Magnesium Citrate Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Magnesium Citrate 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
Magnesium Citrate is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for preventing or treating magnesium deficiency, constipation, muscle cramps.Based on those ingredients, 295 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Magnesium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Magnesium Citrate by BulkSupplements.com
Ask about any prescription or over-the-counter medication and we check it for interactions with Magnesium Citrate 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 Magnesium Citrate 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
This product contains one active ingredient: magnesium (in citrate form). It's a mineral your body uses for muscle and nerve function, energy production, and bone health.
There are no inactive ingredients listed for this powder.
Does it work?
Strong evidence
Magnesium is effective for relieving indigestion (dyspepsia) and constipation. It's also effective for correcting low magnesium levels (hypomagnesemia) and, in clinical settings under medical supervision, for preventing and treating pre-eclampsia in pregnancy.
Keep in mind: those last two — correcting deficiency and pre-eclampsia prevention — are medical uses you'd do under your doctor's care, not on your own.
How safe is it?
Well-documented data
Magnesium is generally well tolerated by healthy adults at recommended doses. The most common side effects from taking it by mouth are diarrhea, nausea, vomiting, and stomach irritation — in fact, the laxative effect is often why people take it.
Serious side effects are rare but can include a blockage in the gut (a bezoar) from very high doses over time. For pregnancy: magnesium is needed during pregnancy, but use supplements only under your doctor's guidance.
During breastfeeding, normal dietary amounts are fine, but check with your doctor before taking supplements.
Meds to double-check
Major interaction found
Before taking this product, check with your doctor or pharmacist if you take levodopa/carbidopa (Sinemet), skeletal muscle relaxants, calcium channel blockers, potassium-sparing diuretics, sulfonylureas (diabetes drugs), quinolone antibiotics, bisphosphonates, or antacids. Magnesium can reduce how well some of these work or increase their side effects.
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.
Magnesium Citrate works well for indigestion and constipation and can correct low magnesium levels. If you take levodopa/carbidopa for Parkinson's, a skeletal muscle relaxant, a blood pressure medication, diabetes medication, or an antibiotic, you'll want to check your exact medications before starting this — the timing and doses matter.
Talk with your doctor or pharmacist before adding this to your routine, especially if you're pregnant, breastfeeding, or taking any prescription drugs.
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 Mar 22, 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 Magnesium Citrate, straight from the product label.
| Brand | BulkSupplements.com |
|---|---|
| Barcode (UPC) | X000IXTFNX |
| Net contents | 250 Gram(s); 8.8 Ounce(s) |
| Market status | On market |
| Date entered into DSLD | Mar 22, 2024 |
| DSLD ID | 310739 |
| Product type | Mineral |
| Supplement form | Powder |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar 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 Magnesium Citrate by BulkSupplements.com, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Magnesium | 400 mg | 95% |
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: Sugar, soy, dairy, yeast, gluten, additives
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, take 3500 mg (about 1 1/3 tsp) once daily with water, 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, dark place.
Formula
Magnesium for sleep Magnesium powder Magnesium Citrate laxative
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Magnesium Citrate 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 Magnesium Citrate by BulkSupplements.com
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size3500 mg Dosage formPowder Servings per container71 Amounts shown are per serving.
Magnesium
Interacts with295 drugs
Magnesium is an essential mineral your body needs for muscles, nerves, blood pressure, and many other functions, and supplements are useful for preven...
Magnesium monograph & interactionsMagnesium Citrate by BulkSupplements.com Drug Interactions
HelloPharmacist Interaction Report
Magnesium Citrate by BulkSupplements.com interacts with several medication types, with the most serious being levodopa/carbidopa (a Parkinson's medication).
Magnesium can cut the amount of levodopa your body absorbs by 35% and carbidopa by 81%, making the drug much less effective at controlling your symptoms.
Read the full breakdown — every affected drug type, severity by severity
Moderate interactions occur with skeletal muscle relaxants — magnesium can speed up how quickly they kick in and extend how long they work, raising the risk of side effects. It also affects potassium-sparing diuretics (water pills that preserve potassium), calcium channel blockers (blood pressure drugs), antacids, sulfonylureas (diabetes medications that boost insulin), quinolone antibiotics, and bisphosphonates (bone-strengthening drugs).
