Oral 25-hydroxyvitamin D3 and COVID-19
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ClinicalTrials.gov Identifier: NCT04386850 |
Recruitment Status : Unknown
Verified May 2020 by Tehran University of Medical Sciences.
Recruitment status was: Recruiting
First Posted : May 13, 2020
Last Update Posted : June 12, 2020
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Condition or disease | Intervention/treatment | Phase |
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COVID 19 | Drug: Oral 25-Hydroxyvitamin D3 | Phase 2 Phase 3 |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 1500 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | This is a multicenter randomized double-blinded placebo-controlled clinical trial with parallel groups and allocation 1:1. |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Masking Description: | All subjects in a stratified random sampling method based on age, sex, BMI and serum level of 25(OH)D (<10 ng/dL vs 10 to <20 ng/dL) with serum calcium <=10.6 mg/dL will be recruited in the 25(OH)D3 or placebo group. The clinical coordinator will determine this with a computer-generated randomization program. Subjects in the case group will receive 25 mcg of 25(OH)D3 once daily at bedtime for 2 months and the control group will receive placebo daily for 2 months. |
Primary Purpose: | Prevention |
Official Title: | Preventive and Therapeutic Effects of Oral 25-hydroxyvitamin D3 on Coronavirus (COVID-19) in Adults |
Actual Study Start Date : | April 14, 2020 |
Estimated Primary Completion Date : | November 15, 2020 |
Estimated Study Completion Date : | March 15, 2021 |

Arm | Intervention/treatment |
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Experimental: Treatment
Infected patients with acute respiratory tract infection symptoms (e.g. fever, cough, dyspnea) with no other etiology that fully explains the clinical presentation accompanied by chest computed tomography (CT) scan findings compatible with Covid-19 or with a COVID-19 positive test by the polymerase chain reaction (PCR)
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Drug: Oral 25-Hydroxyvitamin D3
Subjects in the case group will receive 25 mcg of 25(OH)D3 once daily at bedtime for 2 months and the control group will receive placebo daily for 2 months. |
Experimental: Prevention
This arm of study includes the health care providers and hospital workers with a negative test for COVID-19 and a close patient relative with a negative test for COVID-19 who lives with the infected patients.
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Drug: Oral 25-Hydroxyvitamin D3
Subjects in the case group will receive 25 mcg of 25(OH)D3 once daily at bedtime for 2 months and the control group will receive placebo daily for 2 months. |
- COVID-19 (SARA-Cov-2) infection [ Time Frame: 60 days ]Percentage of patients with acute respiratory tract infection symptoms (e.g. fever, cough, dyspnea) with no other etiology that fully explains the clinical presentation accompanied by chest computed tomography (CT) scan findings compatible with Covid-19 or patients with a COVID-19 positive test by the polymerase chain reaction (PCR)
- Severity of COVID-19 (SARA-Cov-2) infection [ Time Frame: 60 days ]Percentage of mild, moderate and sever forms of COVID-19 based on WHO criteria
- Hospitalization [ Time Frame: 60 days ]Percentage of patients who need to be hospitalized
- Disease duration [ Time Frame: 60 days ]Days from the first symptom/positive test to discharge from hospital/negative test
- Death [ Time Frame: 60 days ]Rate of death due to COVID-19 during the study
- Oxygen support [ Time Frame: 60 days ]Percentage of COVID patients who need oxygen support
- Type of oxygen support [ Time Frame: 60 days ]Percentage of COVID patients who require each: Nasal cannula, Non-invasive ventilation or high-flow nasal cannula, Invasive mechanical ventilation, Invasive mechanical ventilation and ECMO
- Symptoms of COVID-19 [ Time Frame: 60 days ]Percentage of COVID patients who display each: fever, dry cough, coughing sputum or blood, sore throat, headache, diarrhea and shortness of breath
- Serum Levels of 25-hydroxyvitamin D3 [ Time Frame: 60 days ]Serum Levels of 25-hydroxyvitamin D3 (ng/ml) by HPLC
- Serum levels of calcium [ Time Frame: 60 days ]Serum calcium concentration (mg/dl)
- Serum levels of phosphorus [ Time Frame: 60 days ]Serum phosphorus concentration (mg/dl)
- Serum levels of creatinine [ Time Frame: 60 days ]Serum creatinine concentration (mg/dl)
- Serum levels of albumin [ Time Frame: 60 days ]Serum albumin concentration (g/dl)
- Serum levels of the blood urea nitrogen (BUN) [ Time Frame: 60 days ]Serum concentration of the blood urea nitrogen (mg/dl)
- Serum levels of the parathyroid hormone (PTH) [ Time Frame: 60 days ]Serum concentration of the parathyroid hormone (pg/ml)

