Calcium Gluconate Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Calcium Gluconate against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
Calcium Gluconate is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for bone health and osteoporosis prevention, dietary calcium deficiency, heartburn relief (calcium carbonate antacids).Based on those ingredients, 168 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Calcium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Calcium Gluconate by BulkSupplements.com
Ask about any prescription or over-the-counter medication and we check it for interactions with Calcium Gluconate by BulkSupplements.com — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Calcium Gluconate by BulkSupplements.com
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Full disclosure
Calcium Gluconate contains one active ingredient: calcium. This supplement provides a form of calcium used to correct low blood calcium (hypocalcemia), support bone strength in osteoporosis, manage high potassium levels (hyperkalemia) in the blood, treat kidney failure-related mineral problems, and ease stomach upset (dyspepsia).
The product contains no inactive fillers or other ingredients beyond the calcium itself.
Does it work?
Strong evidence
Calcium is effective for correcting low blood calcium and supporting bone health in osteoporosis. It's also effective for treating stomach upset and managing high blood potassium and certain kidney failure complications.
For osteoporosis specifically, the evidence supports its use as likely effective when taken at recommended doses.
How safe is it?
Well-documented data
Calcium is generally well tolerated at recommended doses, though high amounts can cause issues. The most common side effects when taken by mouth are belching, constipation, diarrhea, gas, and stomach upset.
Rarely, very high doses have been linked in case reports to kidney stones and a serious skin condition called calciphylaxis. Some research suggests that calcium intake above 1500–2000 mg daily might be associated with increased risk of prostate cancer and cardiovascular disease, though these findings are debated.
During pregnancy and breastfeeding, adequate calcium is important; stay within recommended amounts unless your doctor advises otherwise.
Meds to double-check
Major interaction found
Before taking this product, check with your doctor or pharmacist if you use any HIV integrase inhibitors (dolutegravir, elvitegravir, raltegravir), the antibiotic ceftriaxone (especially intravenously), levothyroxine for thyroid replacement, sotalol for heart rhythm, calcipotriene for psoriasis, or diltiazem for blood pressure. These require spacing from calcium or careful monitoring to keep them working properly.
The bottom line
Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Major medication interactions have been identified, and safety information is well characterized.
Calcium Gluconate is an effective, well-tolerated supplement for bone health and correcting low blood calcium — as long as you take it correctly and away from certain medications. If you're on HIV drugs, antibiotics like ceftriaxone, thyroid replacement, heart medications, or a psoriasis treatment, you'll need to plan the timing carefully with your doctor or pharmacist.
Talk it over with your own healthcare provider before starting, especially if you take any prescription medications.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Apr 23, 2024.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about Calcium Gluconate, straight from the product label.
| Brand | BulkSupplements.com |
|---|---|
| Barcode (UPC) | X000HEZC8P |
| Net contents | 500 Gram(s); 17.6 Ounce(s) |
| Market status | On market |
| Date entered into DSLD | Apr 23, 2024 |
| DSLD ID | 311266 |
| Product type | Mineral |
| Supplement form | Powder |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Dairy Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for Calcium Gluconate by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Calcium | 55 mg | 4% |
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Brand IP Statement(s)
BulkSupplements.com Clean & pure bulk supplements
FDA Disclaimer Statement
Warning: This product is not intended to diagnose, treat, cure, or prevent any disease.
Precautions
Always consult a physician before taking any dietary supplement.
Keep out of reach of children.
Formulation
Free of: Added sugar, soy, dairy, yeast, additives
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, take 600 mg (about 1/4 tsp) once or twice daily, or as directed by a physician.
General Statements
Use an accurate milligram scale. New
Storage
Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Calcium Gluconate by BulkSupplements.com label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in Calcium Gluconate by BulkSupplements.com
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size600 mg Dosage formPowder Servings per container833 Amounts shown are per serving.
Calcium
Interacts with168 drugs
Calcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet f...
Calcium monograph & interactionsCalcium Gluconate by BulkSupplements.com Drug Interactions
HelloPharmacist Interaction Report
Calcium Gluconate by BulkSupplements.com interacts with a number of medications, most notably with HIV integrase inhibitors and certain antibiotics.
The most serious interaction is with ceftriaxone (Rocephin), an antibiotic: when given intravenously alongside calcium, they can form a salt that deposits in the lungs and kidneys — a potentially life-threatening complication. You'll need to space intravenous calcium at least 48 hours away from intravenous ceftriaxone.
Read the full breakdown — every affected drug type, severity by severity
Calcium also significantly reduces blood levels of the HIV drugs dolutegravir (Tivicay) and elvitegravir (Vitekta), cutting their effectiveness. These need to be spaced 2–6 hours apart from calcium depending on the drug.