With sulfonylureas, magnesium increases absorption and raises the risk of dangerously low blood sugar (hypoglycemia).
Altogether, these interactions span 295 individual medications. If you take any prescription medication, run it through the search tool on this page before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Magnesium Citrate?
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 Magnesium Citrate interact with 295 drugs. Click any drug to see the details.
1 of the 1 ingredient in Magnesium Citrate interact with drugs. Each result below shows which ingredient is responsible. Magnesium
DantroleneDantrium, Dantrium Intravenous
How Dantrolene interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Dantrolene interactionDantrolene SodiumRyanodex
How Dantrolene Sodium interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Dantrolene Sodium interactionDarunavir, Cobicistat, Emtricitabine, Tenofovir AlafenamideSymtuza
How Darunavir, Cobicistat, Emtricitabine, Tenofovir Alafenamide interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Darunavir, Cobicistat, Emtricitabine, Tenofovir Alafenamide interactionDemeclocyclineDeclomycin
How Demeclocycline interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Demeclocycline interactionDibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug)K-Phos Neutral
How Dibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug) interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Dibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug) interactionDigoxinDigitek, Lanoxicaps, Lanoxin
How Digoxin interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumDigoxin Moderate
Interaction Summary
Magnesium salts may reduce absorption of digoxin.
Read the full Magnesium + Digoxin interactionDihydroxyaluminum Sodium CarbonateRolaids
How Dihydroxyaluminum Sodium Carbonate interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magnesium + Dihydroxyaluminum Sodium Carbonate interactionDiltiazemAdizem-SR, Adizem-XL, Angitil SR, Angitil XL, Calcicard CR, Cardizem +23 more
How Diltiazem interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magnesium + Diltiazem interactionDiltiazem, EnalaprilTeczem
How Diltiazem, Enalapril interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magnesium + Diltiazem, Enalapril interactionDolutegravir, Emtricitabine, Tenofovir AlafenamideDolutegravir, Emtricitabine, Tenofovir Alafenamide
How Dolutegravir, Emtricitabine, Tenofovir Alafenamide interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionDoripenemDoribax
How Doripenem interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics, Quinolone Antibiotics +1 Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doripenem interactionDoxacuriumNuromax
How Doxacurium interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Doxacurium interactionDoxycyclineDoryx, Doxy, Doxy-D, Doxycin, Doxycycline Injection, Doxylin +6 more
How Doxycycline interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycycline interactionDoxycycline HyclateActiclate, Acticlate Cap, Lymepak
How Doxycycline Hyclate interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycycline Hyclate interactionDoxycycline MonohydrateErfacea
How Doxycycline Monohydrate interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycycline Monohydrate interactionDoxycylineDoxychel
How Doxycyline interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycyline interactionDrospirenoneDrospirenone
How Drospirenone interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Drospirenone interactionDrospirenone, EstetrolNextstellis
How Drospirenone, Estetrol interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Drospirenone, Estetrol interactionDrospirenone, Ethinyl EstradiolAngeliq, Gianvi, Yasmin
How Drospirenone, Ethinyl Estradiol interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Drospirenone, Ethinyl Estradiol interactionElvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil FumarateStribild
How Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interactionEmtricitabineEmtriva
How Emtricitabine interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Emtricitabine interactionEmtricitabine, Rilpivirine, TenofovirComplera
How Emtricitabine, Rilpivirine, Tenofovir interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Emtricitabine, Rilpivirine, Tenofovir interactionEmtricitabine, Rilpivirine, Tenofovir AlafenamideOdefsey
How Emtricitabine, Rilpivirine, Tenofovir Alafenamide interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Emtricitabine, Rilpivirine, Tenofovir Alafenamide interactionEmtricitabine, Tenofovir Alafenamide FumarateDescovy
How Emtricitabine, Tenofovir Alafenamide Fumarate interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Emtricitabine, Tenofovir Alafenamide Fumarate interactionEnalapril Maleate, FelodipineLexxel
How Enalapril Maleate, Felodipine interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magnesium + Enalapril Maleate, Felodipine interactionEnoxacinPenetrex
How Enoxacin interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumQuinolone Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of quinolones.
