponsor
Novacea
Industry
Eligibility
18 Years and older
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 5, 2007 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Phase 4 Interventional Results available

Management of Mineral and Bone Disease in Hemodialysis-Calcitriol vs. Paricalcitol

NCT01725113
View directory record Official record
Conditions
Kidney Failure, Secondary Hyperparathyroidism, Hyperphosphatemia, Hypercalcemia
Interventions
Calcitriol, Paricalcitol
Drug
Lead sponsor
Winthrop University Hospital
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Mineola, New York
Source: ClinicalTrials.gov public record
Updated Nov 6, 2023 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Different Vitamin D Preparations & FGF23 in Humans

NCT00957879
View directory record Official record
Conditions
Vitamin D Deficiency
Interventions
Ergocalciferol, Calcitriol
Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 45 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 18, 2012 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Phase 4 Interventional

Evaluate the Survival Benefits of Zemplar Versus Calcijex in Subjects w/ Stage V Chronic Kidney Disease on Hemodialysis

NCT00062699
View directory record Official record
Conditions
End-Stage Kidney Disease
Interventions
Zemplar (paricalcitol injection), Calcijex
Drug
Lead sponsor
Abbott
Industry
Eligibility
20 Years and older
Enrollment
2,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
60
States / cities
Tuscaloosa, Alabama • Inglewood, California • Los Angeles, California + 40 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2006 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 4 Interventional Results available

Maintain Respiratory Muscle Function and Reduce Pneumonia Risk in Cancer Patients

NCT03469271
View directory record Official record
Conditions
Cancer
Interventions
1,25 (OH)2 D3, Inspiratory isometric resistance training, Oral Placebo, Sham Inspiratory Isometric Resistance Training, Threshold Inspiratory Muscle Trainer (IMT)
Drug · Other · Device
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 25, 2023 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Early Phase 1 Interventional

Vitamin D and Cocaine Administration

NCT04826133
View directory record Official record
Conditions
Cocaine Use Disorder
Interventions
Calcitriol, Placebo
Drug · Other
Lead sponsor
Yale University
Other
Eligibility
30 Years to 55 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 13, 2023 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Tumor Necrosis Factor Decreases Vitamin D Dependant Calcium Absorption

NCT00427804
View directory record Official record
Conditions
Rheumatoid Arthritis, Crohn's Disease
Interventions
calcitriol
Drug
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
18 Years to 50 Years · Male only
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 3, 2013 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated No phase listed Observational Results available

Study to Evaluate Safety of Vitamin D Receptor Activators in Patients Ages 0 to 16 With Chronic Kidney Disease Stage 5 Receiving Peritoneal Dialysis Within Current Clinical Practice

NCT01134315
View directory record Official record
Conditions
Secondary Hyperparathyroidism, End-Stage Renal Disease
Interventions
Paricalcitol, Calcitriol
Drug
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
Up to 16 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
18
States / cities
Birmingham, Alabama • Gainesville, Florida • Orlando, Florida + 15 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2013 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 2 Interventional Results available

Activated Vitamin D for the Prevention and Treatment of Acute Kidney Injury

NCT02962102
View directory record Official record
Conditions
Critically Ill, Acute Kidney Injury
Interventions
Calcifediol, Calcitriol, Placebos
Drug
Lead sponsor
David Leaf
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 28, 2025 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 4 Interventional Results available

Vitamin D and Coronary Calcification Study

NCT00752102
View directory record Official record
Conditions
Chronic Kidney Disease, Vitamin D Deficiency, Coronary Calcification, Disorders of Calcium and Bone Metabolism
Interventions
Calcitriol (Rocaltrol®), Paricalcitol
Drug
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
25 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 7, 2017 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 2 Interventional

Bone Response to Enzyme Replacement in Gaucher's Disease

NCT00001416
View directory record Official record
Conditions
Gaucher's Disease
Interventions
CEREDASE™
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1993 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 21, 2016 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Not applicable Interventional Results available

