Magtein Magnesium L-Threonate 2000 mg Ingredients & Drug Interactions
by SuperSmart
What is this page for?
First and foremost: checking Magtein Magnesium L-Threonate 2000 mg 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
Magtein Magnesium L-Threonate 2000 mg is a dietary supplement by SuperSmart 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 Magtein. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Magtein Magnesium L-Threonate 2000 mg by SuperSmart
Ask about any prescription or over-the-counter medication and we check it for interactions with Magtein Magnesium L-Threonate 2000 mg by SuperSmart — 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 Magtein Magnesium L-Threonate 2000 mg by SuperSmart
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, formulated as magnesium L-threonate. The capsules also contain hypromellose, acacia gum, and white rice flour as inactive ingredients (binders and fillers).
Does it work?
Strong evidence
Magnesium in this product is effective for dyspepsia (indigestion), constipation, low magnesium levels (hypomagnesemia), and pre-eclampsia in pregnancy. The evidence supports its use for these conditions when dosed appropriately.
How safe is it?
Well-documented data
Magnesium is generally well tolerated at recommended doses. Most common side effects from oral supplements are diarrhea, nausea, vomiting, and gastrointestinal irritation — especially at higher doses.
In rare cases, very high doses can cause a bezoar, a blockage in the stomach. Magnesium is needed in 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. The safety data on this product spans three ratings — likely safe, possibly safe, and possibly unsafe — so individual guidance from your doctor or pharmacist is important.
Meds to double-check
Major interaction found
Before you take this, double-check if you're on levodopa/carbidopa for Parkinson's disease (Major interaction). Also flag any skeletal muscle relaxants, potassium-sparing diuretics, calcium channel blockers, quinolone antibiotics, bisphosphonates, sulfonylureas, or acid reducers — magnesium affects all of them (Moderate interactions).
Use the search tool on this page to verify your medications.
The bottom line
Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
Magnesium supplements work well for indigestion, constipation, and low magnesium levels. If you take Parkinson's medications, heart drugs, diabetes pills, antibiotics, or bone medications, you'll need to check your exact prescriptions with the tool below before starting.
Talk to your pharmacist about timing and dosing to avoid conflicts.
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 Jul 24, 2025.
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 Magtein Magnesium L-Threonate 2000 mg, straight from the product label.
| Brand | SuperSmart |
|---|---|
| Barcode (UPC) | 5453003826224 |
| Net contents | 120 Vegetarian Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jul 24, 2025 |
| DSLD ID | 332706 |
| Product type | Mineral |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, 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 Magtein Magnesium L-Threonate 2000 mg by SuperSmart, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Magnesium | 144 mg | -- |
| Magtein | 2000 mg | 34% |
Other ingredients: Hypromellose, Acacia Gum, White Rice Flour
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)
Magtein is a trademark of Magceutics, Inc, & exclusively distributed by AIDP, Inc. Magtein is protected under US patents 8,178,118; 8,142,803; 8,163,301; and other pending patents.
Formula
Magtein Magnesium L-Threonate 2000 mg per day
Each capsule contains 500 mg of Magtein.
FDA Statement of Identity
Dietary Supplement
Formulation
Guarantees: Vegan, non-GMO, gluten free, soy free, dairy free.
Guarantees: Vegan, non-GMO, gluten free, soy free, dairy free. No coloring, preservatives, or flavorings.
Good Manufacturing Practice, FDA registered lab, made in USA.
Suggested/Recommended/Usage/Directions
Directions: Adults. As a supplement, take 2 capsules two times daily or as directed by the practitioner.
Precautions
Cautions: Do not exceed the recommended daily dose. Tamper evident: Do not use if seal under cap is broken or missing.
Keep out of reach of children.
Consult a healthcare provider before using this product if pregnant, breastfeeding, or having health concerns.
Storage
Store away from direct light, heat and humidity.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Magtein Magnesium L-Threonate 2000 mg by SuperSmart 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 Magtein Magnesium L-Threonate 2000 mg by SuperSmart
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size2 Capsule(s) Dosage formCapsule Servings per container30 Amounts shown are per serving.
Magtein
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...
