Version May 2024
Dietary supplement (OTC labeling): Oral: 252 mg (as elemental calcium) daily.
Refer to adult dosing.
(For additional information see "Calcium lactate: Pediatric drug information")
Note: Calcium lactate 1,000 mg = 130 mg elemental calcium = 6.5 mEq calcium
Hypocalcemia, asymptomatic: Limited data available: Children and Adolescents: Dose expressed as elemental calcium: Oral: 30 to 75 mg/kg/day in 4 to 5 divided doses (Ref).
Initiate at the lowest dose of the recommended dosage range; monitor serum calcium concentrations closely. Accumulation may occur with renal impairment and subsequent doses may require adjustment based on serum calcium concentrations.
There are no dosage adjustments provided in the manufacturer's labeling. No initial dosage adjustment necessary, subsequent doses should be guided by serum calcium concentrations.
The following adverse drug reactions and incidences are derived from product labeling unless otherwise specified.
<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).
Disease-related concerns:
• 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.
Other warnings/precautions:
• 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.
648 mg calcium lactate = elemental calcium 84 mg = calcium 4.2 mEq = calcium 2.1 mmol
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Tablet, Oral:
Generic: 100 mg
Yes
Tablets (Calcium Lactate Oral)
648 mg (per each): $0.11
Disclaimer: A representative AWP (Average Wholesale Price) price or price range is provided as reference price only. A range is provided when more than one manufacturer's AWP price is available and uses the low and high price reported by the manufacturers to determine the range. The pricing data should be used for benchmarking purposes only, and as such should not be used alone to set or adjudicate any prices for reimbursement or purchasing functions or considered to be an exact price for a single product and/or manufacturer. Medi-Span expressly disclaims all warranties of any kind or nature, whether express or implied, and assumes no liability with respect to accuracy of price or price range data published in its solutions. In no event shall Medi-Span be liable for special, indirect, incidental, or consequential damages arising from use of price or price range data. Pricing data is updated monthly.
May administer with or without food; administration with food may increase absorption.
Oral: Administer with plenty of fluids with or following meals.
Dietary supplement: Use as a dietary supplement when calcium intake may be inadequate
None known.
Note: Interacting drugs may not be individually listed below if they are part of a group interaction (eg, individual drugs within “CYP3A4 Inducers [Strong]” are NOT listed). For a complete list of drug interactions by individual drug name and detailed management recommendations, use the Lexicomp drug interactions program by clicking on the “Launch drug interactions program” link above.
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. Risk D: Consider therapy modification
Baloxavir Marboxil: Polyvalent Cation Containing Products may decrease the serum concentration of Baloxavir Marboxil. Risk X: 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. Risk D: 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. Risk D: Consider therapy modification
Cabotegravir: Polyvalent Cation Containing Products may decrease the serum concentration of Cabotegravir. Management: Administer polyvalent cation containing products at least 2 hours before or 4 hours after oral cabotegravir. Risk D: Consider therapy modification
Calcium Acetate: Calcium Salts may enhance the adverse/toxic effect of Calcium Acetate. Risk X: Avoid combination
Calcium Channel Blockers: Calcium Salts may diminish the therapeutic effect of Calcium Channel Blockers. Risk C: Monitor therapy
Cardiac Glycosides: Calcium Salts may enhance the arrhythmogenic effect of Cardiac Glycosides. Risk C: 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. Risk D: Consider therapy modification
DOBUTamine: Calcium Salts may diminish the therapeutic effect of DOBUTamine. Risk C: 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. Risk D: 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. Risk D: 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. Risk D: 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. Risk D: Consider therapy modification
Levonadifloxacin: Calcium Salts may decrease the serum concentration of Levonadifloxacin. Risk X: Avoid combination
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. Risk D: Consider therapy modification
Multivitamins/Minerals (with ADEK, Folate, Iron): May increase the serum concentration of Calcium Salts. Risk C: 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. Risk D: 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. Risk D: 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 oral calcium to minimize this interaction. Monitor for decreased therapeutic effects of quinolones during coadministration. Risk D: 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. Risk D: Consider therapy modification
Roxadustat: Polyvalent Cation Containing Products may decrease the serum concentration of Roxadustat. Management: Administer roxadustat at least 1 hour after the administration of oral polyvalent cation containing products. Risk D: 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. Risk D: 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. Risk D: Consider therapy modification
Thiazide and Thiazide-Like Diuretics: May increase the serum concentration of Calcium Salts. Risk C: 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. Monitor for decreased therapeutic effects of thyroid products if an oral calcium supplement is initiated/dose increased. Risk D: Consider therapy modification
Trientine: Polyvalent Cation Containing Products may decrease the serum concentration of Trientine. Management: Avoid concomitant use of trientine and polyvalent cations. If oral iron supplements are required, separate the administration by 2 hours. For other oral polyvalent cations, give trientine 1 hour before, or 1 to 2 hours after the polyvalent cation. Risk D: Consider therapy modification
Unithiol: May diminish the therapeutic effect of Polyvalent Cation Containing Products. Risk X: Avoid combination
Vitamin D Analogs: Calcium Salts may enhance the adverse/toxic effect of Vitamin D Analogs. Risk C: Monitor therapy
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).
Calcium is excreted in breast milk. The amount of calcium in breast milk is homeostatically regulated and not altered by maternal calcium intake. Calcium requirements are the same in lactating and nonlactating females (IOM, 2011).
Dietary reference intake for calcium (IOM 2011):
0 to <6 months: Adequate intake: 200 mg elemental calcium/day.
6 to 12 months: Adequate intake: 260 mg elemental calcium/day.
1 to 3 years: Recommended dietary allowance (RDA): 700 mg elemental calcium/day.
4 to 8 years: RDA: 1,000 mg elemental calcium/day.
9 to 18 years: RDA: 1,300 mg elemental calcium/day.
19 to 50 years: RDA: 1,000 mg elemental calcium/day.
51 to 70 years: RDA:
Females: 1,200 mg elemental calcium/day.
Males: 1,000 mg elemental calcium/day.
>70 years: RDA: 1,200 mg elemental calcium/day.
Pregnancy/Lactating: RDA: Requirements are the same as in nonpregnant or nonlactating females.
Monitor plasma calcium levels if using calcium salts as electrolyte supplements for deficiency.
Serum calcium: 8.6 to 10.2 mg/dL (SI: 2.2 to 2.6 mmol/L)
Due to a poor correlation between the serum ionized calcium (free) and total serum calcium, particularly in states of low albumin or acid/base imbalances, direct measurement of ionized calcium is recommended.
In low albumin states, the corrected total serum calcium may be estimated by:
Corrected total calcium (mg/dL) = measured serum calcium (mg/mL) + 0.8 (4 - measured serum albumin [g/dL])
or
Corrected total calcium (mmol/L) = measured serum calcium (mmol/L) + 0.02 (40 - measured serum albumin [g/L])
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.
Absorption: 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
Protein binding: 45%
Excretion: Primarily in the feces as unabsorbed calcium
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