Cal-Mag

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Cal-Mag uses

Cal-Mag consists of Calcium (Calcium Carbonate), Calcium (Calcium HVP Chelate), Magnesium (Magnesium HVP Chelate), Magnesium (Magnesium Oxide).

Calcium (Calcium Carbonate):


1 INDICATIONS AND USAGE

Cal-Mag (Calcium (Calcium Carbonate)) acetate is a phosphate binder indicated to reduce serum phosphorus in patients with end stage renal disease (ESRD).

- Calcium acetate is a phosphate binder indicated for the reduction of serum phosphorus in patients with end stage renal disease. (1)

2 DOSAGE AND ADMINISTRATION

The recommended initial dose of Cal-Mag (Calcium (Calcium Carbonate)) acetate for the adult dialysis patient is 2 capsules with each meal. Increase the dose gradually to lower serum phosphorus levels to the target range, as long as hypercalcemia does not develop. Most patients require 3 to 4 capsules with each meal.

- Starting dose is 2 capsules with each meal. (2)

- Titrate the dose every 2 to 3 weeks until acceptable serum phosphorus level is reached. Most patients require 3 to 4 capsules with each meal. (2)

3 DOSAGE FORMS AND STRENGTHS

Capsule: 667 mg Cal-Mag (Calcium (Calcium Carbonate)) acetate capsule.

- Capsule: 667 mg Cal-Mag (Calcium (Calcium Carbonate)) acetate capsule. (3)

4 CONTRAINDICATIONS

Patients with hypercalcemia.

- Hypercalcemia. (4)

5 WARNINGS AND PRECAUTIONS

- Treat mild hypercalcemia by reducing or interrupting Cal-Mag ) acetate and Vitamin D. Severe hypercalcemia may require hemodialysis and discontinuation of Cal-Mag (Calcium (Calcium Carbonate)) acetate. (5.1)

- Hypercalcemia may aggravate digitalis toxicity. (5.2)

5.1 Hypercalcemia

Patients with end stage renal disease may develop hypercalcemia when treated with Cal-Mag (Calcium (Calcium Carbonate)), including Cal-Mag (Calcium (Calcium Carbonate)) acetate. Avoid the use of Cal-Mag (Calcium (Calcium Carbonate)) supplements, including Cal-Mag (Calcium (Calcium Carbonate)) based nonprescription antacids, concurrently with Cal-Mag (Calcium (Calcium Carbonate)) acetate.

An overdose of Cal-Mag (Calcium (Calcium Carbonate)) acetate may lead to progressive hypercalcemia, which may require emergency measures. Therefore, early in the treatment phase during the dosage adjustment period, monitor serum Cal-Mag (Calcium (Calcium Carbonate)) levels twice weekly. Should hypercalcemia develop, reduce the Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) 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 solid dose formulation of Cal-Mag (Calcium (Calcium Carbonate)) acetate; all cases resolved upon lowering the dose or discontinuing treatment.

Maintain the serum calcium-phosphorus (Ca x P) product below 55 mg2/dL2.

5.2 Concomitant Use with Medications

Hypercalcemia may aggravate digitalis toxicity.

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6 ADVERSE REACTIONS

Hypercalcemia is discussed elsewhere [see 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 Cal-Mag (Calcium (Calcium Carbonate)) acetate therapy. (6)

To report SUSPECTED ADVERSE REACTIONS, contact West-Ward Pharmaceuticals Corp. at 1-800-962-8364 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch

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, Cal-Mag (Calcium (Calcium Carbonate)) acetate has been generally well tolerated.

Cal-Mag (Calcium (Calcium Carbonate)) acetate was studied in a 3 month, open-label, non-randomized study of 98 enrolled ESRD hemodialysis patients and an alternate liquid formulation of Cal-Mag (Calcium (Calcium Carbonate)) acetate was studied 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.


Preferred Term


Total adverse reactions reported for Cal-Mag (Calcium (Calcium Carbonate)) acetate

N=167

N (%)


3 month, open label study of Cal-Mag (Calcium (Calcium Carbonate)) acetate

N=98

N (%)


Double blind, placebo-controlled, cross-over study of liquid Cal-Mag (Calcium (Calcium Carbonate)) acetate

N=69


Cal-Mag (Calcium (Calcium Carbonate)) acetate

N (%)


Placebo

N (%)


Nausea


6 (3.6)


6 (6.1)


0 (0)


0 (0)


Vomiting


4 (2.4)


4 (4.1)


0 (0)


0 (0)


Hypercalcemia


21 (12.6)


16 (16.3)


5 (7.2)


0 (0)


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 Cal-Mag (Calcium (Calcium Carbonate)) concentration could reduce the incidence and severity of Cal-Mag (Calcium (Calcium Carbonate)) acetate-induced hypercalcemia. Isolated cases pruritus have been reported, which may represent allergic reactions.

6.2 Postmarketing Experience

Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or to establish a causal relationship to drug exposure.

The following additional adverse reactions have been identified during post-approval of Cal-Mag (Calcium (Calcium Carbonate)) acetate: dizziness, edema, and weakness.

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7 DRUG INTERACTIONS

The drug interaction of Cal-Mag ) acetate is characterized by the potential of Cal-Mag (Calcium (Calcium Carbonate)) to bind to drugs with anionic functions (e.g., carboxyl, and hydroxyl groups). Cal-Mag (Calcium (Calcium Carbonate)) acetate may decrease the bioavailability of tetracyclines or fluoroquinolones via this mechanism.

There are no empirical data on avoiding drug interactions between Cal-Mag (Calcium (Calcium Carbonate)) acetate and most concomitant drugs. When administering an oral medication with Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) acetate.

- Calcium acetate 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 Cal-Mag (Calcium (Calcium Carbonate)) acetate or consider monitoring blood levels of the drug. (7)

7.1 Ciprofloxacin

In a study of 15 healthy subjects, a co-administered single dose of 4 Cal-Mag (Calcium (Calcium Carbonate)) acetate tablets, approximately 2.7g, decreased the bioavailability of ciprofloxacin by approximately 50%.

8 USE IN SPECIFIC POPULATIONS

8.1 Pregnancy

Pregnancy Category C:

Cal-Mag ) acetate capsules contains Cal-Mag (Calcium (Calcium Carbonate)) acetate. Animal reproduction studies have not been conducted with Cal-Mag (Calcium (Calcium Carbonate)) acetate, and there are no adequate and well controlled studies of Cal-Mag (Calcium (Calcium Carbonate)) acetate use in pregnant women. Patients with end stage renal disease may develop hypercalcemia with Cal-Mag (Calcium (Calcium Carbonate)) acetate treatment [see Warnings and Precautions (5.1 ) ]. Maintenance of normal serum Cal-Mag (Calcium (Calcium Carbonate)) 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. Cal-Mag (Calcium (Calcium Carbonate)) acetate treatment, as recommended, is not expected to harm a fetus if maternal Cal-Mag (Calcium (Calcium Carbonate)) levels are properly monitored during and following treatment.

8.2 Labor and Delivery

The effects of Cal-Mag (Calcium (Calcium Carbonate)) acetate on labor and delivery are unknown.

8.3 Nursing Mothers

Cal-Mag ) Acetate Capsules contains Cal-Mag (Calcium (Calcium Carbonate)) acetate and is excreted in human milk. Human milk feeding by a mother receiving Cal-Mag (Calcium (Calcium Carbonate)) acetate is not expected to harm an infant, provided maternal serum Cal-Mag (Calcium (Calcium Carbonate)) levels are appropriately monitored.

8.4 Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

8.5 Geriatric Use

Clinical studies of Cal-Mag (Calcium (Calcium Carbonate)) 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 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.

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10 OVERDOSAGE

Administration of Cal-Mag (Calcium (Calcium Carbonate)) acetate in excess of the appropriate daily dosage may result in hypercalcemia [see Warnings and Precautions (5.1)].

11 DESCRIPTION

Cal-Mag (Calcium (Calcium Carbonate)) acetate acts as a phosphate binder. Its chemical name is Cal-Mag (Calcium (Calcium Carbonate)) acetate. Its molecular formula is C4H6CaO4, and its molecular weight is 158.17. Its structural formula is:


Each white opaque/blue opaque capsule contains 667 mg of Cal-Mag (Calcium (Calcium Carbonate)) acetate USP (anhydrous; Ca(CH3COO)2; MW=158.17 grams) equal to 169 mg (8.45 mEq) Cal-Mag (Calcium (Calcium Carbonate)), polyethylene glycol 8000 and magnesium stearate. Each capsule shell contains: black monogramming ink, FD&C Blue #1, FD&C Red #3, gelatin and titanium dioxide. The black monogramming ink contains: ammonium hydroxide, iron oxide black, isopropyl alcohol, n-butyl alcohol, propylene glycol and shellac glaze.

Cal-Mag (Calcium (Calcium Carbonate)) Acetate Capsules are administered orally for the control of hyperphosphatemia in end-stage renal failure.