Magtein monograph & interactionsOther (inactive) ingredients: Hypromellose, Acacia Gum, White Rice Flour. These complete the product’s ingredient list but are not active constituents.
Magtein Magnesium L-Threonate 2000 mg by SuperSmart Drug Interactions
HelloPharmacist Interaction Report
Magtein Magnesium L-Threonate by SuperSmart contains magnesium, which interacts with a number of medications.
The most serious concern is with levodopa/carbidopa (Sinemet), a Parkinson's medication — magnesium can cut the drug's blood levels by a third or more, potentially reducing how well it works for you.
Read the full breakdown — every affected drug type, severity by severity
Moderate interactions exist with several other drug types. Skeletal muscle relaxants may work faster and last longer when combined with magnesium.
Potassium-sparing diuretics (water pills that conserve potassium) may cause your magnesium to build up. Calcium channel blockers (heart and blood-pressure medications) can have additive effects with magnesium, risking low blood pressure.
Quinolone antibiotics (like ciprofloxacin) and bisphosphonates (bone medications) absorb poorly alongside magnesium — separate them by at least 2 hours. Magnesium also increases how much your body absorbs sulfonylureas (diabetes drugs), raising the risk of low blood sugar.
Acid reducers and antacids may reduce magnesium's laxative effect, so you may need a higher dose.
Altogether, these interactions span 293 individual medications. Use the interaction checker below with your exact prescriptions before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Magtein Magnesium L-Threonate 2000 mg?
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Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Magtein Magnesium L-Threonate 2000 mg interact with 295 drugs. Click any drug to see the details.
1 of the 1 ingredient in Magtein Magnesium L-Threonate 2000 mg interact with drugs. Each result below shows which ingredient is responsible. Magtein
Benserazide, LevodopaMadopar, Prolopa
How Benserazide, Levodopa interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magtein + Benserazide, Levodopa interactionCarbidopaLodosyn
How Carbidopa interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magtein + Carbidopa interactionCarbidopa, LevodopaDhivy, Rytary, Sinemet, Sinemet CR
How Carbidopa, Levodopa interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magtein + Carbidopa, Levodopa interactionCarbidopa, Levodopa, EntacaponeStalevo
How Carbidopa, Levodopa, Entacapone interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magtein + Carbidopa, Levodopa, Entacapone interactionLevodopaInbrija, Larodopa
How Levodopa interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magtein + Levodopa interactionLevodopa, CarbidopaDuodopa
How Levodopa, Carbidopa interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magtein + Levodopa, Carbidopa interactionAcetaminophen, ChlorzoxazoneAcetazone Forte, Extra Strength Tylenol Aches & Strains, Parafon Forte
How Acetaminophen, Chlorzoxazone interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSkeletal 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 Magtein + Acetaminophen, Chlorzoxazone interactionAcetaminophen, Chlorzoxazone, CodeineAcetazone Forte C8, Parafon Forte C8
How Acetaminophen, Chlorzoxazone, Codeine interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSkeletal 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 Magtein + Acetaminophen, Chlorzoxazone, Codeine interactionAcetaminophen, Codeine, MethocarbamolAcetaminophen, Codeine, Methocarbamol, Robaxacet 8
How Acetaminophen, Codeine, Methocarbamol interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSkeletal 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 Magtein + Acetaminophen, Codeine, Methocarbamol interactionAcetaminophen, MethocarbamolRobaxacet
How Acetaminophen, Methocarbamol interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSkeletal 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 Magtein + Acetaminophen, Methocarbamol interactionAcetaminophen, OrphenadrineOrfenagesic
How Acetaminophen, Orphenadrine interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSkeletal 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 Magtein + Acetaminophen, Orphenadrine interactionAcetohexamideDymelor
How Acetohexamide interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSulfonylureas Moderate
Interaction Summary
Magnesium increases the systemic absorption of sulfonylureas, increasing their effects and side effects.
Read the full Magtein + Acetohexamide interactionAlcuroniumAlcuronium
How Alcuronium interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinSkeletal 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 Magtein + Alcuronium interactionAlendronateBinosto, Fosamax
How Alendronate interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinBisphosphonates Moderate
Interaction Summary
Magnesium can decrease absorption of bisphosphonates.
