Also known as 1,25(OH)2-D3, 1,25-DHCC, 1,25-Dihydroxycholecalciferol, 1?,25(OH)2D3, 1?,25-dihydroxycholecalciferol, 1?,25-dihydroxyvitamin D3, 1alpha,25(OH)2D3, 1alpha,25-Dihydroxycholecalciferol, 1alpha,25-Dihydroxyvitamin D3, Calcijex, Calcitriolum, Decostriol, Rocaltrol

A synthetic physiologically-active analog of vitamin D, specifically the vitamin D3 form. Calcitriol regulates calcium in vivo by promoting absorption in the intestine, reabsorption in the kidneys, and, along with parathyroid hormone, regulation of bone growth. A calcitriol receptor-binding protein appears to exist in the mucosa of human intestine. Calcitriol also induces cell cycle arrest at G0/G1 phase of the cell cycle, cell differentiation, and apoptosis, resulting in inhibition of proliferation of some tumor cell types. This agent may be chemopreventive for colon and prostate cancers. (NCI04)

Originator: NCI Thesaurus | Source: The website of the National Cancer Institute (

Can I take Calcitriol while breastfeeding?

Calcitriol is the normal physiologically active form of vitamin D, 1,25-dihydroxyvitamin D. Limited data indicate that its use in nursing mothers in appropriately adjusted doses does not affect the breastfed infant. If calcitriol is required by the mother, it is not a reason to discontinue breastfeeding. Calcitriol and calcium dosage requirements are usually reduced during lactation in women with hypoparathyroidism.[1][2][3][4][5][6][7][8] The American Academy of Pediatrics recommends the administration of a minimum of 400 IU of vitamin D daily to all infants, children and adolescents.[9]

Drug levels

Maternal Levels. Relevant published information was not found as of the revision date.

Infant Levels. Relevant published information was not found as of the revision date.

Effects in breastfed infants

Maternal Levels. Relevant published information was not found as of the revision date.

Infant Levels. Relevant published information was not found as of the revision date.

Possible effects on lactation

Relevant published information was not found as of the revision date.


1. Sweeney LL, Malabanan AO, Rosen H. Decreased calcitriol requirements during pregnancy and lactation, with a window of increased requirements immediately postpartum. Endocr Pract. 2010;1-11. PMID: 20061285

2. Cathebras P, Cartry O, Sassolas G, Rousset H. [Hypercalcemia induced by lactation in 2 patients with treated hypoparathyroidism]. Rev Med Interne. 1996;17:675-6. PMID: 8881196

3. Caplan RH, Wickus GG. Reduced calcitriol requirements for treating hypoparathyroidism during lactation. A case report. J Reprod Med. 1993;38:914-8. PMID: 8277494

4. Caplan RH, Beguin EA. Hypercalcemia in a calcitriol-treated hypoparathyroid woman during lactation. Obstet Gynecol. 1990;76 (3 Pt 2):485-9. PMID: 2381632

5. Cundy T, Haining SA, Guilland-Cumming DF et al. Remission of hypoparathyroidism during lactation: evidence for a physiological role for prolactin in the regulation of vitamin D metabolism. Clin Endocrinol (Oxf). 1987;26:667-74. PMID: 3665123

6. Mather KJ, Chik CL, Corenblum B. Maintenance of serum calcium by parathyroid hormone-related peptide during lactation in a hypoparathyroid patient. J Clin Endocrinol Metab. 1999;84:424-7. PMID: 10022395

7. Rude RK, Haussler MR, Singer FR. Postpartum resolution of hypocalcemia in a lactating hypoparathyroid patient. Endocrinol Jpn. 1984;31:227-33. PMID: 6548698

8. Krysiak R, Kobielusz-Gembala I, Okopien B. Hypoparathyroidism in pregnancy. Gynecol Endocrinol. 2011;27:529-32. PMID: 21463229

9. Wagner CL, Greer FR. Prevention of rickets and vitamin D deficiency in infants, children, and adolescents. Pediatrics. 2008;122:1142-52. PMID: 18977996

10. Callies F, Arlt W, Scholz HJ et al. Management of hypoparathyroidism during pregnancy–report of twelve cases. Eur J Endocrinol. 1998;139:284-9. PMID: 9758437

11. Moretti ME, Verjee Z, Ito S, Koren G. Breast-feeding during maternal use of azathioprine. Ann Pharmacother. 2006;40:2269-72. PMID: 17132809

Last Revision Date


Disclaimer:Information presented in this database is not meant as a substitute for professional judgment. You should consult your healthcare provider for breastfeeding advice related to your particular situation. The U.S. government does not warrant or assume any liability or responsibility for the accuracy or completeness of the information on this Site.

Source: LactMed – National Library of Medicine (NLM)

3D Model of the Calcitriol molecule

MolView – data visualization platform