Sustained reduction in urinary calcium during long-term treatment with slow release neutral potassium phosphate in absorptive hypercalciuria

Howard J. Heller, Alfredo A. Reza-Albarrán, Neil A. Breslau, Charles Y C Pak

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Purpose: We tested whether UroPhos section-K, a new slow release neutral form of potassium phosphate (155 mg. phosphate, 8 mEq. potassium per tablet) in a dose of 4 tablets twice daily would produce a sustained hypocalciuric response and maintain bone mass in patients with absorptive hypercalciuria, a major cause of nephrolithiasis characterized by excessive intestinal calcium absorption accompanied in some patients by excessive bone loss. Materials and Methods: A total of 25 patients with absorptive hypercalciuria were studied in a 4-year, prospective, open trial with UroPhos-K at yearly intervals during a 4-day inpatient physiological study with a constant metabolic diet containing 400 mg. calcium, 100 mEq. sodium and 800 mg. phosphate daily. Results: Treatment with UroPhos-K caused a sustained, marked reduction in urinary calcium (264 to 181 mg. daily). Fractional 47calcium absorption decreased modestly (74.0 to 64.6%) commensurate with a reduction in serum 1,25-dihydroxyvitamin D (42 to 34 pg./ml.). Intact parathyroid hormone increased within the normal range (30 to 42 pg./ml.). Bone mineral density was stable at the lumbar spine, femoral neck and distal third of the radius. Conclusions: UroPhos-K may provide a long-term alternative for hypercalciuric patients in whom thiazide therapy fails.

Original languageEnglish (US)
Pages (from-to)1451-1456
Number of pages6
JournalJournal of Urology
Volume159
Issue number5
DOIs
StatePublished - May 1998

Keywords

  • Bone density
  • Calcium
  • Delayed-action preparations
  • Phosphates
  • Urinary calculi

ASJC Scopus subject areas

  • Urology

Fingerprint Dive into the research topics of 'Sustained reduction in urinary calcium during long-term treatment with slow release neutral potassium phosphate in absorptive hypercalciuria'. Together they form a unique fingerprint.

  • Cite this