Chemical Structure

12 CLINICAL PHARMACOLOGY

Patients with ESRD retain phosphorus and can develop hyperphosphatemia. High serum phosphorus can precipitate serum Cal-Mag ) resulting in ectopic calcification. Hyperphosphatemia also plays a role in the development of secondary hyperparathyroidism in patients with ESRD.

12.1 Mechanism of Action

Cal-Mag (Calcium (Calcium Carbonate)) acetate, when taken with meals, combines with dietary phosphate to form an insoluble Cal-Mag (Calcium (Calcium Carbonate)) phosphate complex, which is excreted in the feces, resulting in decreased serum phosphorus concentration.

12.2 Pharmacodynamics

Orally administered Cal-Mag (Calcium (Calcium Carbonate)) acetate from pharmaceutical dosage forms is systemically absorbed up to approximately 40% under fasting conditions and up to approximately 30% under nonfasting conditions. This range represents data from both healthy subjects and renal dialysis patients under various conditions.

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13 NONCLINICAL TOXICOLOGY

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

No carcinogenicity, mutagenicity, or fertility studies have been conducted with Cal-Mag (Calcium (Calcium Carbonate)) acetate.

14 CLINICAL STUDIES

Effectiveness of Cal-Mag (Calcium (Calcium Carbonate)) acetate in decreasing serum phosphorus has been demonstrated in two studies of the Cal-Mag (Calcium (Calcium Carbonate)) acetate solid oral dosage form.

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 Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) acetate in the treatment of hyperphosphatemia in end-stage renal disease patients. The effects on serum Cal-Mag (Calcium (Calcium Carbonate)) levels are also presented.


* Ninety-one patients completed at least 6 weeks of the study.

ANOVA of difference in values at pre-study and study completion.

‡ Values expressed as mean ± SE.


Parameter


Pre-Study


Week 4*


Week 8


Week 12


p-value†


Phosphorus (mg/dL)‡


7.4 ± 0.17


5.9 ± 0.16


5.6 ± 0.17


5.2 ± 0.17


≤0.01


Cal-Mag (Calcium (Calcium Carbonate)) (mg/dL)‡


8.9 ± 0.09


9.5 ± 0.10


9.7 ± 0.10


9.7 ± 0.10


≤0.01


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 Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) 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 Cal-Mag (Calcium (Calcium Carbonate)) acetate is shown in the Table 3.


* ANOVA of Cal-Mag (Calcium (Calcium Carbonate)) acetate vs. placebo after 2 weeks of treatment.

Values expressed as mean ± SEM.


Parameter


Pre-Study


Post-Treatment


p-value*


Cal-Mag (Calcium (Calcium Carbonate)) Acetate


Placebo


Phosphorus (mg/dL)


7.3 ± 0.18


5.9 ± 0.24


7.8 ± 0.22


<0.01


Cal-Mag (Calcium (Calcium Carbonate)) (mg/dL)


8.9 ± 0.11


9.5 ± 0.13


8.8 ± 0.12


<0.01


Overall, 2 weeks of treatment with Cal-Mag (Calcium (Calcium Carbonate)) acetate statistically significantly (p<0.01) decreased serum phosphorus by a mean of 19% and increased serum Cal-Mag (Calcium (Calcium Carbonate)) by a statistically significant (p<0.01) but clinically unimportant mean of 7%.

16 HOW SUPPLIED/STORAGE AND HANDLING

Cal-Mag (Calcium (Calcium Carbonate)) Acetate Capsules

667 mg capsule is supplied as a white opaque/blue opaque capsule, imprinted with “54 215” on the cap and body.

NDC 0615-2303-39: Blistercards of 30 Capsules

NDC 0615-2303-30: Unit-dose Boxes of 30 Capsules

STORAGE

Store at 20° to 25°C (68° to 77°F).

17 PATIENT COUNSELING INFORMATION

Inform patients to take Cal-Mag (Calcium (Calcium Carbonate)) acetate capsules with meals, adhere to their prescribed diets, and avoid the use of Cal-Mag (Calcium (Calcium Carbonate)) 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 or efficacy to take the drug one hour before or three hours after Cal-Mag (Calcium (Calcium Carbonate)) acetate capsules.

Distr. by: West-Ward

Pharmaceuticals Corp.

Eatontown, NJ 07724

10003705/05

Revised April 2016

Calcium (Calcium HVP Chelate):


1 INDICATIONS AND USAGE

Cal-Mag (Calcium (Calcium HVP Chelate)) acetate is a phosphate binder indicated to reduce serum phosphorus in patients with end stage renal disease (ESRD).

- Calcium acetate is a phosphate binder indicated for the reduction of serum phosphorus in patients with end stage renal disease. (1)

2 DOSAGE AND ADMINISTRATION

The recommended initial dose of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate for the adult dialysis patient is 2 capsules with each meal. Increase the dose gradually to lower serum phosphorus levels to the target range, as long as hypercalcemia does not develop. Most patients require 3 to 4 capsules with each meal.

- Starting dose is 2 capsules with each meal. (2)

- Titrate the dose every 2 to 3 weeks until acceptable serum phosphorus level is reached. Most patients require 3 to 4 capsules with each meal. (2)

3 DOSAGE FORMS AND STRENGTHS

Capsule: 667 mg Cal-Mag (Calcium (Calcium HVP Chelate)) acetate capsule.

- Capsule: 667 mg Cal-Mag (Calcium (Calcium HVP Chelate)) acetate capsule. (3)

4 CONTRAINDICATIONS

Patients with hypercalcemia.

- Hypercalcemia. (4)

5 WARNINGS AND PRECAUTIONS

- Treat mild hypercalcemia by reducing or interrupting Cal-Mag ) acetate and Vitamin D. Severe hypercalcemia may require hemodialysis and discontinuation of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate. (5.1)

- Hypercalcemia may aggravate digitalis toxicity. (5.2)

5.1 Hypercalcemia

Patients with end stage renal disease may develop hypercalcemia when treated with Cal-Mag (Calcium (Calcium HVP Chelate)), including Cal-Mag (Calcium (Calcium HVP Chelate)) acetate. Avoid the use of Cal-Mag (Calcium (Calcium HVP Chelate)) supplements, including Cal-Mag (Calcium (Calcium HVP Chelate)) based nonprescription antacids, concurrently with Cal-Mag (Calcium (Calcium HVP Chelate)) acetate.

An overdose of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate may lead to progressive hypercalcemia, which may require emergency measures. Therefore, early in the treatment phase during the dosage adjustment period, monitor serum Cal-Mag (Calcium (Calcium HVP Chelate)) levels twice weekly. Should hypercalcemia develop, reduce the Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 solid dose formulation of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate; all cases resolved upon lowering the dose or discontinuing treatment.

Maintain the serum calcium-phosphorus (Ca x P) product below 55 mg2/dL2.

5.2 Concomitant Use with Medications

Hypercalcemia may aggravate digitalis toxicity.

6 ADVERSE REACTIONS

Hypercalcemia is discussed elsewhere [see 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 Cal-Mag (Calcium (Calcium HVP Chelate)) acetate therapy. (6)

To report SUSPECTED ADVERSE REACTIONS, contact West-Ward Pharmaceuticals Corp. at 1-800-962-8364 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch

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, Cal-Mag (Calcium (Calcium HVP Chelate)) acetate has been generally well tolerated.

Cal-Mag (Calcium (Calcium HVP Chelate)) acetate was studied in a 3 month, open-label, non-randomized study of 98 enrolled ESRD hemodialysis patients and an alternate liquid formulation of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate was studied 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.


Preferred Term


Total adverse reactions reported for Cal-Mag (Calcium (Calcium HVP Chelate)) acetate

N=167

N (%)


3 month, open label study of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate

N=98

N (%)


Double blind, placebo-controlled, cross-over study of liquid Cal-Mag (Calcium (Calcium HVP Chelate)) acetate

N=69


Cal-Mag (Calcium (Calcium HVP Chelate)) acetate

N (%)


Placebo

N (%)


Nausea


6 (3.6)


6 (6.1)


0 (0)


0 (0)


Vomiting


4 (2.4)


4 (4.1)


0 (0)


0 (0)


Hypercalcemia


21 (12.6)


16 (16.3)


5 (7.2)


0 (0)


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 Cal-Mag (Calcium (Calcium HVP Chelate)) concentration could reduce the incidence and severity of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate-induced hypercalcemia. Isolated cases pruritus have been reported, which may represent allergic reactions.

6.2 Postmarketing Experience

Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or to establish a causal relationship to drug exposure.

The following additional adverse reactions have been identified during post-approval of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate: dizziness, edema, and weakness.

7 DRUG INTERACTIONS

The drug interaction of Cal-Mag ) acetate is characterized by the potential of Cal-Mag (Calcium (Calcium HVP Chelate)) to bind to drugs with anionic functions (e.g., carboxyl, and hydroxyl groups). Cal-Mag (Calcium (Calcium HVP Chelate)) acetate may decrease the bioavailability of tetracyclines or fluoroquinolones via this mechanism.

