Label: CALCIUM ACETATE capsule
- NDC Code(s): 23155-531-02, 23155-531-10
- Packager: Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc.
- Category: HUMAN PRESCRIPTION DRUG LABEL
- DEA Schedule: None
- Marketing Status: Abbreviated New Drug Application
Updated March 24, 2022
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HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use Calcium Acetate Capsules safely and effectively. See full prescribing information for Calcium Acetate Capsules.
CALCIUM ACETATE capsules, 667 mg, for oral use.
Initial U.S. Approval: 1990
INDICATIONS AND USAGE
- Calcium acetate capsule is a phosphate binder indicated for the reduction of serum phosphorus in patients with end stage renal disease. (1)
DOSAGE AND ADMINISTRATION
DOSAGE FORMS AND STRENGTHS
- Capsule: 667 mg calcium acetate capsule.(3)
- Hypercalcemia. (4)
WARNINGS AND PRECAUTIONS
- The most common (>10%) adverse reactions are hypercalcemia, nausea, and vomiting. (6.1).
- In clinical studies, patients have occasionally experienced nausea during calcium acetate therapy. (6).
To report SUSPECTED ADVERSE REACTIONS, contact Avet Pharmaceuticals Inc. at 1-866-901-DRUG (3784) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
- Calcium acetate capsule may decrease the bioavailability of tetracyclines or fluoroquinolones. (7)
- When clinically significant drug interactions are expected, administer the drug at least one hour before or at least three hours after calcium acetate capsule, or consider monitoring blood levels of the drug. (7)
See 17 for PATIENT COUNSELING INFORMATION.
Table of Contents
FULL PRESCRIBING INFORMATION: CONTENTS*
- Sections or subsections omitted from the full prescribing information are not listed.
- 1 INDICATIONS AND USAGE
- 2 DOSAGE AND ADMINISTRATION
- 3 DOSAGE FORMS AND STRENGTHS
- 4 CONTRAINDICATIONS
5 WARNINGS AND PRECAUTIONS
Patients with end stage renal disease may develop hypercalcemia when treated with calcium, including calcium acetate. Avoid the use of calcium supplements, including calcium-based nonprescription antacids, concurrently with calcium acetate.
An overdose of calcium acetate may lead to progressive hypercalcemia, which may require emergency measures. Therefore, early in the treatment phase during the dosage adjustment period, monitor serum calcium levels twice weekly. Should hypercalcemia develop, reduce the calcium acetate dosage or discontinue the treatment, depending on the severity of hypercalcemia.
More severe hypercalcemia (Ca>12 mg/dL) is associated with confusion, delirium, stupor and coma. Severe hypercalcemia can be treated by acute hemodialysis and discontinuing calcium acetate therapy.
Mild hypercalcemia (10.5 to 11.9 mg/dL) may be asymptomatic or manifest as constipation, anorexia, nausea, and vomiting. Mild hypercalcemia is usually controlled by reducing the calcium acetate dose or temporarily discontinuing therapy. Decreasing or discontinuing Vitamin D therapy is recommended as well.
Chronic hypercalcemia may lead to vascular calcification and other soft-tissue calcification. Radiographic evaluation of suspected anatomical regions may be helpful in early detection of soft tissue calcification. The long term effect of calcium acetate on the progression of vascular or soft tissue calcification has not been determined.
Hypercalcemia (>11 mg/dL) was reported in 16% of patients in a 3-month study of a solid dose formulation of calcium acetate; all cases resolved upon lowering the dose or discontinuing treatment.
Maintain the serum calcium-phosphorus (Ca x P) product below 55 mg2/dL2.
6 ADVERSE REACTIONS
Hypercalcemia is discussed elsewhere [see Warnings and Precautions (5.1)].
6.1 Clinical Trial Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
In clinical studies, calcium acetate has been generally well tolerated.
Calcium acetate was studied in a 3-month, open-label, non-randomized study of 98 enrolled ESRD hemodialysis patients and in a two week double-blind, placebo-controlled, cross-over study with 69 enrolled ESRD hemodialysis patients. Adverse reactions (>2% on treatment) from these trials are presented in Table 1.
Table 1: Adverse Reactions in Patients with End-Stage Renal Disease Undergoing Hemodialysis Preferred Term
Total adverse reactions reported for
3 – mo , open-label study of calcium acetate
n = 98
Double-blind , placebo-controlled , cross over study of calcium acetate
n = 69
n = 167
Mild hypercalcemia may be asymptomatic or manifest itself as constipation, anorexia, nausea, and vomiting. More severe hypercalcemia is associated with confusion, delirium, stupor, and coma. Decreasing dialysate calcium concentration could reduce the incidence and severity of calcium acetate-induced hypercalcemia. Isolated cases of pruritus have been reported, which may represent allergic reactions.
