Medically reviewed by Drugs.com. Last updated on May 18, 2020.
(KAL see um LAK tate)
Excipient information presented when available (limited, particularly for generics); consult specific product labeling. [DSC] = Discontinued product
Capsule, Oral [preservative free]:
Cal-Lac: 500 mg [dye free]
Generic: 100 mg
Tablet, Oral [preservative free]:
Generic: 648 mg [DSC]
Brand Names: U.S.
- Cal-Lac [OTC]
- Calcium Salt
As dietary supplement, used to prevent or treat negative calcium balance; in osteoporosis, it helps to prevent or decrease the rate of bone loss. The calcium in calcium salts moderates nerve and muscle performance and allows normal cardiac function.
25% to 35%, requires vitamin D; varies with age (infants 60%, prepubertal children 28%, pubertal children 34%, young adults 25%); decreased absorption occurs in patients with achlorhydria, renal osteodystrophy, steatorrhea, or uremia
Primarily in the feces as unabsorbed calcium
Use: Labeled Indications
Dietary supplement: Use as a dietary supplement when calcium intake may be inadequate
OTC labeling: Dietary supplement: Oral: 252 mg (as elemental calcium) daily
Refer to adult dosing.
Note: Calcium lactate 1,000 mg = 130 mg elemental calcium = 6.5 mEq calcium
Hypocalcemia: Dose depends on clinical condition and serum calcium concentration: Dose expressed as elemental calcium: Limited data available: Infants and Children: Oral: 45 to 65 mg/kg/day in 4 divided doses (Nelson 1996)
May administer with or without food; administration with food may increase absorption.
Dietary reference intake for calcium (IOM 2011):
0 to <6 months: Adequate intake: 200 mg elemental calcium daily
6 to 12 months: Adequate intake: 260 mg elemental calcium daily
1 to 3 years: RDA: 700 mg elemental calcium daily
4 to 8 years: RDA: 1,000 mg elemental calcium daily
9 to 18 years: RDA: 1,300 mg elemental calcium daily
19 to 50 years: RDA: 1,000 mg elemental calcium daily
Females ≥51 years: RDA: 1,200 mg elemental calcium daily
Males: 51 to 70 years: RDA: 1,000 mg elemental calcium daily; >70 years: 1,200 mg elemental calcium daily
Pregnancy/Lactating: RDA: Requirements are the same as in nonpregnant or nonlactating females
Store at room temperature.
Alpha-Lipoic Acid: Calcium Salts may decrease the absorption of Alpha-Lipoic Acid. Alpha-Lipoic Acid may decrease the absorption of Calcium Salts. Management: Separate administration of alpha-lipoic acid from that of any calcium-containing compounds by several hours. If alpha-lipoic acid is given 30 minutes before breakfast, then administer oral calcium-containing products at lunch or dinner. Consider therapy modification
Baloxavir Marboxil: Polyvalent Cation Containing Products may decrease the serum concentration of Baloxavir Marboxil. Avoid combination
Bictegravir: Calcium Salts may decrease the serum concentration of Bictegravir. Management: Bictegravir, emtricitabine, and tenofovir alafenamide can be administered with calcium salts under fed conditions, but coadministration with or 2 hours after a calcium salt is not recommended under fasting conditions. Consider therapy modification
Bisphosphonate Derivatives: Polyvalent Cation Containing Products may decrease the serum concentration of Bisphosphonate Derivatives. Management: Avoid administration of oral medications containing polyvalent cations within: 2 hours before or after tiludronate/clodronate/etidronate; 60 minutes after oral ibandronate; or 30 minutes after alendronate/risedronate. Exceptions: Pamidronate; Zoledronic Acid. Consider therapy modification
Calcium Acetate: Calcium Salts may enhance the adverse/toxic effect of Calcium Acetate. Avoid combination
Calcium Channel Blockers: Calcium Salts may diminish the therapeutic effect of Calcium Channel Blockers. Monitor therapy
Cardiac Glycosides: Calcium Salts may enhance the arrhythmogenic effect of Cardiac Glycosides. Monitor therapy
Deferiprone: Polyvalent Cation Containing Products may decrease the serum concentration of Deferiprone. Management: Separate administration of deferiprone and oral medications or supplements that contain polyvalent cations by at least 4 hours. Consider therapy modification
DOBUTamine: Calcium Salts may diminish the therapeutic effect of DOBUTamine. Monitor therapy
Dolutegravir: Calcium Salts may decrease the serum concentration of Dolutegravir. Management: Administer dolutegravir at least 2 hours before or 6 hours after oral calcium. Administer dolutegravir/rilpivirine at least 4 hours before or 6 hours after oral calcium salts. Alternatively, dolutegravir and oral calcium can be taken together with food. Consider therapy modification
Eltrombopag: Polyvalent Cation Containing Products may decrease the serum concentration of Eltrombopag. Management: Administer eltrombopag at least 2 hours before or 4 hours after oral administration of any polyvalent cation containing product. Consider therapy modification
Elvitegravir: Polyvalent Cation Containing Products may decrease the serum concentration of Elvitegravir. Management: Administer elvitegravir 2 hours before or 6 hours after the administration of polyvalent cation containing products. Consider therapy modification
Estramustine: Calcium Salts may decrease the absorption of Estramustine. Management: Administer estramustine on an empty stomach, at least 1 hour before or 2 hours after the dose of an oral calcium supplement. If coadministered with calcium salts, monitor for decreased estramustine therapeutic effects. Consider therapy modification