There are no empirical data on avoiding drug interactions between Cal-Mag (Calcium (Calcium HVP Chelate)) acetate and most concomitant drugs. When administering an oral medication with Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) acetate.

- Calcium acetate 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 Cal-Mag (Calcium (Calcium HVP Chelate)) acetate or consider monitoring blood levels of the drug. (7)

7.1 Ciprofloxacin

In a study of 15 healthy subjects, a co-administered single dose of 4 Cal-Mag (Calcium (Calcium HVP Chelate)) acetate tablets, approximately 2.7g, decreased the bioavailability of ciprofloxacin by approximately 50%.

8 USE IN SPECIFIC POPULATIONS

8.1 Pregnancy

Pregnancy Category C:

Cal-Mag ) acetate capsules contains Cal-Mag (Calcium (Calcium HVP Chelate)) acetate. Animal reproduction studies have not been conducted with Cal-Mag (Calcium (Calcium HVP Chelate)) acetate, and there are no adequate and well controlled studies of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate use in pregnant women. Patients with end stage renal disease may develop hypercalcemia with Cal-Mag (Calcium (Calcium HVP Chelate)) acetate treatment [see Warnings and Precautions (5.1 ) ]. Maintenance of normal serum Cal-Mag (Calcium (Calcium HVP Chelate)) 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. Cal-Mag (Calcium (Calcium HVP Chelate)) acetate treatment, as recommended, is not expected to harm a fetus if maternal Cal-Mag (Calcium (Calcium HVP Chelate)) levels are properly monitored during and following treatment.

8.2 Labor and Delivery

The effects of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate on labor and delivery are unknown.

8.3 Nursing Mothers

Cal-Mag ) Acetate Capsules contains Cal-Mag (Calcium (Calcium HVP Chelate)) acetate and is excreted in human milk. Human milk feeding by a mother receiving Cal-Mag (Calcium (Calcium HVP Chelate)) acetate is not expected to harm an infant, provided maternal serum Cal-Mag (Calcium (Calcium HVP Chelate)) levels are appropriately monitored.

8.4 Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

8.5 Geriatric Use

Clinical studies of Cal-Mag (Calcium (Calcium HVP Chelate)) 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 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.

10 OVERDOSAGE

Administration of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate in excess of the appropriate daily dosage may result in hypercalcemia [see Warnings and Precautions (5.1)].

11 DESCRIPTION

Cal-Mag (Calcium (Calcium HVP Chelate)) acetate acts as a phosphate binder. Its chemical name is Cal-Mag (Calcium (Calcium HVP Chelate)) acetate. Its molecular formula is C4H6CaO4, and its molecular weight is 158.17. Its structural formula is:


Each white opaque/blue opaque capsule contains 667 mg of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate USP (anhydrous; Ca(CH3COO)2; MW=158.17 grams) equal to 169 mg (8.45 mEq) Cal-Mag (Calcium (Calcium HVP Chelate)), polyethylene glycol 8000 and magnesium stearate. Each capsule shell contains: black monogramming ink, FD&C Blue #1, FD&C Red #3, gelatin and titanium dioxide. The black monogramming ink contains: ammonium hydroxide, iron oxide black, isopropyl alcohol, n-butyl alcohol, propylene glycol and shellac glaze.

Cal-Mag (Calcium (Calcium HVP Chelate)) Acetate Capsules are administered orally for the control of hyperphosphatemia in end-stage renal failure.

Chemical Structure

12 CLINICAL PHARMACOLOGY

Patients with ESRD retain phosphorus and can develop hyperphosphatemia. High serum phosphorus can precipitate serum Cal-Mag ) resulting in ectopic calcification. Hyperphosphatemia also plays a role in the development of secondary hyperparathyroidism in patients with ESRD.

12.1 Mechanism of Action

Cal-Mag (Calcium (Calcium HVP Chelate)) acetate, when taken with meals, combines with dietary phosphate to form an insoluble Cal-Mag (Calcium (Calcium HVP Chelate)) phosphate complex, which is excreted in the feces, resulting in decreased serum phosphorus concentration.

12.2 Pharmacodynamics

Orally administered Cal-Mag (Calcium (Calcium HVP Chelate)) acetate from pharmaceutical dosage forms is systemically absorbed up to approximately 40% under fasting conditions and up to approximately 30% under nonfasting conditions. This range represents data from both healthy subjects and renal dialysis patients under various conditions.

13 NONCLINICAL TOXICOLOGY

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

No carcinogenicity, mutagenicity, or fertility studies have been conducted with Cal-Mag (Calcium (Calcium HVP Chelate)) acetate.

14 CLINICAL STUDIES

Effectiveness of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate in decreasing serum phosphorus has been demonstrated in two studies of the Cal-Mag (Calcium (Calcium HVP Chelate)) acetate solid oral dosage form.

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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) acetate in the treatment of hyperphosphatemia in end-stage renal disease patients. The effects on serum Cal-Mag (Calcium (Calcium HVP Chelate)) levels are also presented.


* Ninety-one patients completed at least 6 weeks of the study.

ANOVA of difference in values at pre-study and study completion.

‡ Values expressed as mean ± SE.


Parameter


Pre-Study


Week 4*


Week 8


Week 12


p-value†


Phosphorus (mg/dL)‡


7.4 ± 0.17


5.9 ± 0.16


5.6 ± 0.17


5.2 ± 0.17


≤0.01


Cal-Mag (Calcium (Calcium HVP Chelate)) (mg/dL)‡


8.9 ± 0.09


9.5 ± 0.10


9.7 ± 0.10


9.7 ± 0.10


≤0.01


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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) 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 Cal-Mag (Calcium (Calcium HVP Chelate)) acetate is shown in the Table 3.


* ANOVA of Cal-Mag (Calcium (Calcium HVP Chelate)) acetate vs. placebo after 2 weeks of treatment.

Values expressed as mean ± SEM.


Parameter


Pre-Study


Post-Treatment


p-value*


Cal-Mag (Calcium (Calcium HVP Chelate)) Acetate


Placebo


Phosphorus (mg/dL)


7.3 ± 0.18


5.9 ± 0.24


7.8 ± 0.22


<0.01


Cal-Mag (Calcium (Calcium HVP Chelate)) (mg/dL)


8.9 ± 0.11


9.5 ± 0.13


8.8 ± 0.12


<0.01


Overall, 2 weeks of treatment with Cal-Mag (Calcium (Calcium HVP Chelate)) acetate statistically significantly (p<0.01) decreased serum phosphorus by a mean of 19% and increased serum Cal-Mag (Calcium (Calcium HVP Chelate)) by a statistically significant (p<0.01) but clinically unimportant mean of 7%.

16 HOW SUPPLIED/STORAGE AND HANDLING

Cal-Mag (Calcium (Calcium HVP Chelate)) Acetate Capsules

667 mg capsule is supplied as a white opaque/blue opaque capsule, imprinted with “54 215” on the cap and body.

NDC 0615-2303-39: Blistercards of 30 Capsules

NDC 0615-2303-30: Unit-dose Boxes of 30 Capsules

STORAGE

Store at 20° to 25°C (68° to 77°F).

17 PATIENT COUNSELING INFORMATION

Inform patients to take Cal-Mag (Calcium (Calcium HVP Chelate)) acetate capsules with meals, adhere to their prescribed diets, and avoid the use of Cal-Mag (Calcium (Calcium HVP Chelate)) 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 or efficacy to take the drug one hour before or three hours after Cal-Mag (Calcium (Calcium HVP Chelate)) acetate capsules.

Distr. by: West-Ward

Pharmaceuticals Corp.

Eatontown, NJ 07724

10003705/05

Revised April 2016

Magnesium (Magnesium HVP Chelate):



Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate

Injection, USP

Ansyr Plastic Syringe

Rx only

Hospira Logo

DESCRIPTION

Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate Injection, USP is a sterile solution of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate heptahydrate in Water for Injection, USP administered by the intravenous or intramuscular routes as an electrolyte replenisher or anticonvulsant. Must be diluted before intravenous use. May contain sulfuric acid and/or sodium hydroxide for pH adjustment. The pH is 5.5 to 7.0. The 50% concentration has an osmolarity of 4.06 mOsmol/mL (calc.).

The solution contains no bacteriostat, antimicrobial agent or added buffer (except for pH adjustment) and is intended only for use as a single-dose injection. When smaller doses are required the unused portion should be discarded with the entire unit.

Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate, USP heptahydrate is chemically designated MgSO4 - 7H2O with molecular weight of 246.48 and occurs as colorless crystals or white powder freely soluble in water.

The plastic syringe is molded from a specially formulated polypropylene. Water permeates from inside the container at an extremely slow rate which will have an insignificant effect on solution concentration over the expected shelf life. Solutions in contact with the plastic container may leach out certain chemical components from the plastic in very small amounts; however, biological testing was supportive of the safety of the syringe material.