Read the full Magtein + Alendronate interactionAlendronate Sodium
How Alendronate Sodium interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinBisphosphonates Moderate
Interaction Summary
Magnesium can decrease absorption of bisphosphonates.
Read the full Magtein + Alendronate Sodium interactionAlendronate Sodium, CholecalciferolFosamax Plus D
How Alendronate Sodium, Cholecalciferol interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinBisphosphonates Moderate
Interaction Summary
Magnesium can decrease absorption of bisphosphonates.
Read the full Magtein + Alendronate Sodium, Cholecalciferol interactionAlginic Acid, Aluminum HydroxideRafton
How Alginic Acid, Aluminum Hydroxide interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magtein + Alginic Acid, Aluminum Hydroxide interactionAluminum HydroxideAlu-Cap, Amphojel, Gaviscon
How Aluminum Hydroxide interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magtein + Aluminum Hydroxide interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAnticoagulant/antiplatelet Drugs, Antacids Moderate
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magtein + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAnticoagulant/antiplatelet Drugs, Antacids Moderate
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magtein + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAluminum Hydroxide, Magnesium Hydroxide (otc Drug)Maalox, Mucogel
How Aluminum Hydroxide, Magnesium Hydroxide (otc Drug) interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magtein + Aluminum Hydroxide, Magnesium Hydroxide (otc Drug) interactionAluminum Hydroxide, Magnesium Hydroxide, Simethicone (otc Drug)Mylanta
How Aluminum Hydroxide, Magnesium Hydroxide, Simethicone (otc Drug) interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magtein + Aluminum Hydroxide, Magnesium Hydroxide, Simethicone (otc Drug) interactionAluminum, Magnesium (otc Drug)Almagel
How Aluminum, Magnesium (otc Drug) interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magtein + Aluminum, Magnesium (otc Drug) interactionAmikacinAmikin, Arikayce
How Amikacin interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinAminoglycoside Antibiotics Moderate
Interaction Summary
Concomitant use of aminoglycoside antibiotics and magnesium can increase the risk for neuromuscular weakness.
Read the full Magtein + Amikacin interactionAmilorideAmilamont, Midamor
How Amiloride interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magtein + Amiloride interactionAmiloride, HydrochlorothiazideAmil-Co, Amilzide, Moduret 25, Moduretic
How Amiloride, Hydrochlorothiazide interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magtein + Amiloride, Hydrochlorothiazide interactionAmlodipineNorliqva
How Amlodipine interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magtein + Amlodipine interactionAmlodipine BenzoateKaterzia
How Amlodipine Benzoate interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magtein + Amlodipine Benzoate interactionAmlodipine BesilateIstin
How Amlodipine Besilate interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magtein + Amlodipine Besilate interactionAmlodipine BesylateNorvasc
How Amlodipine Besylate interacts with Magtein Magnesium L-Threonate 2000 mg — through 1 ingredient. Tap an ingredient for the detail:
MagteinCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magtein + Amlodipine Besylate interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Magtein Magnesium L-Threonate 2000 mg 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.
Magtein
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 Magtein Magnesium L-Threonate 2000 mg, from the product label.
SuperSmart
See all SuperSmart products- Name
- SuperSmart USA LLC
- City
- Miami
- State
- FL
- ZipCode
- 33130
- Phone Number
- 1 (786) 522-3907
- Web Address
- us.SuperSmart.com
Magtein Magnesium L-Threonate 2000 mg by SuperSmart: Common Questions
Does Magtein Magnesium L-Threonate 2000 mg by SuperSmart interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Does magnesium really help with constipation?
Can I take this while pregnant?
What's the most common side effect I might notice?
Is this form of magnesium different from regular magnesium supplements?
What if I take an antibiotic — do I need to space this out?
Can magnesium help my blood pressure?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Magtein Magnesium L-Threonate 2000 mg is safe with your meds?
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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 Magtein Magnesium L-Threonate 2000 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Magtein Magnesium L-Threonate 2000 mg'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
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