Multivitamins/Fluoride (with ADE): May increase the serum concentration of Calcium Salts. Calcium Salts may decrease the serum concentration of Multivitamins/Fluoride (with ADE). More specifically, calcium salts may impair the absorption of fluoride. Management: Avoid eating or drinking dairy products or consuming vitamins or supplements with calcium salts one hour before or after of the administration of fluoride. Consider therapy modification
Multivitamins/Minerals (with ADEK, Folate, Iron): May increase the serum concentration of Calcium Salts. Monitor therapy
PenicillAMINE: Polyvalent Cation Containing Products may decrease the serum concentration of PenicillAMINE. Management: Separate the administration of penicillamine and oral polyvalent cation containing products by at least 1 hour. Consider therapy modification
Phosphate Supplements: Calcium Salts may decrease the absorption of Phosphate Supplements. Management: This applies only to oral phosphate and calcium administration. Administering oral phosphate supplements as far apart from the administration of an oral calcium salt as possible may be able to minimize the significance of the interaction. Exceptions: Sodium Glycerophosphate Pentahydrate. Consider therapy modification
Quinolones: Calcium Salts may decrease the absorption of Quinolones. Of concern only with oral administration of both agents. Management: Consider administering an oral quinolone at least 2 hours before or 6 hours after the dose of an oral calcium supplement to minimize this interaction. Monitor for decrease therapeutic effects of quinolones during coadministration. Exceptions: LevoFLOXacin (Oral Inhalation); Moxifloxacin (Systemic). Consider therapy modification
Raltegravir: Polyvalent Cation Containing Products may decrease the serum concentration of Raltegravir. Management: Administer raltegravir 2 hours before or 6 hours after administration of the polyvalent cations. Dose separation may not adequately minimize the significance of this interaction. Consider therapy modification
Strontium Ranelate: Calcium Salts may decrease the serum concentration of Strontium Ranelate. Management: Separate administration of strontium ranelate and oral calcium salts by at least 2 hours in order to minimize this interaction. Consider therapy modification
Tetracyclines: Calcium Salts may decrease the serum concentration of Tetracyclines. Management: If coadministration of oral calcium with oral tetracyclines cannot be avoided, consider separating administration of each agent by several hours. Exceptions: Eravacycline; Tigecycline. Consider therapy modification
Thiazide and Thiazide-Like Diuretics: May decrease the excretion of Calcium Salts. Continued concomitant use can also result in metabolic alkalosis. Monitor therapy
Thyroid Products: Calcium Salts may diminish the therapeutic effect of Thyroid Products. Management: Separate the doses of the thyroid product and the oral calcium supplement by at least 4 hours. Consider therapy modification
Trientine: Polyvalent Cation Containing Products may decrease the serum concentration of Trientine. Management: Avoid concomitant administration of trientine and oral products that contain polyvalent cations. If oral iron supplements are required, separate the administration by 2 hours. If other oral polyvalent cations are needed, separate administration by 1 hour. Consider therapy modification
Vitamin D Analogs: Calcium Salts may enhance the adverse/toxic effect of Vitamin D Analogs. Monitor therapy
<1%, postmarketing, and/or case reports: Confusion, constipation, dizziness, headache, hypercalcemia, hypercalciuria, hypomagnesemia, hypophosphatemia, milk-alkali syndrome, nausea, vomiting, xerostomia
Concerns related to adverse effects:
• Gastrointestinal effects: Constipation, bloating, and gas are common with calcium supplements (especially carbonate salt).
• Achlorhydria: Calcium absorption is impaired in achlorhydria; common in elderly, use an alternate salt (eg, citrate) and administer with food.
• Hypoparathyroid disease: Hypercalcemia and hypercalciuria are most likely to occur in hypoparathyroid patients receiving high doses of vitamin D.
• Kidney stones (calcium-containing): Use caution when administering calcium supplements to patients with a history of kidney stones.
• Renal impairment: Use with caution in patients with renal failure to avoid hypercalcemia; frequent monitoring of serum calcium and phosphorus is necessary.
Concurrent drug therapy issues:
• Minerals/other oral drugs: Calcium administration interferes with absorption of some minerals and drugs; use with caution.
• Vitamin D: It is recommended to concomitantly administer vitamin D for optimal calcium absorption.
• Absorption: Taking calcium (≤500 mg) with food improves absorption.
• Appropriate product selection: Multiple salt forms of calcium exist; close attention must be paid to the salt form when ordering and administering calcium; incorrect selection or substitution of one salt for another without proper dosage adjustment may result in serious over or under dosing.
Monitor plasma calcium levels if using calcium salts as electrolyte supplements for deficiency.
Calcium crosses the placenta. Intestinal absorption of calcium increases during pregnancy. The amount of calcium reaching the fetus is determined by maternal physiological changes. Calcium requirements are the same in pregnant and nonpregnant females (IOM, 2011).
What is this drug used for?
• It is used to treat or prevent low calcium levels.
• It may be given to you for other reasons. Talk with the doctor.
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
• Abdominal pain
• Passing gas
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
• Severe constipation
• Severe nausea
• Severe vomiting
• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.
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