CLINICAL PHARMACOLOGY

Cal-Mag (Magnesium (Magnesium HVP Chelate)) (Mg++) is an important cofactor for enzymatic reactions and plays an important role in neurochemical transmission and muscular excitability.

As a nutritional adjunct in hyperalimentation, the precise mechanism of action for Cal-Mag (Magnesium (Magnesium HVP Chelate)) is uncertain. Early symptoms of hypomagnesemia (less than 1.5 mEq/liter) may develop as early as three to four days or within weeks.

Predominant deficiency effects are neurological, e.g., muscle irritability, clonic twitching and tremors. Hypocalcemia and hypokalemia often follow low serum levels of Cal-Mag (Magnesium (Magnesium HVP Chelate)). While there are large stores of Cal-Mag (Magnesium (Magnesium HVP Chelate)) present intracellularly and in the bones of adults, these stores often are not mobilized sufficiently to maintain plasma levels. Parenteral Cal-Mag (Magnesium (Magnesium HVP Chelate)) therapy repairs the plasma deficit and causes deficiency symptoms and signs to cease.

Cal-Mag (Magnesium (Magnesium HVP Chelate)) prevents or controls convulsions by blocking neuromuscular transmission and decreasing the amount of acetylcholine liberated at the end plate by the motor nerve impulse. Cal-Mag (Magnesium (Magnesium HVP Chelate)) is said to have a depressant effect on the central nervous system (CNS), but it does not adversely affect the woman, fetus or neonate when used as directed in eclampsia or pre-eclampsia. Normal plasma Cal-Mag (Magnesium (Magnesium HVP Chelate)) levels range from 1.5 to 2.5 mEq/liter.

As plasma Cal-Mag (Magnesium (Magnesium HVP Chelate)) rises above 4 mEq/liter, the deep tendon reflexes are first decreased and then disappear as the plasma level approaches 10 mEq/liter. At this level respiratory paralysis may occur. Heart block also may occur at this or lower plasma levels of Cal-Mag (Magnesium (Magnesium HVP Chelate)). Serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) concentrations in excess of 12 mEq/L may be fatal.

Cal-Mag (Magnesium (Magnesium HVP Chelate)) acts peripherally to produce vasodilation. With low doses only flushing and sweating occur, but larger doses cause lowering of blood pressure. The central and peripheral effects of Cal-Mag (Magnesium (Magnesium HVP Chelate)) poisoning are antagonized to some extent by intravenous administration of calcium.

Pharmacokinetics

With intravenous administration the onset of anticonvulsant action is immediate and lasts about 30 minutes. Following intramuscular administration the onset of action occurs in about one hour and persists for three to four hours. Effective anticonvulsant serum levels range from 2.5 to 7.5 mEq/liter. Cal-Mag (Magnesium (Magnesium HVP Chelate)) is excreted solely by the kidneys at a rate proportional to the plasma concentration and glomerular filtration.

INDICATIONS AND USAGE

Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate Injection, USP is suitable for replacement therapy in Cal-Mag (Magnesium (Magnesium HVP Chelate)) deficiency, especially in acute hypomagnesemia accompanied by signs of tetany similar to those observed in hypocalcemia. In such cases, the serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) (Mg++) level is usually below the lower limit of normal (1.5 to 2.5 mEq/liter) and the serum calcium (Ca++) level is normal (4.3 to 5.3 mEq/liter) or elevated.

In total parenteral nutrition (TPN), Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate may be added to the nutrient admixture to correct or prevent hypomagnesemia which can arise during the course of therapy.

Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate Injection, USP is also indicated for the prevention and control of seizures (convulsions) in pre-eclampsia and eclampsia, respectively.

CONTRAINDICATIONS

Parenteral administration of the drug is contraindicated in patients with heart block or myocardial damage.

WARNINGS

FETAL HARM: Continuous administration of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate beyond 5 to 7 days to pregnant women can lead to hypocalcemia and bone abnormalities in the developing fetus. These bone abnormalities include skeletal demineralization and osteopenia. In addition, cases of neonatal fracture have been reported. The shortest duration of treatment that can lead to fetal harm is not known. Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate should be used during pregnancy only if clearly needed. If Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate is given for treatment of preterm labor, the woman should be informed that the efficacy and safety of such use have not been established and that use of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate beyond 5 to 7 days may cause fetal abnormalities.

ALUMINUM TOXICITY: This product contains aluminum that may be toxic. Aluminum may reach toxic levels with prolonged parenteral administration if kidney function is impaired. Premature neonates are particularly at risk because their kidneys are immature, and they require large amounts of calcium and phosphate solutions, which contain aluminum.

Research indicates that patients with impaired kidney function, including premature neonates, who receive parenteral levels of aluminum at greater than 4 to 5 mcg/kg/day accumulate aluminum at levels associated with central nervous system and bone toxicity. Tissue loading may occur at even lower rates of administration.

Parenteral use in the presence of renal insufficiency may lead to Cal-Mag (Magnesium (Magnesium HVP Chelate)) intoxication. Intravenous use in the eclampsia should be reserved for immediate control of life-threatening convulsions.

PRECAUTIONS

General

Administer with caution if flushing and sweating occurs. When barbiturates, narcotics or other hypnotics (or systemic anesthetics) are to be given in conjunction with Cal-Mag (Magnesium (Magnesium HVP Chelate)), their dosage should be adjusted with caution because of additive CNS depressant effects of Cal-Mag (Magnesium (Magnesium HVP Chelate)).

Because Cal-Mag (Magnesium (Magnesium HVP Chelate)) is removed from the body solely by the kidneys, the drug should be used with caution in patients with renal impairment. Urine output should be maintained at a level of 100 mL or more during the four hours preceding each dose. Monitoring serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) levels and the patient's clinical status is essential to avoid the consequences of overdosage in toxemia. Clinical indications of a safe dosage regimen include the presence of the patellar reflex (knee jerk) and absence of respiratory depression (approximately 16 breaths or more/minute). When repeated doses of the drug are given parenterally, knee jerk reflexes should be tested before each dose and if they are absent, no additional Cal-Mag (Magnesium (Magnesium HVP Chelate)) should be given until they return. Serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) levels usually sufficient to control convulsions range from 3 to 6 mg/100 mL (2.5 to 5 mEq/liter). The strength of the deep tendon reflexes begins to diminish when Cal-Mag (Magnesium (Magnesium HVP Chelate)) levels exceed 4 mEq/liter. Reflexes may be absent at 10 mEq magnesium/liter, where respiratory paralysis is a potential hazard. An injectable calcium salt should be immediately available to counteract the potential hazards of Cal-Mag (Magnesium (Magnesium HVP Chelate)) intoxication in eclampsia.

50% Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate Injection, USP must be diluted to a concentration of 20% or less prior to intravenous infusion. Rate of administration should be slow and cautious, to avoid producing hypermagnesemia. The 50% solution also should be diluted to 20% or less for intramuscular injection in infants and children.

Laboratory Tests

Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate injection should not be given unless hypomagnesemia has been confirmed and the serum concentration of Cal-Mag (Magnesium (Magnesium HVP Chelate)) is monitored. The normal serum level is 1.5 to 2.5 mEq/L.

Drug Interactions

CNS Depressants - When barbiturates, narcotics or other hypnotics (or systemic anesthetics), or other CNS depressants are to be given in conjunction with Cal-Mag (Magnesium (Magnesium HVP Chelate)), their dosage should be adjusted with caution because of additive CNS depressant effects of Cal-Mag (Magnesium (Magnesium HVP Chelate)). CNS depression and peripheral transmission defects produced by Cal-Mag (Magnesium (Magnesium HVP Chelate)) may be antagonized by calcium.

Neuromuscular Blocking Agents - Excessive neuromuscular block has occurred in patients receiving parenteral Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate and a neuromuscular blocking agent; these drugs should be administered concomitantly with caution.

Cardiac Glycosides - Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate should be administered with extreme caution in digitalized patients, because serious changes in cardiac conduction which can result in heart block may occur if administration of calcium is required to treat Cal-Mag (Magnesium (Magnesium HVP Chelate)) toxicity.

Pregnancy

Teratogenic Effects

Pregnancy Category D (See WARNINGS and PRECAUTIONS )

See WARNINGS and PRECAUTIONS .

Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate can cause fetal abnormalities when administered beyond 5 to 7 days to pregnant women. There are retrospective epidemiological studies and case reports documenting fetal abnormalities such as hypocalcemia, skeletal demineralization, osteopenia and other skeletal abnormalities with continuous maternal administration of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate for more than 5 to 7 days.1-10 Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate injection should be used during pregnancy only if clearly needed. If this drug is used during pregnancy, the woman should be apprised of the potential harm to the fetus.

Nonteratogenic Effects

When administered by continuous intravenous infusion (especially for more than 24 hours preceding delivery) to control convulsions in a toxemic woman, the newborn may show signs of Cal-Mag (Magnesium (Magnesium HVP Chelate)) toxicity, including neuromuscular or respiratory depression (See OVERDOSAGE ).