It moderately lowers raltegravir (Isentress) levels as well, though usually not enough to require a dose change. Additionally, calcium interferes with levothyroxine (Synthroid) absorption for thyroid replacement, sotalol (Betapace) for heart rhythm, and may blunt diltiazem (Cardizem) for blood pressure — all need to be separated by several hours.
Combining calcium with the psoriasis medicine calcipotriene (Dovonex) may raise the risk of high blood calcium (hypercalcemia).
Altogether, these interactions span 168 individual medications. Check your exact medications with the tool on this page before starting calcium, and talk with your doctor or pharmacist about spacing if you take any of these drugs.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Calcium Gluconate?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Calcium Gluconate interact with 168 drugs. Click any drug to see the details.
1 of the 1 ingredient in Calcium Gluconate interact with drugs. Each result below shows which ingredient is responsible. Calcium
NorfloxacinNorflox, Noroxin
How Norfloxacin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Norfloxacin interactionOfloxacinFloxin, Floxin Injection, Floxin Otic, Oflox
How Ofloxacin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Ofloxacin interactionOmadacycline (iv)Nuzyra
How Omadacycline (iv) interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumTetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of tetracycline antibiotics.
Read the full Calcium + Omadacycline (iv) interactionOmadacycline (oral)Nuzyra
How Omadacycline (oral) interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumTetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of tetracycline antibiotics.
Read the full Calcium + Omadacycline (oral) interactionOxytetracyclineTerramycin
How Oxytetracycline interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumTetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of tetracycline antibiotics.
Read the full Calcium + Oxytetracycline interactionOxytetracycline, Phenazopyridine, SulfamethizoleUrobiotic
How Oxytetracycline, Phenazopyridine, Sulfamethizole interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumTetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of tetracycline antibiotics.
Read the full Calcium + Oxytetracycline, Phenazopyridine, Sulfamethizole interactionOzenoxacinXepi
How Ozenoxacin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Ozenoxacin interactionPamidronateAredia
How Pamidronate interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Pamidronate interactionPolythiazideRenese
How Polythiazide interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Polythiazide interactionPolythiazide, PrazosinMinizide
How Polythiazide, Prazosin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Polythiazide, Prazosin interactionPolythiazide, ReserpineRenese R
How Polythiazide, Reserpine interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Polythiazide, Reserpine interactionRaltegravirIsentress
How Raltegravir interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumRaltegravir (isentress) Moderate
Interaction Summary
Calcium may reduce levels of raltegravir.
Read the full Calcium + Raltegravir interactionReserpine, TrichlormethiazideMetatensin #2, Metatensin #4, Naquival
How Reserpine, Trichlormethiazide interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Reserpine, Trichlormethiazide interactionRetapamulinAltabax, Altargo
How Retapamulin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics, Tetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Retapamulin interactionRisedronateActonel DR
How Risedronate interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Risedronate interactionRisedronate SodiumActonel, Actonel Once a Week
How Risedronate Sodium interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Risedronate Sodium interactionSotalolBetapace, Betapace AF, Sorine, Sotacor
How Sotalol interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumSotalol (betapace) Moderate
Interaction Summary
Calcium seems to reduce the absorption of sotalol.
Read the full Calcium + Sotalol interactionSotalol HydrochlorideSotylize
How Sotalol Hydrochloride interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumSotalol (betapace) Moderate
Interaction Summary
Calcium seems to reduce the absorption of sotalol.
Read the full Calcium + Sotalol Hydrochloride interactionSparfloxacinZagam
How Sparfloxacin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Sparfloxacin interactionTenofovir Disoproxil FumarateViread
How Tenofovir Disoproxil Fumarate interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Read the full Calcium + Tenofovir Disoproxil Fumarate interactionTenofovir, Emtricitabine, EfavirenzAtripla
How Tenofovir, Emtricitabine, Efavirenz interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Read the full Calcium + Tenofovir, Emtricitabine, Efavirenz interactionTetracyclineAchromycin, Achromycin V, Nor-Tet, Robitet, Sumycin, Sumycin 250 +6 more
How Tetracycline interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumTetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of tetracycline antibiotics.
Read the full Calcium + Tetracycline interactionTigecyclineTygacil
How Tigecycline interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics, Tetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Tigecycline interactionTiludronate DisodiumSkelid
How Tiludronate Disodium interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Tiludronate Disodium interactionTrandolapril, VerapamilTarka
How Trandolapril, Verapamil interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumVerapamil (calan, Others), Calcium Channel Blockers Moderate
Interaction Summary
Theoretically, calcium may reduce the therapeutic effects of verapamil.
Read the full Calcium + Trandolapril, Verapamil interactionTrichlormethiazideAq 4B Aquazide, Marazide II, Metahydrin, Naqua
How Trichlormethiazide interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Trichlormethiazide interactionTrovafloxacinTrovan, Trovan Injection
How Trovafloxacin interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumQuinolone Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of quinolone antibiotics.