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Ages Eligible for Study: | 18 Years to 75 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Older than 18 years old and younger than 75 years old for all study groups.
- Meet the diagnostic criteria of COVID-19 for different types (including ordinary type, heavy type and critical type) in infected patients.
- No medications or disorders that would affect vitamin D metabolism
- Women must be on birth control and not pregnant
- Ability and willingness to give informed consent and comply with protocol requirements
Exclusion Criteria:
- Ongoing treatment with pharmacologic doses of vitamin D, vitamin D metabolites or analogues
- Pregnant or lactating women;
- Severe underlying diseases, such as advanced malignant tumors, endstage lung disease, etc.
- History of elevated serum calcium >10.6 mg/dl; that is corrected for albumin concentration or subjects with a history of hypercalciuria and kidney stones.
- Chronic hepatic dysfunction, chronic kidney disease or intestinal malabsorption syndromes including inflammatory bowel disease.
- Supplementation with over the counter formulations of vitamin D2 or vitamin D3
- Use of tanning bed or artificial UV exposure within the last two weeks.
- Consuming medication affecting vitamin D metabolism or absorption (anticonvulsants, anti-tuberculosis medication glucocorticoids, HIV medications and cholestyramine).
- Subjects with a history of an adverse reaction to orally administered vitamin D, vitamin D metabolites or analogues.
- Subjects with a history of conditions that can lead to high serum calcium levels such as sarcoidosis, tuberculosis and some lymphomas associated with activated macrophages which increase the production of 1,25(OH)2D.
- Inability to give informed consent

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04386850
Contact: Zhila Maghbooli, PhD | +98 21 6670 6142 | zhilayas@gmail.com | |
Contact: Arash Shirvani, MD, PhD | hn@bu.edu |
Iran, Islamic Republic of | |
Tehran University of Medical Sciences | Recruiting |
Tehran, Iran, Islamic Republic of | |
Contact: Zhila Maghbooli, PhD +98 21 6670 6142 zhilayas@gmail.com |
Study Chair: | Mohamadali Sahraian, MD | Tehran University of Medical Sciences | |
Principal Investigator: | zhila Maghbooli, PhD | Tehran University of Medical Sciences | |
Principal Investigator: | Michael F Holick, PhD,MD | Boston University | |
Principal Investigator: | Arash Shirvani, MD, PhD | Boston University |
Responsible Party: | Tehran University of Medical Sciences |
ClinicalTrials.gov Identifier: | NCT04386850 |
Other Study ID Numbers: |
IRCT2020-0401046909N2 IRCT20200401046909N1 ( Registry Identifier: IRCT ) IRCT2020-0401046909N2 ( Registry Identifier: IRCT ) |
First Posted: | May 13, 2020 Key Record Dates |
Last Update Posted: | June 12, 2020 |
Last Verified: | May 2020 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | The datasets used and analyzed during the current study will be available from the Study Principal Investigators (zhilayas@gmeil.com) on reasonable request . |
Supporting Materials: |
Study Protocol Statistical Analysis Plan (SAP) Informed Consent Form (ICF) Clinical Study Report (CSR) Analytic Code |
Time Frame: | Beginning 9 month and ending 36 months following article publication. |
Access Criteria: | Investigators whose proposed use of the data has been approved by the current study principal investigators. |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
COVID 19 Vitamin D 25-hydroxyvitamin D3 1,25-dihydroxyvitamin D3 Viral infection Cytokine storm |
supplementation Clinical Trial Health Care provider Prevention Treatment |
COVID-19 Pneumonia, Viral Pneumonia Respiratory Tract Infections Infections Virus Diseases Coronavirus Infections Coronaviridae Infections Nidovirales Infections |
RNA Virus Infections Lung Diseases Respiratory Tract Diseases Hydroxycholecalciferols Calcifediol Vitamins Micronutrients Physiological Effects of Drugs Bone Density Conservation Agents |