Labor and Delivery

Continuous administration of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate is an unapproved treatment for preterm labor. The safety and efficacy of such use have not been established. The administration of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate outside of its approved indication in pregnant women should be by trained obstetrical personnel in a hospital setting with appropriate obstetrical care facilities.

Nursing Mothers

Since Cal-Mag (Magnesium (Magnesium HVP Chelate)) is distributed into milk during parenteral Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate administration, the drug should be used with caution in nursing women.

Geriatrics

Geriatric patients often require reduced dosage because of impaired renal function. In patients with severe impairment, dosage should not exceed 20 grams in 48 hours. Serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) should be monitored in such patients.

ADVERSE REACTIONS

The adverse effects of parenterally administered Cal-Mag (Magnesium (Magnesium HVP Chelate)) usually are the result of Cal-Mag (Magnesium (Magnesium HVP Chelate)) intoxication. These include flushing, sweating, hypotension, depressed reflexes, flaccid paralysis, hypothermia, circulatory collapse, cardiac and central nervous system depression proceeding to respiratory paralysis. Hypocalcemia with signs of tetany secondary to Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate therapy for eclampsia has been reported.

OVERDOSAGE

Cal-Mag (Magnesium (Magnesium HVP Chelate)) intoxication is manifested by a sharp drop in blood pressure and respiratory paralysis. Disappearance of the patellar reflex is a useful clinical sign to detect the onset of Cal-Mag (Magnesium (Magnesium HVP Chelate)) intoxication. In the event of overdosage, artificial ventilation must be provided until a calcium salt can be injected intravenously to antagonize the effects of Cal-Mag (Magnesium (Magnesium HVP Chelate)).

For Treatment of Overdose

Artificial respiration is often required. Intravenous calcium, 10 to 20 mL of a 5% solution (diluted if desirable with isotonic sodium chloride for injection) is used to counteract effects of hypermagnesemia. Subcutaneous physostigmine, 0.5 to 1 mg may be helpful.

Hypermagnesemia in the newborn may require resuscitation and assisted ventilation via endotracheal intubation or intermittent positive pressure ventilation as well as intravenous calcium.

DOSAGE AND ADMINISTRATION

Dosage of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate must be carefully adjusted according to individual requirements and response, and administration of the drug should be discontinued as soon as the desired effect is obtained.

Both intravenous and intramuscular administration are appropriate. Intramuscular administration of the undiluted 50% solution results in therapeutic plasma levels in 60 minutes, whereas intravenous doses will provide a therapeutic level almost immediately. The rate of intravenous injection should generally not exceed 150 mg/minute (1.5 mL of a 10% concentration or its equivalent), except in severe eclampsia with seizures. Continuous maternal administration of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate in pregnancy beyond 5 to 7 days can cause fetal abnormalities.

Solutions for intravenous infusion must be diluted to a concentration of 20% or less prior to administration. The diluents commonly used are 5% Dextrose Injection, USP and 0.9% Sodium Chloride Injection, USP. Deep intramuscular injection of the undiluted (50%) solution is appropriate for adults, but the solution should be diluted to a 20% or less concentration prior to such injection in children.

In Cal-Mag (Magnesium (Magnesium HVP Chelate)) Deficiency

In the treatment of mild Cal-Mag (Magnesium (Magnesium HVP Chelate)) deficiency, the usual adult dose is 1 gram, equivalent to 8.12 mEq of Cal-Mag (Magnesium (Magnesium HVP Chelate)) (2 mL of the 50% solution) injected intramuscularly every six hours for four doses (equivalent to a total of 32.5 mEq of Cal-Mag (Magnesium (Magnesium HVP Chelate)) per 24 hours). For severe hypomagnesemia, as much as 250 mg (approximately 2 mEq) per kg of body weight (0.5 mL of the 50% solution) may be given intramuscularly within a period of four hours if necessary. Alternatively, 5 grams, (approximately 40 mEq) can be added to one liter of 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP for slow intravenous infusion over a three-hour period. In the treatment of deficiency states, caution must be observed to prevent exceeding the renal excretory capacity.

In Hyperalimentation

In total parenteral nutrition, maintenance requirements for Cal-Mag (Magnesium (Magnesium HVP Chelate)) are not precisely known. The maintenance dose used in adults ranges from 8 to 24 mEq (1 gram to 3 grams) daily; for infants, the range is 2 to 10 mEq (0.25 gram to 1.25 grams) daily.

In Pre-eclampsia or Eclampsia

In severe pre-eclampsia or eclampsia, the total initial dose is 10 grams to 14 grams of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate. Intravenously, a dose of 4 grams to 5 grams in 250 mL of 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP may be infused. Simultaneously, intramuscular doses of up to 10 grams (5 grams or 10 mL of the undiluted 50% solution in each buttock) are given. Alternatively, the initial intravenous dose of 4 grams may be given by diluting the 50% solution to a 10 or 20% concentration; the diluted fluid (40 mL of a 10% solution or 20 mL of a 20% solution) may then be injected intravenously over a period of three to four minutes. Subsequently, 4 grams to 5 grams (8 to 10 mL of the 50% solution) are injected intramuscularly into alternate buttocks every four hours as needed, depending on the continuing presence of the patellar reflex and adequate respiratory function. Alternatively, after the initial intravenous dose, some clinicians administer 1 gram to 2 grams/hour by constant intravenous infusion. Therapy should continue until paroxysms cease. A serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) level of 6 mg/100 mL is considered optimal for control of seizures. A total daily (24 hr) dose of 30 grams to 40 grams should not be exceeded. In the presence of severe renal insufficiency, the maximum dosage of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate is 20 grams/48 hours and frequent serum Cal-Mag (Magnesium (Magnesium HVP Chelate)) concentrations must be obtained. Continuous use of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate in pregnancy beyond 5 to 7 days can cause fetal abnormalities.

Other Uses

In counteracting the muscle-stimulating effects of barium poisoning, the usual dose of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate is 1 gram to 2 grams given intravenously.

For controlling seizures associated with epilepsy, glomerulonephritis or hypothyroidism, the usual adult dose is 1 gram administered intramuscularly or intravenously.

In paroxysmal atrial tachycardia, Cal-Mag (Magnesium (Magnesium HVP Chelate)) should be used only if simpler measures have failed and there is no evidence of myocardial damage. The usual dose is 3 grams to 4 grams (30 to 40 mL of a 10% solution) administered intravenously over 30 seconds with extreme caution.

For reduction of cerebral edema, 2.5 grams (25 mL of a 10% solution) is given intravenously.

Incompatibilities

Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate in solution may result in a precipitate formation when mixed with solutions containing:

Alcohol (in high Heavy Metals

concentrations) Hydrocortisone sodium

Alkali carbonates and succinate

bicarbonates Phosphates

Alkali hydroxides Polymixin B sulfate

Arsenates Procaine hydrochloride

Barium Salicylates

Calcium Strontium

Clindamycin phosphate Tartrates

The potential incompatibility will often be influenced by the changes in the concentration of reactants and the pH of the solutions.

It has been reported that Cal-Mag (Magnesium (Magnesium HVP Chelate)) may reduce the antibiotic activity of streptomycin, tetracycline and tobramycin when given together.

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

HOW SUPPLIED

Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate Injection, USP is supplied in single-dose containers as follows:


NDC No.


Container


Total

Amount


Concentration


mEq

Mg++/mL


0409-1754-10


Ansyr

Plastic Syringe


5 g/10 mL


50%


4 mEq/mL


Do not administer unless solution is clear and container is undamaged. Discard unused portion.

Store at 20 to 25°C (68 to 77°F).

