Last reviewed · How we verify
Calcium Citrate with Vitamin D2
Calcium citrate provides bioavailable calcium for bone mineralization and metabolic function, while vitamin D2 enhances intestinal calcium absorption and regulates calcium-phosphate homeostasis.
Calcium citrate provides bioavailable calcium for bone mineralization and metabolic function, while vitamin D2 enhances intestinal calcium absorption and regulates calcium-phosphate homeostasis. Used for Calcium and vitamin D deficiency, Osteoporosis prevention and treatment, Hypoparathyroidism.
At a glance
| Generic name | Calcium Citrate with Vitamin D2 |
|---|---|
| Also known as | Citracal |
| Sponsor | University of Texas Southwestern Medical Center |
| Drug class | Mineral supplement with vitamin |
| Modality | Small molecule |
| Therapeutic area | Bone health / Metabolic disorders |
| Phase | FDA-approved |
Mechanism of action
Calcium citrate is a soluble calcium salt that does not require gastric acid for absorption, making it suitable for patients with achlorhydria or those taking acid-suppressing medications. Vitamin D2 (ergocalciferol) acts as a hormone precursor, undergoing hepatic and renal hydroxylation to form the active metabolite calcitriol, which increases intestinal calcium and phosphate absorption and promotes bone mineralization. Together, these agents address calcium and vitamin D deficiency.
Approved indications
- Calcium and vitamin D deficiency
- Osteoporosis prevention and treatment
- Hypoparathyroidism
Common side effects
- Hypercalcemia
- Gastrointestinal upset
- Constipation
- Kidney stone formation
Key clinical trials
- Vitamin D Homeostasis in Sarcoidosis (PHASE4)
Primary sources
Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.
| Source | Used for |
|---|---|
| ClinicalTrials.gov | Trial enrolment, design, endpoints, results |
Competitive intelligence
For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape: