Vitamin d pill aims to tame parathyroid glands in dialysis patients

NCT ID NCT03602261

First seen Apr 18, 2026 · Last updated Apr 28, 2026 · Updated 1 time

Summary

This study tested a vitamin D pill (CTAP101) to treat overactive parathyroid glands in people with advanced kidney disease who need regular dialysis. The goal was to raise vitamin D levels and lower parathyroid hormone. The study was stopped early, and only 44 people took part.

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Contacts and locations

Locations

  • AKDHC Medical Research Services

    Peoria, Arizona, 85381, United States

  • AKDHC Medical Research Services

    Phoenix, Arizona, 85027, United States

  • AKDHC Medical Research Services

    Phoenix, Arizona, 85035, United States

  • AKDHC Medical Research Services

    Phoenix, Arizona, 85258, United States

  • California Institute of Renal Research CKD/Dialysis & Transplant Division

    La Mesa, California, 91942, United States

  • Hacienda Dialysis Center

    Hacienda Heights, California, 91745, United States

  • Kidney & Hypertension Specialists

    San Antonio, Texas, 78207, United States

  • Laurel Canyon Dialysis, LLC

    Sun Valley, California, 91352, United States

  • Long Beach Quest Dialysis Center

    Long Beach, California, 90807, United States

  • North America Research Institute, Inc.

    San Dimas, California, 91773, United States

  • Northshore University Health

    Evanston, Illinois, 60201, United States

  • Ontario Dialysis Center

    Ontario, California, 91762, United States

  • Renal and Transplant Associates of New England

    Springfield, Massachusetts, 01107, United States

  • Research by Design, LLC

    Chicago, Illinois, 60643, United States

  • Southwest Houston Research LTD

    Houston, Texas, 77099, United States

  • Southwest MS Nephrology

    McComb, Mississippi, 39601, United States

  • University of Colorado Denver Anschutz Medical Campus

    Aurora, Colorado, 80045, United States

  • WCCT Global, Inc.

    Cypress, California, 90630, United States

Conditions

Explore the condition pages connected to this study.