# Primary Hyperparathyroidism (PHPT): Early Effect of Vitamin D

> **NCT01329666** · PHASE2,PHASE3 · WITHDRAWN · sponsor: **Columbia University**

## Conditions studied

- Primary Hyperparathyroidism
- Hypercalcemia
- Vitamin D Deficiency
- Osteoporosis
- Osteopenia

## Interventions

- **DIETARY_SUPPLEMENT:** Placebo
- **DIETARY_SUPPLEMENT:** Vitamin D3

## Key facts

- **NCT ID:** NCT01329666
- **Lead sponsor:** Columbia University
- **Sponsor class:** OTHER
- **Phase:** PHASE2,PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2010-05
- **Primary completion:** 2015-01
- **Final completion:** 2015-01
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Poor enrollment
- **Last updated:** 2015-03-05

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01329666

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01329666, "Primary Hyperparathyroidism (PHPT): Early Effect of Vitamin D". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT01329666. Licensed CC0.

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