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Phoslo (Calcium Acetate) - Summary



Rx only

Tablets: Each white round tablet (stamped "BRA200") contains 667 mg of calcium acetate, USP (anhydrous;Ca(CH3 COO) 2; MW=158.17 grams) equal to 169 mg (8.45 mEq) calcium, and 10 mg of the inert binder, polyethylene glycol 8000 NF.

PhosLo is indicated for the control of hyperphosphatemia in end stage renal failure and does not promote aluminum absorption.

See all Phoslo indications & dosage >>


Published Studies Related to Phoslo (Calcium Acetate)

Comparison of Calcium Acetate and Sevelamer on Vascular Function and Fibroblast Growth Factor 23 in CKD Patients: A Randomized Clinical Trial. [2011.11.30]
BACKGROUND: Fibroblast growth factor 23 (FGF-23) is a marker of endothelial dysfunction and atherosclerotic complications in patients with chronic kidney disease (CKD). Because previous studies suggested that sevelamer may exert effects on FGF-23 level and endothelial function independently of its phosphate-lowering action, we tested the effect of sevelamer versus calcium acetate on vascular function and FGF-23 levels... CONCLUSIONS: In hyperphosphatemic patients with stage 4 CKD, treatment with phosphate lowering induces measurable improvements in flow-mediated vasodilatation. Furthermore, independently of serum phosphate level, FGF-23 level changes induced by phosphate binders are associated with simultaneous changes in flow-mediated vasodilatation. These observations are compatible with the hypothesis that FGF-23 may contribute to vascular dysfunction in this population. Copyright (c) 2011 National Kidney Foundation, Inc. Published by Elsevier Inc. All rights reserved.

A randomized, double-blind, placebo-controlled trial of calcium acetate on serum phosphorus concentrations in patients with advanced non-dialysis-dependent chronic kidney disease. [2011.02.16]
BACKGROUND: Hyperphosphatemia in patients with chronic kidney disease (CKD) contributes to secondary hyperparathyroidism, soft tissue calcification, and increased mortality risk. This trial was conducted to examine the efficacy and safety of calcium acetate in controlling serum phosphorus in pre-dialysis patients with CKD... CONCLUSIONS: In CKD patients not yet on dialysis, calcium acetate was effective in reducing serum phosphorus and iPTH over a 12 week period. TRIAL REGISTRATION: www.clinicaltrials.gov NCT00211978.

Fibroblast growth factor 23 in hemodialysis patients: effects of phosphate binder, calcitriol and calcium concentration in the dialysate. [2011]
BACKGROUND: Fibroblast growth factor 23 (FGF23) concentrations increase early in chronic kidney disease (CKD), and the influence of current CKD-mineral and bone disorder (MBD) therapies on serum FGF23 levels is still under investigation... CONCLUSIONS: Taken together, our results confirm that the current CKD-MBD therapies have an effect on serum levels of FGF23. Since FGF23 is emerging as a potential treatment target, our findings should be taken into account in the decision on how to manage CKD-MBD therapy. Copyright (c) 2010 S. Karger AG, Basel.

A randomized, double-blind, placebo-controlled trial of calcium acetate on serum phosphorus concentrations in patients with advanced non-dialysis-dependent chronic kidney disease. [2011]
patients with CKD... CONCLUSIONS: In CKD patients not yet on dialysis, calcium acetate was effective

Short-term efficacy of sevelamer versus calcium acetate in patients with chronic kidney disease stage 3-4. [2010.12]
BACKGROUND: The relative effectiveness and safety of sevelamer, a mineral-free phosphate binder, for treatment of hyperphosphatemia in children with chronic kidney disease is uncertain. AIM: This study was designed to compare the efficacy and acceptability of sevelamer hydrochloride to calcium acetate as a phosphate binder in pediatric patients with chronic kidney disease... CONCLUSIONS: Compared to calcium acetate, use of sevelamer in children with chronic kidney disease is associated with similar reduction in serum phosphate levels, lower risk of hypercalcemia, and marked decrease in serum lipid levels.

more studies >>

Clinical Trials Related to Phoslo (Calcium Acetate)

CARE-2 (Calcium Acetate [PhosLoŽ]/Sevelamer[RenagelŽ] Evaluation Study 2) for Heart Calcification in Dialysis Patients [Completed]
The purpose of the study is to evaluate the effects of two phosphate binders, PhosLo and sevelamer, on heart calcification in dialysis patients. The study will use a non-invasive technique, electron beam computed tomography (CT) scanning, to measure calcium in the coronary arteries, the aortic valve, and the mitral valve.