REFERENCES

  • Yokoyama K, Takahashi N, Yada Y. Prolonged maternal Cal-Mag (Magnesium (Magnesium HVP Chelate)) administration and bone metabolism in neonates. Early Hum Dev. 2010;86(3):187-91. Epub 2010 Mar 12.
  • Wedig KE, Kogan J, Schorry EK et al. Skeletal demineralization and fractures caused by fetal Cal-Mag (Magnesium (Magnesium HVP Chelate)) toxicity. J. Perinatol. 2006; 26(6):371-4.
  • Nassar AH, Sakhel K, Maarouf H, et al. Adverse maternal and neonatal outcome of prolonged course of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate tocolysis. Acta Obstet Gynecol Scan. 2006;85(9):1099-103.
  • Malaeb SN, Rassi A, Haddad MC. Bone mineralization in newborns whose mothers received Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulphate for tocolysis of premature labor. Pediatr Radiol. 2004;34(5):384-6. Epub 2004 Feb 18.
  • Matsuda Y, Maeda Y, Ito M, et al. Effect of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate treatment on neonatal bone abnormalities. Gynecol Obstet Invest. 1997;44(2):82-8.
  • Schanler RJ, Smith LG, Burns PA. Effects of long-term maternal intravenous Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate therapy on neonatal calcium metabolism and bone mineral content. Gynecol Obstet Invest. 1997;43(4):236-41.
  • Santi MD, Henry GW, Douglas GL. Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate treatment of preterm labor as a cause of abnormal neonatal bone mineralization. J Pediatr Orthrop. 1994;14(2):249-53.
  • Holcomb WL, Shackelford GD, Petrie RH. Cal-Mag (Magnesium (Magnesium HVP Chelate)) tocolysis and neonatal bone abnormalities; a controlled study. Obstet Gynecol. 1991; 78(4):611-4.
  • Cumming WA, Thomas VJ. Hypermagnesemia: a cause of abnormal metaphyses in the neonate. Am J Roentgenol. 1989; 152(5):1071-2.
  • Lamm CL, Norton KL, Murphy RJ. Congenital rickets associated with Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate infusion for tocolysis. J Pediatr. 1988; 113(6):1078-82.
  • McGuinness GA, Weinstein MM, Cruikshank DP, et al. Effects of Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate treatment on perinatal calcium metabolism. II. Neonatal responses. Obstet Gynecol. 1980; 56(5): 595-600.
  • Riaz M, Porat R, Brodsky NL, et al. The effects of maternal Cal-Mag (Magnesium (Magnesium HVP Chelate)) sulfate treatment on newborns: a prospective controlled study. J. Perinatol. 1998;18(6 pt 1):449-54.

Hospira, Inc., Lake Forest, IL 60045 USA

LAB-1024-1.0

April 2017

Hospira Logo

50% Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate 5 g/10 mL (500 mg/mL)

Rx only

NDC 0409-1754-10

10 mL Single-dose syringe

50% Cal-Mag (Magnesium (Magnesium HVP Chelate)) Sulfate Injection, USP

5 g/10 mL (500 mg/mL) (4 mEq Mg++/mL)

MUST BE DILUTED FOR INTRAVENOUS USE.

For Intravenous or Intramuscular Use. Sterile. 4.06 mOsmol/mL (calc.).

Contains no more than 75 mcg/L of aluminum.

Hospira, Inc., Lake Forest, IL 60045 USA

Hospira

RL-6891

Magnesium (Magnesium Oxide):



Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate

Injection, USP

Ansyr Plastic Syringe

Rx only

Hospira Logo

DESCRIPTION

Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate Injection, USP is a sterile solution of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate heptahydrate in Water for Injection, USP administered by the intravenous or intramuscular routes as an electrolyte replenisher or anticonvulsant. Must be diluted before intravenous use. May contain sulfuric acid and/or sodium hydroxide for pH adjustment. The pH is 5.5 to 7.0. The 50% concentration has an osmolarity of 4.06 mOsmol/mL (calc.).

The solution contains no bacteriostat, antimicrobial agent or added buffer (except for pH adjustment) and is intended only for use as a single-dose injection. When smaller doses are required the unused portion should be discarded with the entire unit.

Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate, USP heptahydrate is chemically designated MgSO4 - 7H2O with molecular weight of 246.48 and occurs as colorless crystals or white powder freely soluble in water.

The plastic syringe is molded from a specially formulated polypropylene. Water permeates from inside the container at an extremely slow rate which will have an insignificant effect on solution concentration over the expected shelf life. Solutions in contact with the plastic container may leach out certain chemical components from the plastic in very small amounts; however, biological testing was supportive of the safety of the syringe material.

CLINICAL PHARMACOLOGY

Cal-Mag (Magnesium (Magnesium Oxide)) (Mg++) is an important cofactor for enzymatic reactions and plays an important role in neurochemical transmission and muscular excitability.

As a nutritional adjunct in hyperalimentation, the precise mechanism of action for Cal-Mag (Magnesium (Magnesium Oxide)) is uncertain. Early symptoms of hypomagnesemia (less than 1.5 mEq/liter) may develop as early as three to four days or within weeks.

Predominant deficiency effects are neurological, e.g., muscle irritability, clonic twitching and tremors. Hypocalcemia and hypokalemia often follow low serum levels of Cal-Mag (Magnesium (Magnesium Oxide)). While there are large stores of Cal-Mag (Magnesium (Magnesium Oxide)) present intracellularly and in the bones of adults, these stores often are not mobilized sufficiently to maintain plasma levels. Parenteral Cal-Mag (Magnesium (Magnesium Oxide)) therapy repairs the plasma deficit and causes deficiency symptoms and signs to cease.

Cal-Mag (Magnesium (Magnesium Oxide)) prevents or controls convulsions by blocking neuromuscular transmission and decreasing the amount of acetylcholine liberated at the end plate by the motor nerve impulse. Cal-Mag (Magnesium (Magnesium Oxide)) is said to have a depressant effect on the central nervous system (CNS), but it does not adversely affect the woman, fetus or neonate when used as directed in eclampsia or pre-eclampsia. Normal plasma Cal-Mag (Magnesium (Magnesium Oxide)) levels range from 1.5 to 2.5 mEq/liter.

As plasma Cal-Mag (Magnesium (Magnesium Oxide)) rises above 4 mEq/liter, the deep tendon reflexes are first decreased and then disappear as the plasma level approaches 10 mEq/liter. At this level respiratory paralysis may occur. Heart block also may occur at this or lower plasma levels of Cal-Mag (Magnesium (Magnesium Oxide)). Serum Cal-Mag (Magnesium (Magnesium Oxide)) concentrations in excess of 12 mEq/L may be fatal.

Cal-Mag (Magnesium (Magnesium Oxide)) acts peripherally to produce vasodilation. With low doses only flushing and sweating occur, but larger doses cause lowering of blood pressure. The central and peripheral effects of Cal-Mag (Magnesium (Magnesium Oxide)) poisoning are antagonized to some extent by intravenous administration of calcium.

Pharmacokinetics

With intravenous administration the onset of anticonvulsant action is immediate and lasts about 30 minutes. Following intramuscular administration the onset of action occurs in about one hour and persists for three to four hours. Effective anticonvulsant serum levels range from 2.5 to 7.5 mEq/liter. Cal-Mag (Magnesium (Magnesium Oxide)) is excreted solely by the kidneys at a rate proportional to the plasma concentration and glomerular filtration.

INDICATIONS AND USAGE

Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate Injection, USP is suitable for replacement therapy in Cal-Mag (Magnesium (Magnesium Oxide)) deficiency, especially in acute hypomagnesemia accompanied by signs of tetany similar to those observed in hypocalcemia. In such cases, the serum Cal-Mag (Magnesium (Magnesium Oxide)) (Mg++) level is usually below the lower limit of normal (1.5 to 2.5 mEq/liter) and the serum calcium (Ca++) level is normal (4.3 to 5.3 mEq/liter) or elevated.

In total parenteral nutrition (TPN), Cal-Mag (Magnesium (Magnesium Oxide)) sulfate may be added to the nutrient admixture to correct or prevent hypomagnesemia which can arise during the course of therapy.

Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate Injection, USP is also indicated for the prevention and control of seizures (convulsions) in pre-eclampsia and eclampsia, respectively.

CONTRAINDICATIONS

Parenteral administration of the drug is contraindicated in patients with heart block or myocardial damage.

WARNINGS

FETAL HARM: Continuous administration of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate beyond 5 to 7 days to pregnant women can lead to hypocalcemia and bone abnormalities in the developing fetus. These bone abnormalities include skeletal demineralization and osteopenia. In addition, cases of neonatal fracture have been reported. The shortest duration of treatment that can lead to fetal harm is not known. Cal-Mag (Magnesium (Magnesium Oxide)) sulfate should be used during pregnancy only if clearly needed. If Cal-Mag (Magnesium (Magnesium Oxide)) sulfate is given for treatment of preterm labor, the woman should be informed that the efficacy and safety of such use have not been established and that use of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate beyond 5 to 7 days may cause fetal abnormalities.

ALUMINUM TOXICITY: This product contains aluminum that may be toxic. Aluminum may reach toxic levels with prolonged parenteral administration if kidney function is impaired. Premature neonates are particularly at risk because their kidneys are immature, and they require large amounts of calcium and phosphate solutions, which contain aluminum.

Research indicates that patients with impaired kidney function, including premature neonates, who receive parenteral levels of aluminum at greater than 4 to 5 mcg/kg/day accumulate aluminum at levels associated with central nervous system and bone toxicity. Tissue loading may occur at even lower rates of administration.

Parenteral use in the presence of renal insufficiency may lead to Cal-Mag (Magnesium (Magnesium Oxide)) intoxication. Intravenous use in the eclampsia should be reserved for immediate control of life-threatening convulsions.

PRECAUTIONS

General

Administer with caution if flushing and sweating occurs. When barbiturates, narcotics or other hypnotics (or systemic anesthetics) are to be given in conjunction with Cal-Mag (Magnesium (Magnesium Oxide)), their dosage should be adjusted with caution because of additive CNS depressant effects of Cal-Mag (Magnesium (Magnesium Oxide)).

