Febuxostat Versus Allopurinol or Placebo in Patients With Hyperuricosuria and Calcium Oxalate Stones
|Hyperuricosuria Kidney Stones||Drug: Febuxostat Drug: Allopurinol Drug: Placebo||Phase 2|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
|Official Title:||A Multicenter, Randomized, Double-Blind, Placebo and Allopurinol Controlled, Phase 2 Study to Evaluate Febuxostat in the Medical Management of Subjects With Hyperuricosuria and Calcium Oxalate Stones|
- Percent Change From Baseline to Month 6 in 24-hour Urine Uric Acid (uUA) Excretion [ Time Frame: Baseline and Month 6 ]The change from Baseline to Month 6 in 24-hour urine uric acid is expressed as a percentage of the Baseline uUA value.
- Percent Change From Baseline to Month 6 in the In-plane Diameter of the Largest Calcium Oxalate (CaOx) Stone [ Time Frame: Baseline and Month 6 ]Multidetector Computed Tomography (MDCT) was used to visualize and measure calcium oxalate kidney stones at Baseline and after 6 months of treatment. All MDCT images were analyzed independently by a Central Reader. The change from Baseline to month 6 is expressed as a percentage of the Baseline largest in-plane diameter.
- Change From Baseline to Month 6 in the Number of Calcium Oxalate Stones [ Time Frame: Baseline and Month 6 ]Multidetector Computed Tomography (MDCT) was used to visualize and count calcium oxalate kidney stones at Baseline and after 6 months of treatment. All MDCT images were analyzed independently by a Central Reader.
- Change From Baseline to Month 6 in 24-hour Measured Creatinine Clearance [ Time Frame: Baseline and Month 6 ]Creatinine clearance is a measure of how well the kidneys are filtering creatinine, a waste product produced by the muscles. Measured creatinine clearance was calculated according to the following: Urine 24 hour Creatinine/Serum Creatinine x (total Urine volume/elapsed time) x (1.73/body surface area).
|Study Start Date:||February 2010|
|Study Completion Date:||November 2011|
|Primary Completion Date:||November 2011 (Final data collection date for primary outcome measure)|
Febuxostat 80 mg, capsules, orally, once daily for up to 6 months.
Active Comparator: Allopurinol
Allopurinol 200mg or 300mg (determined by kidney function), capsules, orally, once daily for up to 6 months.
Other Name: Zyloprim
Placebo Comparator: Placebo
Placebo-matching capsules, orally, once daily for up to 6 months.
Nephrolithiasis, also called kidney stone disease, occurs in patients with genetic susceptibility and who may have a broad spectrum of metabolic disorders and other comorbid conditions (for example obesity or diabetes). These renal stones develop as a result of supersaturation. Calcium oxalate (CaOx) is the most common type of stone. Reducing the urinary excretion of uric acid is an established approach for the treatment of CaOx kidney stones.
The objective of this study is to evaluate treatment with febuxostat compared to allopurinol or placebo in the reduction of 24-hour urine uric acid (uUA) excretion levels in hyperuricosuric patients with a recent history of renal stones and the presence of at least one CaOx stone larger than or equal to 3 mm as seen on Multidetector Computed Tomographic Angiography (MDCT).
Participants in this study will be required to make 4 office visits provide 3 urine samples and undergo 2 MDCT scans (a type of x-ray) of their kidneys.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01077284
Show 28 Study Locations
|Study Director:||Senior Medical Director Clinical Science||Takeda|