Daily Vitamin D for Sickle-cell Respiratory Complications

About the study

This study aims to answer the question whether daily oral vitamin D supplementation can
reduce the risk of respiratory or lung complications in children and adolescents with sickle
cell disease. Respiratory problems are the leading causes of sickness and of death in sickle
cell disease. The investigators hypothesize that daily oral vitamin D3, compared to monthly
oral vitamin D, will rapidly increase circulating vitamin D3, and reduce the rate of
respiratory complications by 50% or more within the first year of supplementation in children
and adolescents with sickle cell disease.

This study is funded by the FDA Office of Orphan Products Development (OOPD).

Study point of contact

Margaret T Lee, MD
212 305 6290
[email protected]
Gary M Brittenham, MD
212 305 7005
[email protected]


1 United States site


3 to 20 Years


Hb SS, Hb SC


Phase 2

Study type








participation requirements

1. Diagnosis of sickle cell disease (Hb SS, Hb SC, Hb S-Beta-thalassemia)

2. Age 3-20 years old

participation restrictions

1. Patient unwilling or unable to provide written informed consent (and assent, if

2. Patient unable or unwilling to comply with requirements of the clinical trial

3. Participation in another clinical trial

4. Current diagnosis of rickets

5. History of hypercalcemia or diagnosis of any medical condition associated with
hypercalcemia, including primary hyperparathyroidism, malignancy, sarcoidosis,
tuberculosis, granulomatous disease, familial hypocalciuric hypercalcemia

6. Current use of corticosteroids, excluding inhaled steroids

7. Current use of anticonvulsants (phenytoin, phenobarbital, carbamazepine)

8. Therapy with thiazide diuretics or lithium carbonate

9. Known liver or renal disease

10. Patients taking medications for pulmonary complications of sickle cell disease not on
a stable dose of medications, as defined by a change in medications or doses within
the three months prior to study entry

11. Patients on chronic red blood cell transfusion therapy


  • New York, New York, United States, Columbia University Medical Center, 10032 [Recruiting]
Last updated 2021-09-30