Read the full Magnesium + Enoxacin interactionEravacyclineXerava
How Eravacycline interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Eravacycline interactionEthinyl Estradiol, DrospirenoneYaz
How Ethinyl Estradiol, Drospirenone interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Ethinyl Estradiol, Drospirenone interactionEtidronate DisodiumDidrocal, Didronel
How Etidronate Disodium interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumBisphosphonates Moderate
Interaction Summary
Magnesium can decrease absorption of bisphosphonates.
Read the full Magnesium + Etidronate Disodium interactionFelodipinePlendil, Renedil
How Felodipine interacts with Magnesium Citrate — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magnesium + Felodipine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Magnesium Citrate 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.
Magnesium
Levodopa/Carbidopa (Sinemet)
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Clinical research in healthy volunteers shows that taking magnesium oxide 1000 mg with levodopa 100 mg/carbidopa 10 mg reduces the area under the curve (AUC) of levodopa by 35% and of carbidopa by 81%. In vitro and animal research shows that magnesium produces an alkaline environment in the digestive tract, which might lead to degradation and reduced bioavailability of levodopa/carbidopa.
Aminoglycoside Antibiotics
Concomitant use of aminoglycoside antibiotics and magnesium can increase the risk for neuromuscular weakness.
Both aminoglycosides and magnesium reduce presynaptic acetylcholine release, which can lead to neuromuscular blockade and possible paralysis. This is most likely to occur with high doses of magnesium given intravenously.
Antacids
Use of acid reducers may reduce the laxative effect of magnesium oxide.
A retrospective analysis shows that, in the presence of H2 receptor antagonists (H2RAs) or proton pump inhibitors (PPIs), a higher dose of magnesium oxide is needed for a laxative effect. This may also occur with antacids. Under acidic conditions, magnesium oxide is converted to magnesium chloride and then to magnesium bicarbonate, which has an osmotic laxative effect. By reducing acidity, antacids may reduce the conversion of magnesium oxide to the active bicarbonate salt.
Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide should be taken at least 2 hours before or 6 hours after magnesium containing products.
Bisphosphonates
Magnesium can decrease absorption of bisphosphonates.
Cations, including magnesium, can decrease bisphosphonate absorption. Advise patients to separate doses of magnesium and these drugs by at least 2 hours.
Calcium Channel Blockers
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Magnesium inhibits calcium entry into smooth muscle cells and may therefore have additive effects with calcium channel blockers. Severe hypotension and neuromuscular blockades may occur when nifedipine is used with intravenous magnesium, although some contradictory evidence suggests that concurrent use of magnesium with nifedipine does not increase the risk of neuromuscular weakness. High doses of magnesium could theoretically have additive effects with other calcium channel blockers.
Digoxin
Magnesium salts may reduce absorption of digoxin.
Clinical evidence suggests that treatment with oral magnesium hydroxide or magnesium trisilicate reduces absorption of digoxin from the intestines. This may reduce the blood levels of digoxin and decrease its therapeutic effects.
Potassium-Sparing Diuretics
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Potassium-sparing diuretics also have magnesium-sparing properties, which can counteract the magnesium losses associated with loop and thiazide diuretics. Theoretically, increased magnesium levels could result from concomitant use of potassium-sparing diuretics and magnesium supplements.
Quinolone Antibiotics
Magnesium decreases absorption of quinolones.
Magnesium can form insoluble complexes with quinolones and decrease their absorption. Advise patients to take these drugs at least 2 hours before, or 4 to 6 hours after, magnesium supplements.