6.2 Postmarketing Experience
The following additional adverse reactions have been identified during post-approval of calcium acetate: dizziness, edema, and weakness.
7 DRUG INTERACTIONS
The drug interaction of calcium acetate is characterized by the potential of calcium to bind to drugs with anionic functions (e.g., carboxyl and hydroxyl groups). Calcium acetate capsule may decrease the bioavailability of tetracyclines or fluoroquinolones via this mechanism.
There are no empirical data on avoiding drug interactions between calcium acetate and most concomitant drugs. When administering an oral medication with calcium acetate where a reduction in the bioavailability of that medication would have a clinically significant effect on its safety or efficacy, administer the drug one hour before or three hours after calcium acetate. Monitor blood levels of the concomitant drugs that have a narrow therapeutic range. Patients taking anti-arrhythmic medications for the control of arrhythmias and anti-seizure medications for the control of seizure disorders were excluded from the clinical trials with all forms of calcium acetate.
8 USE IN SPECIFIC POPULATIONS
Calcium acetate capsules contains calcium acetate. Animal reproduction studies have not been conducted with calcium acetate, and there are no adequate and well controlled studies of calcium acetate use in pregnant women. Patients with end stage renal disease may develop hypercalcemia with calcium acetate treatment [see Warnings and Precautions (5.1)]. Maintenance of normal serum calcium levels is important for maternal and fetal well being. Hypercalcemia during pregnancy may increase the risk for maternal and neonatal complications such as stillbirth, preterm delivery, and neonatal hypocalcemia and hypoparathyroidism. Calcium acetate treatment, as recommended, is not expected to harm a fetus if maternal calcium levels are properly monitored during and following treatment.
8.3 NURSING MOTHERS
Calcium acetate capsule contains calcium acetate and is excreted in human milk. Human milk feeding by a mother receiving calcium acetate is not expected to harm an infant, provided maternal serum calcium levels are appropriately monitored.
8.5 GERIATRIC USE
Clinical studies of calcium acetate did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
Administration of calcium acetate capsule in excess of the appropriate daily dosage may result in hypercalcemia [see Warnings and Precautions (5.1)].
Calcium acetate capsules, USP are hard gelatin capsules with blue opaque cap and body both imprinted "HP 531" in black ink. Each capsule contains 667 mg calcium acetate, USP (anhydrous; Ca(CH3COO)2; MW=158.17 grams) equal to 169 mg (8.45 mEq) calcium and following inactive ingredients crospovidone, FD&C Blue No. 1, FD&C Blue No. 3, gelatin, magnesium stearate, sodium lauryl sulfate and titanium dioxide. In addition to the ingredients listed above, each capsule contains following inactive ingredients from imprinting ink: butyl alcohol, iron oxide black, propylene glycol and shellac.
12 CLINICAL PHARMACOLOGY
Patients with ESRD retain phosphorus and can develop hyperphosphatemia. High serum phosphorus can precipitate serum calcium resulting in ectopic calcification. Hyperphosphatemia also plays a role in the development of secondary hyperparathyroidism in patients with ESRD.
12.1 MECHANISM OF ACTION
Calcium acetate, when taken with meals, combines with dietary phosphate to form an insoluble calcium phosphate complex, which is excreted in the feces, resulting in decreased serum phosphorus concentration.
Orally administered calcium acetate from pharmaceutical dosage forms is systemically absorbed up to approximately 40% under fasting conditions and up to approximately 30% under non-fasting conditions. This range represents data from both healthy subjects and renal dialysis patients under various conditions.
- 13 NONCLINICAL TOXICOLOGY
14 CLINICAL STUDIES
Ninety-one patients with end-stage renal disease who were undergoing hemodialysis and were hyperphosphatemic (serum phosphorus >5.5 mg/dL) following a 1-week phosphate binder washout period contributed efficacy data to an open-label, non-randomized study.
The patients received calcium acetate 667 mg tablets at each meal for a period of 12 weeks. The initial starting dose was 2 tablets per meal for 3 meals a day, and the dose was adjusted as necessary to control serum phosphorus levels. The average final dose after 12 weeks of treatment was 3.4 tablets per meal. Although there was a decrease in serum phosphorus, in the absence of a control group the true magnitude of effect is uncertain.
The data presented in Table 2 demonstrate the efficacy of calcium acetate in the treatment of hyperphosphatemia in end-stage renal disease patients. The effects on serum calcium levels are also presented.
Table 2: Average Serum Phosphorous and Calcium Levels at Pre-Study, Interim and Study Completion Time points
aValues expressed as mean ± SE.
bNinety-one patients completed at least 6 weeks of the study.
cANOVA of difference in values at pre-study and study completion
7.4 ± 0.17
5.9 ± 0.16
5.6 ± 0.17
5.2 ± 0.17
8.9 ± 0.09
9.5 ± 0.10
9.7 ± 0.10
9.7 ± 0.10
There was a 30% decrease in serum phosphorus levels during the 12 week study period (p<0.01). Two-thirds of the decline occurred in the first month of the study. Serum calcium increased 9% during the study mostly in the first month of the study.
