Common antibiotic could tame rare calcium disorder

NCT ID NCT03301038

First seen Jun 22, 2026 · Last updated Jun 22, 2026

Summary

This study tests whether the antibiotic rifampin can safely lower high calcium levels in the blood and urine of people with a rare genetic mutation in the CYP24A1 gene. The condition can cause kidney stones and other problems. Sixty participants aged 6 months to 65 years will take rifampin for 16 weeks, with regular monitoring of calcium and related markers.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Children's Hospital of Philadelphia

    RECRUITING

    Philadelphia, Pennsylvania, 19104, United States

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

    Contact

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

Rifampin (an antibiotic)

What this could lead to

If it works, this could offer a way to manage dangerously high calcium levels in people with this rare genetic condition, reducing kidney damage and other complications.

What could go wrong

This is a small, early-phase trial with only 60 people. Rifampin may not lower calcium enough, or side effects like liver issues or allergic reactions could limit its use.

Conditions

The condition(s) this trial relates to.

Genetic Diseases, Inborn Hypercalcemia Hypercalcemia, Idiopathic, of Infancy Hypercalciuria Hypercalciuric Hypercalcemia Nephrocalcinosis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.