Calcitriol in Preventing Lung Cancer in Smokers and Former Smokers at High Risk of Lung Cancer

NCT00690924
View directory record Official record
Conditions
Lung Cancer, Precancerous Condition, Tobacco Use Disorder
Interventions
calcitriol, laboratory biomarker analysis, pharmacological study
Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
40 Years to 79 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2018
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jun 3, 2018 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 1 Interventional Results available

A Study to Evaluate and Compare the Efficacy and Pharmacokinetics of MK-0873 for the Treatment of Plaque Psoriasis (MK-0873-022)

NCT01235728
View directory record Official record
Conditions
Psoriasis, Plaque Psoriasis
Interventions
MK-0873 2% Cream, MK-0873 vehicle (placebo) Cream, Calcitriol Cream
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
2
States / cities
Fort Myers, Florida • Miramar, Florida
Source: ClinicalTrials.gov public record
Updated Feb 7, 2019 · Synced Sep 18, 2026, 5:06 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Vitamin D and Blood Pressure

NCT00459563
View directory record Official record
Conditions
Hypertension
Interventions
Vitamin D, calcitriol, Placebo
Drug
Lead sponsor
Atlanta VA Medical Center
Federal
Eligibility
18 Years to 80 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 7, 2014 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Phase 2 Interventional

A Phase II Trial of Calcitriol and Naproxen in Patients With Recurrent Prostate Cancer

NCT00383487
View directory record Official record
Conditions
Prostatic Neoplasms, Prostate Cancer
Interventions
Calcitriol, Naproxen-n-butyl nitrate
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 90 Years · Male only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jan 27, 2013 · Synced Sep 18, 2026, 5:06 PM EDT
Active, not recruiting Phase 3 Interventional

The ENERGY 3 Study: Evaluation of Efficacy and Safety of INZ-701 in Children With ENPP1 Deficiency

NCT06046820
View directory record Official record
Conditions
Ectonucleotide Pyrophosphatase/Phosphodiesterase1 Deficiency, Autosomal Recessive Hypophosphatemic Rickets, Generalized Arterial Calcification of Infancy
Interventions
INZ-701, Control Arm (Conventional Therapy)
Drug
Lead sponsor
Inozyme Pharma
Industry
Eligibility
1 Year to 12 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
6
States / cities
Aurora, Colorado • Chicago, Illinois • Boston, Massachusetts + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 30, 2025 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 4 Interventional Results available

Trial to Optimize Mineral Outcomes in Dialysis Patients

NCT01100723
View directory record Official record
Conditions
Secondary Hyperparathyroidism, Chronic Kidney Disease
Interventions
Cinacalcet, active vitamin D analogue
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Lynchburg, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 1, 2017 · Synced Sep 18, 2026, 5:06 PM EDT
Completed Phase 2 Interventional

Calcitriol and Dexamethasone in Patients With Myelodysplastic Syndromes

NCT00030069
View directory record Official record
Conditions
Myelodysplastic Syndromes
Interventions
Calcitriol, Dexamethasone
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
Not listed
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 14, 2016 · Synced Sep 18, 2026, 5:06 PM EDT
Terminated Phase 3 Interventional

Chemoprevention of Colorectal Adenomas

NCT00486512
View directory record Official record
Conditions
Adenomatous Polyps
Interventions
0.5 mg calcitriol (1a -25-dihydroxycholecalciferol), 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3), placebo to 0.5 mg calcitriol (1a -25-dihydroxycholecalciferol), placebo to 75 mg acetylsalicylic acid (ASA) + 1250 mg calcium carbonate (CaCO3), Colonoscopy
Drug · Procedure
Lead sponsor
Colotech A/S
Industry
Eligibility
40 Years to 75 Years
Enrollment
350 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
24
States / cities
Huntsville, Alabama • San Diego, California • Clearwater, Florida + 20 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2020 · Synced Sep 18, 2026, 5:06 PM EDT