Because Cal-Mag (Magnesium (Magnesium Oxide)) is removed from the body solely by the kidneys, the drug should be used with caution in patients with renal impairment. Urine output should be maintained at a level of 100 mL or more during the four hours preceding each dose. Monitoring serum Cal-Mag (Magnesium (Magnesium Oxide)) levels and the patient's clinical status is essential to avoid the consequences of overdosage in toxemia. Clinical indications of a safe dosage regimen include the presence of the patellar reflex (knee jerk) and absence of respiratory depression (approximately 16 breaths or more/minute). When repeated doses of the drug are given parenterally, knee jerk reflexes should be tested before each dose and if they are absent, no additional Cal-Mag (Magnesium (Magnesium Oxide)) should be given until they return. Serum Cal-Mag (Magnesium (Magnesium Oxide)) levels usually sufficient to control convulsions range from 3 to 6 mg/100 mL (2.5 to 5 mEq/liter). The strength of the deep tendon reflexes begins to diminish when Cal-Mag (Magnesium (Magnesium Oxide)) levels exceed 4 mEq/liter. Reflexes may be absent at 10 mEq magnesium/liter, where respiratory paralysis is a potential hazard. An injectable calcium salt should be immediately available to counteract the potential hazards of Cal-Mag (Magnesium (Magnesium Oxide)) intoxication in eclampsia.

50% Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate Injection, USP must be diluted to a concentration of 20% or less prior to intravenous infusion. Rate of administration should be slow and cautious, to avoid producing hypermagnesemia. The 50% solution also should be diluted to 20% or less for intramuscular injection in infants and children.

Laboratory Tests

Cal-Mag (Magnesium (Magnesium Oxide)) sulfate injection should not be given unless hypomagnesemia has been confirmed and the serum concentration of Cal-Mag (Magnesium (Magnesium Oxide)) is monitored. The normal serum level is 1.5 to 2.5 mEq/L.

Drug Interactions

CNS Depressants - When barbiturates, narcotics or other hypnotics (or systemic anesthetics), or other CNS depressants are to be given in conjunction with Cal-Mag (Magnesium (Magnesium Oxide)), their dosage should be adjusted with caution because of additive CNS depressant effects of Cal-Mag (Magnesium (Magnesium Oxide)). CNS depression and peripheral transmission defects produced by Cal-Mag (Magnesium (Magnesium Oxide)) may be antagonized by calcium.

Neuromuscular Blocking Agents - Excessive neuromuscular block has occurred in patients receiving parenteral Cal-Mag (Magnesium (Magnesium Oxide)) sulfate and a neuromuscular blocking agent; these drugs should be administered concomitantly with caution.

Cardiac Glycosides - Cal-Mag (Magnesium (Magnesium Oxide)) sulfate should be administered with extreme caution in digitalized patients, because serious changes in cardiac conduction which can result in heart block may occur if administration of calcium is required to treat Cal-Mag (Magnesium (Magnesium Oxide)) toxicity.

Pregnancy

Teratogenic Effects

Pregnancy Category D (See WARNINGS and PRECAUTIONS )

See WARNINGS and PRECAUTIONS .

Cal-Mag (Magnesium (Magnesium Oxide)) sulfate can cause fetal abnormalities when administered beyond 5 to 7 days to pregnant women. There are retrospective epidemiological studies and case reports documenting fetal abnormalities such as hypocalcemia, skeletal demineralization, osteopenia and other skeletal abnormalities with continuous maternal administration of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate for more than 5 to 7 days.1-10 Cal-Mag (Magnesium (Magnesium Oxide)) sulfate injection should be used during pregnancy only if clearly needed. If this drug is used during pregnancy, the woman should be apprised of the potential harm to the fetus.

Nonteratogenic Effects

When administered by continuous intravenous infusion (especially for more than 24 hours preceding delivery) to control convulsions in a toxemic woman, the newborn may show signs of Cal-Mag (Magnesium (Magnesium Oxide)) toxicity, including neuromuscular or respiratory depression (See OVERDOSAGE ).

Labor and Delivery

Continuous administration of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate is an unapproved treatment for preterm labor. The safety and efficacy of such use have not been established. The administration of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate outside of its approved indication in pregnant women should be by trained obstetrical personnel in a hospital setting with appropriate obstetrical care facilities.

Nursing Mothers

Since Cal-Mag (Magnesium (Magnesium Oxide)) is distributed into milk during parenteral Cal-Mag (Magnesium (Magnesium Oxide)) sulfate administration, the drug should be used with caution in nursing women.

Geriatrics

Geriatric patients often require reduced dosage because of impaired renal function. In patients with severe impairment, dosage should not exceed 20 grams in 48 hours. Serum Cal-Mag (Magnesium (Magnesium Oxide)) should be monitored in such patients.

ADVERSE REACTIONS

The adverse effects of parenterally administered Cal-Mag (Magnesium (Magnesium Oxide)) usually are the result of Cal-Mag (Magnesium (Magnesium Oxide)) intoxication. These include flushing, sweating, hypotension, depressed reflexes, flaccid paralysis, hypothermia, circulatory collapse, cardiac and central nervous system depression proceeding to respiratory paralysis. Hypocalcemia with signs of tetany secondary to Cal-Mag (Magnesium (Magnesium Oxide)) sulfate therapy for eclampsia has been reported.

OVERDOSAGE

Cal-Mag (Magnesium (Magnesium Oxide)) intoxication is manifested by a sharp drop in blood pressure and respiratory paralysis. Disappearance of the patellar reflex is a useful clinical sign to detect the onset of Cal-Mag (Magnesium (Magnesium Oxide)) intoxication. In the event of overdosage, artificial ventilation must be provided until a calcium salt can be injected intravenously to antagonize the effects of Cal-Mag (Magnesium (Magnesium Oxide)).

For Treatment of Overdose

Artificial respiration is often required. Intravenous calcium, 10 to 20 mL of a 5% solution (diluted if desirable with isotonic sodium chloride for injection) is used to counteract effects of hypermagnesemia. Subcutaneous physostigmine, 0.5 to 1 mg may be helpful.

Hypermagnesemia in the newborn may require resuscitation and assisted ventilation via endotracheal intubation or intermittent positive pressure ventilation as well as intravenous calcium.

DOSAGE AND ADMINISTRATION

Dosage of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate must be carefully adjusted according to individual requirements and response, and administration of the drug should be discontinued as soon as the desired effect is obtained.

Both intravenous and intramuscular administration are appropriate. Intramuscular administration of the undiluted 50% solution results in therapeutic plasma levels in 60 minutes, whereas intravenous doses will provide a therapeutic level almost immediately. The rate of intravenous injection should generally not exceed 150 mg/minute (1.5 mL of a 10% concentration or its equivalent), except in severe eclampsia with seizures. Continuous maternal administration of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate in pregnancy beyond 5 to 7 days can cause fetal abnormalities.

Solutions for intravenous infusion must be diluted to a concentration of 20% or less prior to administration. The diluents commonly used are 5% Dextrose Injection, USP and 0.9% Sodium Chloride Injection, USP. Deep intramuscular injection of the undiluted (50%) solution is appropriate for adults, but the solution should be diluted to a 20% or less concentration prior to such injection in children.

In Cal-Mag (Magnesium (Magnesium Oxide)) Deficiency

In the treatment of mild Cal-Mag (Magnesium (Magnesium Oxide)) deficiency, the usual adult dose is 1 gram, equivalent to 8.12 mEq of Cal-Mag (Magnesium (Magnesium Oxide)) (2 mL of the 50% solution) injected intramuscularly every six hours for four doses (equivalent to a total of 32.5 mEq of Cal-Mag (Magnesium (Magnesium Oxide)) per 24 hours). For severe hypomagnesemia, as much as 250 mg (approximately 2 mEq) per kg of body weight (0.5 mL of the 50% solution) may be given intramuscularly within a period of four hours if necessary. Alternatively, 5 grams, (approximately 40 mEq) can be added to one liter of 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP for slow intravenous infusion over a three-hour period. In the treatment of deficiency states, caution must be observed to prevent exceeding the renal excretory capacity.

In Hyperalimentation

In total parenteral nutrition, maintenance requirements for Cal-Mag (Magnesium (Magnesium Oxide)) are not precisely known. The maintenance dose used in adults ranges from 8 to 24 mEq (1 gram to 3 grams) daily; for infants, the range is 2 to 10 mEq (0.25 gram to 1.25 grams) daily.