Read the full Calcium + Trovafloxacin interactionVerapamilCalan, Calan SR, Covera HS, Isoptin, Isoptin SR, Veramil +3 more
How Verapamil interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumVerapamil (calan, Others), Calcium Channel Blockers Moderate
Interaction Summary
Theoretically, calcium may reduce the therapeutic effects of verapamil.
Read the full Calcium + Verapamil interactionZoledronic AcidAclasta, Reclast, Zometa
How Zoledronic Acid interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Zoledronic Acid interactionEmtricitabine, TenofovirTruvada
How Emtricitabine, Tenofovir interacts with Calcium Gluconate — through 1 ingredient. Tap an ingredient for the detail:
CalciumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Read the full Calcium + Emtricitabine, Tenofovir interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Calcium Gluconate with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
Calcium
Ceftriaxone (Rocephin)
Co-administration of intravenous calcium and ceftriaxone can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys.
Avoid administering intravenous calcium in any form, such as parenteral nutrition or Lactated Ringers, within 48 hours of intravenous ceftriaxone. Case reports in neonates show that administering intravenous ceftriaxone and calcium can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys. In several cases, neonates have died as a result of this interaction. So far there are no reports in adults; however, there is still concern that this interaction might occur in adults.
Dolutegravir (Tivicay)
Calcium seems to reduce levels of dolutegravir.
Advise patients to take dolutegravir either 2 hours before or 6 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium carbonate 1200 mg concomitantly with dolutegravir 50 mg reduces plasma levels of dolutegravir by almost 40%. Calcium appears to decrease levels of dolutegravir through chelation.
Elvitegravir (Vitekta)
Calcium seems to reduce levels of elvitegravir.
Advise patients to take elvitegravir either 2 hours before or 2 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium along with elvitegravir can reduce blood levels of elvitegravir through chelation.
Aluminum
Calcium citrate might increase aluminum absorption and toxicity. Other types of calcium do not increase aluminum absorption.
Calcium citrate can increase the absorption of aluminum when taken with aluminum hydroxide. The increase in aluminum levels may become toxic, particularly in individuals with kidney disease. However, the effect of calcium citrate on aluminum absorption is due to the citrate anion rather than calcium cation. Calcium acetate does not appear to increase aluminum absorption.
Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)
Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide and calcium can be taken together if taken with food. However, if taken on an empty stomach, bictegravir/emtricitabine/tenofovir alafenamide should not be taken with, or 2 hours after, calcium containing products.
Bisphosphonates
Calcium reduces the absorption of bisphosphonates.
Advise patients to take bisphosphonates at least 30 minutes before calcium, but preferably at a different time of day. Calcium supplements decrease absorption of bisphosphonates.
Calcipotriene (Dovonex)
Taking calcipotriene with calcium might increase the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with calcium supplements might increase the risk of hypercalcemia.
Digoxin (Lanoxin)
Using intravenous calcium with digoxin might increase the risk of fatal cardiac arrhythmias.
Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. However, one retrospective analysis of clinical data suggests that intravenous calcium does not increase the risk of dysrhythmias or mortality in patients receiving digoxin.
Diltiazem (Cardizem, Others)
Theoretically, calcium may reduce the therapeutic effects of diltiazem.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, calcium might increase this risk of hypercalcemia and reduce the effectiveness of diltiazem.
Levothyroxine (Synthroid, Others)
Calcium seems to reduce the absorption and effectiveness of levothyroxine.
Advise patients to take levothyroxine and calcium supplements at least 4 hours apart. Calcium reduces levothyroxine absorption, probably by forming insoluble complexes. Calcium carbonate supplements reduce effectiveness of levothyroxine in patients with hypothyroidism.
Lithium
Theoretically, concomitant use of calcium and lithium may increase this risk of hypercalcemia.
Clinical research suggests that long-term use of lithium may cause hypercalcemia in 10% to 60% of patients. Theoretically, concomitant use of lithium and calcium supplements may further increase this risk.
Quinolone Antibiotics
Calcium seems to reduce the absorption of quinolone antibiotics.
Advise patients to take oral quinolones at least 2 hours before or 4-6 hours after calcium supplements or calcium-fortified foods. Taking calcium at the same time as oral quinolones can reduce quinolone absorption. Calcium binds to quinolones in the gut.
Raltegravir (Isentress)
Calcium may reduce levels of raltegravir.