Treatment with the phosphate binder was discontinued for patients from the open-label study, and those patients whose serum phosphorus exceeded 5.5 mg/dL were eligible for entry into a double-blind, placebo-controlled, cross-over study. Patients were randomized to receive calcium acetate or placebo, and each continued to receive the same number of tablets as had been individually established during the previous study. Following 2 weeks of treatment, patients switched to the alternative therapy for an additional 2 weeks.
The phosphate binding effect of calcium acetate is shown in the Table 3.
16 HOW SUPPLIED/STORAGE AND HANDLING
Calcium Acetate Capsules, USP are blue opaque capsules imprinted with "HP 531" for oral administration containing 667 mg calcium acetate (anhydrous Ca(CH3COO)2; MW=158.17 grams) equal to 169 mg (8.45 mEq) calcium.
NDC 23155-531-02 Bottles of 200
NDC 23155-531-10 Bottles of 1000
STORAGE: Store at 25°C (77°F); excursions permitted to 15 to 30°C (59 to 86°F) [See USP Controlled Room Temperature].
17 PATIENT COUNSELING INFORMATION
Inform patients to take calcium acetate capsules with meals, adhere to their prescribed diets, and avoid the use of calcium supplements including nonprescription antacids. Inform the patients about the symptoms of hypercalcemia [see Warnings and Precautions (5.1) and Adverse Reactions (6.1) ].
Advise patients who are taking an oral medication where reduction in the bioavailability of that medication would have clinically significant effect on its safety and efficacy to take the drug one hour before or three hours after calcium acetate capsules.
East Brunswick, NJ 08816
PACKAGE LABEL.PRINCIPAL DISPLAY PANEL
667 mg calcium acetate, USP equivalent to 169 mg calcium
DIRECTIONS: SWALLOW CAPSULES. DO NOT CHEW.
Take as directed by your physician.
Store at 25oC (77oF); excursions permitted to 15 to 30oC (59 to 86oF)
[See USP Controlled Room Temperature]
Avet Pharmaceuticals Inc.
East Brunswick, NJ 08816
INGREDIENTS AND APPEARANCE
calcium acetate capsule
Product Information Product Type HUMAN PRESCRIPTION DRUG Item Code (Source) NDC:23155-531 Route of Administration ORAL Active Ingredient/Active Moiety Ingredient Name Basis of Strength Strength CALCIUM ACETATE (UNII: Y882YXF34X) (CALCIUM CATION - UNII:2M83C4R6ZB) CALCIUM ACETATE 667 mg Inactive Ingredients Ingredient Name Strength MAGNESIUM STEARATE (UNII: 70097M6I30) SODIUM LAURYL SULFATE (UNII: 368GB5141J) FD&C BLUE NO. 1 (UNII: H3R47K3TBD) TITANIUM DIOXIDE (UNII: 15FIX9V2JP) GELATIN (UNII: 2G86QN327L) BUTYL ALCOHOL (UNII: 8PJ61P6TS3) PROPYLENE GLYCOL (UNII: 6DC9Q167V3) SHELLAC (UNII: 46N107B71O) FERRIC ACETATE, BASIC (UNII: A5CF0H2UXG) CROSPOVIDONE (15 MPA.S AT 5%) (UNII: 68401960MK) Product Characteristics Color BLUE (Opaque) Score no score Shape CAPSULE Size 23mm Flavor Imprint Code HP531 Contains Packaging # Item Code Package Description Marketing Start Date Marketing End Date 1 NDC:23155-531-02 200 in 1 BOTTLE; Type 0: Not a Combination Product 07/07/2015 2 NDC:23155-531-10 1000 in 1 BOTTLE; Type 0: Not a Combination Product 07/07/2015 Marketing Information Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date ANDA ANDA202315 07/07/2015 Labeler - Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc. (780779901) Registrant - Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc. (780779901) Establishment Name Address ID/FEI Business Operations Macco Organiques Inc 246200364 API MANUFACTURE(23155-531) Establishment Name Address ID/FEI Business Operations Heritage Pharma Labs Inc. d/b/a Avet Pharmaceuticals Labs Inc. 189630168 ANALYSIS(23155-531) , LABEL(23155-531) , PACK(23155-531) , MANUFACTURE(23155-531) Establishment Name Address ID/FEI Business Operations Niacet b.v. 403364669 API MANUFACTURE(23155-531) Establishment Name Address ID/FEI Business Operations Nutra-Med Packaging Inc. 022004902 PACK(23155-531)