Skeletal Muscle Relaxants
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Parenteral magnesium shortens the time to onset of skeletal muscle relaxants by about 1 minute and prolongs the duration of action by about 2 minutes. Magnesium potentiates the effects of skeletal muscle relaxants by decreasing calcium-mediated release of acetylcholine from presynaptic nerve terminals, reducing postsynaptic sensitivity to acetylcholine, and having a direct effect on the membrane potential of myocytes. Magnesium also has vasodilatory actions and increases cardiac output, allowing a greater amount of muscle relaxant to reach the motor end plate. A clinical study found that low-dose rocuronium (0.45 mg/kg), when given after administration of magnesium 30 mg/kg over 10 minutes, has an accelerated onset of effect, which matches the onset of effect seen with a full-dose rocuronium regimen (0.6 mg/kg). In another clinical study, onset times for rocuronium doses of 0.3, 0.6, and 1.2 mg/kg were 86, 76, and 50 seconds, respectively, when given alone, but were reduced to 66, 44, and 38 seconds, respectively, when the doses were given after a 15-minute infusion of magnesium sulfate 60 mg/kg. Giving intraoperative intravenous magnesium sulfate, 50 mg/kg loading dose followed by 15 mg/kg/hour, reduces the onset time of rocuronium, enhances its clinical effects, reduces the dose of intraoperative opiates, and prolongs the spontaneous recovery time. It does not affect the activity of subsequently administered neostigmine.
Sulfonylureas
Magnesium increases the systemic absorption of sulfonylureas, increasing their effects and side effects.
Clinical research shows that administration of magnesium hydroxide with glyburide increases glyburide absorption, increases maximal insulin response by 35-fold, and increases the risk of hypoglycemia, when compared with glyburide alone. A similar interaction occurs between magnesium hydroxide and glipizide. The mechanism of this effect appears to be related to the elevation of gastrointestinal pH by magnesium-based antacids, increasing solubility and enhancing absorption of sulfonylureas.
Tetracycline Antibiotics
Magnesium decreases absorption of tetracyclines.
Magnesium can form insoluble complexes with tetracyclines in the gut and decrease their absorption and antibacterial activity. Advise patients to take these drugs 1 hour before or 2 hours after magnesium supplements.
Anticoagulant/Antiplatelet Drugs
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
In vitro evidence shows that magnesium sulfate inhibits platelet aggregation, even at low concentrations. Some preliminary clinical evidence shows that infusion of magnesium sulfate increases bleeding time by 48% and reduces platelet activity. However, other clinical research shows that magnesium does not affect platelet aggregation, although inhibition of platelet-dependent thrombosis can occur.
Gabapentin (Neurontin)
Gabapentin absorption can be decreased by magnesium.
Clinical research shows that giving magnesium oxide orally along with gabapentin decreases the maximum plasma concentration of gabapentin by 33%, time to maximum concentration by 36%, and area under the curve by 43%. Advise patients to take gabapentin at least 2 hours before, or 4 to 6 hours after, magnesium supplements.
Sevelamer (Renagel, Renvela)
Sevelamer may increase serum magnesium levels.
In patients on hemodialysis, sevelamer use was associated with a 0.28 mg/dL increase in serum magnesium. The mechanism of this interaction remains unclear.
Brand information
Manufacturer and brand details for Magnesium Citrate, 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
Magnesium Citrate by BulkSupplements.com: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Magnesium Citrate 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 Magnesium Citrate’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Magnesium Citrate'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 82 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.
Magnesium 82 references
- Rodin SM, Johnson BF. Pharmacokinetic interactions with digoxin. Clin Pharmacokinet 1988;15:227-44.
- Covington TR, et al. Handbook of Nonprescription Drugs. 11th ed. Washington, DC: American Pharmaceutical Association, 1996.
- Dahle LO, Berg G, Hammar M, et al. The effect of oral magnesium substitution on pregnancy-induced leg cramps. Am J Obstet Gynecol 1995;173:175-80. PubMed
- Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
- Peikert A, Wilimzig C, Kohne-Volland R. Prophylaxis of migraine with oral magnesium: results from a prospective, multi-center, placebo-controlled and double-blind randomized study. Cephalalgia 1996;16:257-63. PubMed
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: National Academy Press, 1999. Available at: http://books.nap.edu/books/0309063507/html/index.html.
- Birrer RB, Shallash AJ, Totten V. Hypermagnesemia-induced fatality following epsom salt gargles. J Emerg Med 2002;22:185-8. PubMed
- Ryan MP. Diuretics and potassium/magnesium depletion. Directions for treatment. Am J Med 1987;82:38-47.. PubMed
- Hollifield JW. Magnesium depletion, diuretics, and arrhythmias. Am J Med 1987;82:30-7.. PubMed
- Heidenreich O. Mode of action of conventional and potassium-sparing diuretics--aspects with relevance to Mg-sparing effects. Magnesium 1984;3:248-56..
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