In Pre-eclampsia or Eclampsia

In severe pre-eclampsia or eclampsia, the total initial dose is 10 grams to 14 grams of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate. Intravenously, a dose of 4 grams to 5 grams in 250 mL of 5% Dextrose Injection, USP or 0.9% Sodium Chloride Injection, USP may be infused. Simultaneously, intramuscular doses of up to 10 grams (5 grams or 10 mL of the undiluted 50% solution in each buttock) are given. Alternatively, the initial intravenous dose of 4 grams may be given by diluting the 50% solution to a 10 or 20% concentration; the diluted fluid (40 mL of a 10% solution or 20 mL of a 20% solution) may then be injected intravenously over a period of three to four minutes. Subsequently, 4 grams to 5 grams (8 to 10 mL of the 50% solution) are injected intramuscularly into alternate buttocks every four hours as needed, depending on the continuing presence of the patellar reflex and adequate respiratory function. Alternatively, after the initial intravenous dose, some clinicians administer 1 gram to 2 grams/hour by constant intravenous infusion. Therapy should continue until paroxysms cease. A serum Cal-Mag (Magnesium (Magnesium Oxide)) level of 6 mg/100 mL is considered optimal for control of seizures. A total daily (24 hr) dose of 30 grams to 40 grams should not be exceeded. In the presence of severe renal insufficiency, the maximum dosage of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate is 20 grams/48 hours and frequent serum Cal-Mag (Magnesium (Magnesium Oxide)) concentrations must be obtained. Continuous use of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate in pregnancy beyond 5 to 7 days can cause fetal abnormalities.

Other Uses

In counteracting the muscle-stimulating effects of barium poisoning, the usual dose of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate is 1 gram to 2 grams given intravenously.

For controlling seizures associated with epilepsy, glomerulonephritis or hypothyroidism, the usual adult dose is 1 gram administered intramuscularly or intravenously.

In paroxysmal atrial tachycardia, Cal-Mag (Magnesium (Magnesium Oxide)) should be used only if simpler measures have failed and there is no evidence of myocardial damage. The usual dose is 3 grams to 4 grams (30 to 40 mL of a 10% solution) administered intravenously over 30 seconds with extreme caution.

For reduction of cerebral edema, 2.5 grams (25 mL of a 10% solution) is given intravenously.

Incompatibilities

Cal-Mag (Magnesium (Magnesium Oxide)) sulfate in solution may result in a precipitate formation when mixed with solutions containing:

Alcohol (in high Heavy Metals

concentrations) Hydrocortisone sodium

Alkali carbonates and succinate

bicarbonates Phosphates

Alkali hydroxides Polymixin B sulfate

Arsenates Procaine hydrochloride

Barium Salicylates

Calcium Strontium

Clindamycin phosphate Tartrates

The potential incompatibility will often be influenced by the changes in the concentration of reactants and the pH of the solutions.

It has been reported that Cal-Mag (Magnesium (Magnesium Oxide)) may reduce the antibiotic activity of streptomycin, tetracycline and tobramycin when given together.

Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit.

HOW SUPPLIED

Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate Injection, USP is supplied in single-dose containers as follows:


NDC No.


Container


Total

Amount


Concentration


mEq

Mg++/mL


0409-1754-10


Ansyr

Plastic Syringe


5 g/10 mL


50%


4 mEq/mL


Do not administer unless solution is clear and container is undamaged. Discard unused portion.

Store at 20 to 25°C (68 to 77°F).

REFERENCES

  • Yokoyama K, Takahashi N, Yada Y. Prolonged maternal Cal-Mag (Magnesium (Magnesium Oxide)) administration and bone metabolism in neonates. Early Hum Dev. 2010;86(3):187-91. Epub 2010 Mar 12.
  • Wedig KE, Kogan J, Schorry EK et al. Skeletal demineralization and fractures caused by fetal Cal-Mag (Magnesium (Magnesium Oxide)) toxicity. J. Perinatol. 2006; 26(6):371-4.
  • Nassar AH, Sakhel K, Maarouf H, et al. Adverse maternal and neonatal outcome of prolonged course of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate tocolysis. Acta Obstet Gynecol Scan. 2006;85(9):1099-103.
  • Malaeb SN, Rassi A, Haddad MC. Bone mineralization in newborns whose mothers received Cal-Mag (Magnesium (Magnesium Oxide)) sulphate for tocolysis of premature labor. Pediatr Radiol. 2004;34(5):384-6. Epub 2004 Feb 18.
  • Matsuda Y, Maeda Y, Ito M, et al. Effect of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate treatment on neonatal bone abnormalities. Gynecol Obstet Invest. 1997;44(2):82-8.
  • Schanler RJ, Smith LG, Burns PA. Effects of long-term maternal intravenous Cal-Mag (Magnesium (Magnesium Oxide)) sulfate therapy on neonatal calcium metabolism and bone mineral content. Gynecol Obstet Invest. 1997;43(4):236-41.
  • Santi MD, Henry GW, Douglas GL. Cal-Mag (Magnesium (Magnesium Oxide)) sulfate treatment of preterm labor as a cause of abnormal neonatal bone mineralization. J Pediatr Orthrop. 1994;14(2):249-53.
  • Holcomb WL, Shackelford GD, Petrie RH. Cal-Mag (Magnesium (Magnesium Oxide)) tocolysis and neonatal bone abnormalities; a controlled study. Obstet Gynecol. 1991; 78(4):611-4.
  • Cumming WA, Thomas VJ. Hypermagnesemia: a cause of abnormal metaphyses in the neonate. Am J Roentgenol. 1989; 152(5):1071-2.
  • Lamm CL, Norton KL, Murphy RJ. Congenital rickets associated with Cal-Mag (Magnesium (Magnesium Oxide)) sulfate infusion for tocolysis. J Pediatr. 1988; 113(6):1078-82.
  • McGuinness GA, Weinstein MM, Cruikshank DP, et al. Effects of Cal-Mag (Magnesium (Magnesium Oxide)) sulfate treatment on perinatal calcium metabolism. II. Neonatal responses. Obstet Gynecol. 1980; 56(5): 595-600.
  • Riaz M, Porat R, Brodsky NL, et al. The effects of maternal Cal-Mag (Magnesium (Magnesium Oxide)) sulfate treatment on newborns: a prospective controlled study. J. Perinatol. 1998;18(6 pt 1):449-54.

Hospira, Inc., Lake Forest, IL 60045 USA

LAB-1024-1.0

April 2017

Hospira Logo

50% Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate 5 g/10 mL (500 mg/mL)

Rx only

NDC 0409-1754-10

10 mL Single-dose syringe

50% Cal-Mag (Magnesium (Magnesium Oxide)) Sulfate Injection, USP

5 g/10 mL (500 mg/mL) (4 mEq Mg++/mL)

MUST BE DILUTED FOR INTRAVENOUS USE.

For Intravenous or Intramuscular Use. Sterile. 4.06 mOsmol/mL (calc.).

Contains no more than 75 mcg/L of aluminum.

Hospira, Inc., Lake Forest, IL 60045 USA

Hospira

RL-6891

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References

  1. Dailymed."CALCIUM: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailym... (accessed August 28, 2018).
  2. "Calcium". https://pubchem.ncbi.nlm.nih.gov/co... (accessed August 28, 2018).
  3. "Calcium". http://www.drugbank.ca/drugs/DB0137... (accessed August 28, 2018).

Frequently asked Questions

Can i drive or operate heavy machine after consuming Cal-Mag?

Depending on the reaction of the Cal-Mag after taken, if you are feeling dizziness, drowsiness or any weakness as a reaction on your body, Then consider Cal-Mag not safe to drive or operate heavy machine after consumption. Meaning that, do not drive or operate heavy duty machines after taking the capsule if the capsule has a strange reaction on your body like dizziness, drowsiness. As prescribed by a pharmacist, it is dangerous to take alcohol while taking medicines as it exposed patients to drowsiness and health risk. Please take note of such effect most especially when taking Primosa capsule. It's advisable to consult your doctor on time for a proper recommendation and medical consultations.

Is Cal-Mag addictive or habit forming?

Medicines are not designed with the mind of creating an addiction or abuse on the health of the users. Addictive Medicine is categorically called Controlled substances by the government. For instance, Schedule H or X in India and schedule II-V in the US are controlled substances.

Please consult the medicine instruction manual on how to use and ensure it is not a controlled substance.In conclusion, self medication is a killer to your health. Consult your doctor for a proper prescription, recommendation, and guidiance.

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sdrugs.com conducted a study on Cal-Mag, and the result of the survey is set out below. It is noteworthy that the product of the survey is based on the perception and impressions of the visitors of the website as well as the views of Cal-Mag consumers. We, as a result of this, advice that you do not base your therapeutic or medical decisions on this result, but rather consult your certified medical experts for their recommendations.

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Few medications can be taken Once in a day more than prescribed when the doctor's advice mentions the medicine can be taken according to frequency or severity of symptoms. Most times, be very careful and clear about the number of times you are taking the medication. The report of sdrugs.com website users about the frequency of taking the drug Cal-Mag is mentioned below.
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100.0%

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Click here to find out how other users of our website are taking it. For any doubts or queries on how and when the medicine is administered, contact your health care provider immediately.
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With a meal1
100.0%

Three visitors reported age

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> 602
66.7%
46-601
33.3%

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