EPIC(Effect of PhosLo on Phosphorus Levels in Chronic Kidney Disease) [Completed]
The purpose of this study is to determine if calcium acetate (PhosLo) can control serum phosphorus in pre-dialysis patients with moderate to severe impairment of kidney function.

Effect of Phosphate Binders on Markers of Vascular Health in Chronic Kidney Disease Stages 3 and 4 [Recruiting]
Chronic kidney disease (CKD) patients often have high levels of a substance called fibroblast growth factor-23 (FGF-23), a phosphorus excreting hormone, which has been related to heart disease. As kidney function declines, less phosphorus is removed by the kidneys and as a result phosphorus accumulates in the blood. In response to elevated phosphorus levels, more FGF-23 is released to help facilitate the excretion of extra phosphorus into the urine. In addition to effects on FGF-23, increased phosphorus levels can lead to calcification (hardening) of the blood vessels in the CKD population.

Phosphate binding medicines are used in CKD patients to lower the amount of phosphorus absorbed by the stomach and intestines after eating meals and snacks. In patients with CKD, studies have shown that phosphate binders can lower FGF-23 levels in the blood. Lowering FGF-23 levels in CKD patients may also lower substances in the blood that cause calcification of blood vessels in the CKD population.

This study is being done to determine if using phosphate binders, either sevelamer carbonate or calcium acetate, in the earlier stages kidney disease (before dialysis) can decrease FGF-23 and biomarkers (substances in the blood) associated with hardening of the blood vessels and heart disease.

Bioequivalence Study Comparing Calcium Acetate Oral Solution Versus Calcium Acetate Gelcaps in Healthy Volunteers [Recruiting]
To compare the bioequivalence of calcium acetate oral solution vs. calcium acetate gelcaps in healthy volunteers with calcium citrate as a positive control.

Arterial Stiffness and Calcifications in Haemodialysis Patients on Sevelamer or Calcium Acetate [Not yet recruiting]
End-stage renal disease (ESRD) is a state of increased arterial stiffness of extensive vessel calcifications, compared with the non-renal population. Both arterial stiffness and arterial calcifications are potent predictors of all-cause and cardiovascular mortality in ESRD patients. Several studies have documented the direct relationship between the extent and severity of arterial/coronary calcifications and outcome in dialysis patients. The relationship is strong no matter if arterial calcifications were quantified by electron-beam computed tomography or a radiological calcification score. Calcifications are early and progressive events in these patients. PWV is strongly related to the degree of sonographic determined arterial calcifications and EBCT-derived coronary artery calcium score in chronic kidney disease patients.

Calcium-based phosphate binders are associated with progressive coronary artery and aortic calcification, especially when mineral metabolism is not well controlled.

According to recent studies, sevelamer hydrochloride is a potent non-calcium-containing phosphate binder, well tolerated in ESRD. Compared with calcium-based phosphate binders, sevelamer is less likely to cause hypercalcemia, low levels of PTH, and progressive coronary and aortic calcification in hemodialysis patients. Moreover, sevelamer has a favorable effect on the lipid profile.

Less is known about the relationship between sevelamer treatment and progression of arterial stiffness. To date, there is one single study examining the influence of sevelamer (versus calcium carbonate) on the evolution of arterial stiffness in a very small number (N=15) of haemodialysis patients. These study used the same patients as historical controls, thus

being methodologically rather weak. Moreover, the follow-up was quite short - 6 month.

The aim of the trial is to to quantify, in a randomized opened-labeled controlled trial the effect of sevelamer hydrochloride on the evolution of arterial stiffness parameters (pulse wave velocity and the augmentation index) in chronic haemodialysis patients and to correlate these parameters with arterial calcification assessed by a previous described radiological score of arterial calcification and echocardiographic parameters (left ventricular hypertrophy, LV dilatation, systolic and diastolic dysfunction).

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Page last updated: 2013-02-10

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