Pharmacokinetic research shows that taking a single dose of calcium carbonate 3000 mg along with raltegravir 400 mg twice daily modestly decreases the mean area under the curve of raltegravir, but the decrease does not necessitate a dose adjustment of raltegravir. However, a case of elevated HIV-1 RNA levels and documented resistance to raltegravir has been reported for a patient taking calcium carbonate 1 gram three times daily plus vitamin D3 (cholecalciferol) 400 IU three times daily in combination with raltegravir 400 mg twice daily for 11 months. It is thought that calcium reduced raltegravir levels by chelation, leading to treatment failure.
Sotalol (Betapace)
Calcium seems to reduce the absorption of sotalol.
Advise patients to separate doses by at least 2 hours before or 4-6 hours after calcium. Calcium appears to reduce the absorption of sotalol, probably by forming insoluble complexes.
Tetracycline Antibiotics
Calcium seems to reduce the absorption of tetracycline antibiotics.
Advise patients to take oral tetracyclines at least 2 hours before, or 4-6 hours after calcium supplements. Taking calcium at the same time as oral tetracyclines can reduce tetracycline absorption. Calcium binds to tetracyclines in the gut.
Thiazide Diuretics
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Thiazides reduce calcium excretion by the kidneys. Using thiazides along with moderately large amounts of calcium carbonate increases the risk of milk-alkali syndrome (hypercalcemia, metabolic alkalosis, renal failure). Patients may need to have their serum calcium levels and/or parathyroid function monitored regularly.
Verapamil (Calan, Others)
Theoretically, calcium may reduce the therapeutic effects of verapamil.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, use of calcium supplements may increase this risk of hypercalcemia and reduce the effectiveness of verapamil.
Calcium Channel Blockers
Intravenous calcium may decrease the effects of calcium channel blockers; oral calcium is unlikely to have this effect.
Intravenous calcium is used to decrease the effects of calcium channel blockers in the management of overdose. Intravenous calcium gluconate has been used before intravenous verapamil (Isoptin) to prevent or reduce the hypotensive effects without affecting the antiarrhythmic effects. But there is no evidence that dietary or supplemental calcium when taken orally interacts with calcium channel blockers.
Brand information
Manufacturer and brand details for Calcium Gluconate, from the product label.
BulkSupplements.com
See all BulkSupplements.com products- Name
- BulkSupplements.com
- Street Address
- 7511 Eastgate Rd
- City
- Henderson
- State
- NV
- ZipCode
- 89011
- Web Address
- BulkSupplements.com
Calcium Gluconate by BulkSupplements.com: Common Questions
Does Calcium Gluconate by BulkSupplements.com interact with any medications?
How can one product interact with so many drugs?
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Calcium Gluconate is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind Calcium Gluconate’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Calcium Gluconate's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 62 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Calcium 62 references
- Shils M, Olson A, Shike M. Modern Nutrition in Health and Disease. 8th ed. Philadelphia, PA: Lea and Febiger, 1994.
- Hernandez-Avila M, Gonzalez-Cossio T, Hernandez-Avila JE, et al. Dietary calcium supplements to lower blood lead levels in lactating women: a randomized placebo-controlled trial. Epidemiology 2003;14:206-12.. PubMed
- Thys-Jacobs S, Ceccarelli S, Bierman A, et al. Calcium supplementation in premenstrual syndrome: a randomized crossover trial. J Gen Intern Med 1989;4:183-9. PubMed
- Maton PN, Burton ME. Antacids revisited: a review of their clinical pharmacology and recommended therapeutic use. Drugs 1999;57:855-70.
- Clemens JD, Feinstein AR. Calcium carbonate and constipation: a historical review of medical mythopoeia. Gastroenterology 1977;72:957-61. DOI
- Saunders D, Sillery J, Chapman R. Effect of calcium carbonate and aluminum hydroxide on human intestinal function. Dig Dis Sci 1988;33:409-13. PubMed
- Friedman PA, Bushinsky DA. Diuretic effects on calcium metabolism. Semin Nephrol 1999;19:551-6.
- Koo WK, Walters JC, Esterlitz J, et al. Maternal calcium supplementation and fetal bone mineralization. Obstet Gynecol 1999;94:577-82. DOI
- Raman L, Rajalakshmi K, Krishnamachari KAVR, et al. Effect of calcium supplementation to undernourished mothers during pregnancy on the bone density of the neonates. Am J Clin Nutr 1978; 31:466-9. DOI
- Murry JJ, Healy MD. Drug-mineral interactions: a new responsibility for the hospital dietician. J Am Diet Assoc 1991;91:66-73.
- Chan JM, Giovannucci E, Andersson SO, et al. Dairy products, calcium, phosphorous, vitamin D, and risk of prostate cancer. Cancer Causes Control 1998;9:559-66.
- Butner LE, Fulco PP, Feldman G, et al. Calcium carbonate-induced hypothyroidism. Ann Intern Med 2000:132:595. PubMed
- Schneyer CR. Calcium carbonate and reduction of levothyroxine efficacy. JAMA 1998;279:750. PubMed
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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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