Tri-Mag 300 Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Tri-Mag 300 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
Tri-Mag 300 is a dietary supplement by DaVinci Laboratories 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 Tri-Mag 300 by DaVinci Laboratories
Ask about any prescription or over-the-counter medication and we check it for interactions with Tri-Mag 300 by DaVinci Laboratories — 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 Tri-Mag 300 by DaVinci Laboratories
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
Tri-Mag 300 contains one active ingredient: magnesium, supplied at 300 mg per capsule. Magnesium is an essential mineral your body needs for muscle function, energy production, and bone health.
The capsule also contains inactive ingredients — microcrystalline cellulose, hypromellose, and leucine — which are fillers and binders that hold the supplement together.
Does it work?
Moderate evidence
Magnesium is effective for dyspepsia (indigestion), constipation, and magnesium deficiency (hypomagnesemia). It is also effective for pre-eclampsia (a serious blood pressure condition in pregnancy) when used under medical supervision.
The evidence we hold supports its use for these purposes.
How safe is it?
Well-documented data
Magnesium is generally well tolerated when taken at recommended amounts. The most common side effects from oral supplements are diarrhea, gastrointestinal irritation, nausea, and vomiting — which is why it's often used as a laxative.
Rare cases of serious effects have been reported with very high doses or long-term use. Magnesium is needed in pregnancy, but use supplements only under your doctor's guidance.
Normal dietary amounts are fine while breastfeeding, but check with your doctor before taking supplements.
Meds to double-check
Major interaction found
Before taking this product, check with your pharmacist if you take levodopa/carbidopa (Parkinson's treatment), skeletal muscle relaxants, potassium-sparing diuretics, calcium channel blockers (blood pressure drugs), sulfonylureas (diabetes drugs), quinolone antibiotics, bisphosphonates (bone medications), or antacids or acid reflux drugs — magnesium can alter how all of these work.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
Tri-Mag 300 is a straightforward magnesium supplement effective for constipation, indigestion, and magnesium deficiency. If you take levodopa/carbidopa for Parkinson's, or any blood pressure, diabetes, antibiotic, or bone medication, talk to your pharmacist before starting — magnesium can change how these drugs work.
Always ask your doctor before using magnesium supplements in pregnancy or while breastfeeding.
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 Dec 21, 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 Tri-Mag 300, straight from the product label.
| Brand | DaVinci Laboratories |
|---|---|
| Barcode (UPC) | 026664253910 |
| Net contents | 120 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Dec 21, 2024 |
| DSLD ID | 322210 |
| Product type | Mineral |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegetarian, Adult (18 - 50 Years), Gluten 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 Tri-Mag 300 by DaVinci Laboratories, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Magnesium | 300 mg | 71% |
Other ingredients: Microcrystalline Cellulose, Hypromellose, Leucine
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.
General Statements
Truth We pledge total truth in labeling. Our family of products contains only the purest and most potent ingredients. Guaranteed.
Formula
Tri-Mag contains three important forms of Magnesium for optimal health absorption and utilization. Magnesium supports: Adrenal hormone balance Bone health Cardiovascular functions Detoxification functions Glucose metabolism Mental health Nerve function Tooth enamel
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
FDA Statement of Identity
A Dietary Supplement
Formulation
Vegetarian
Gluten free Soy free Non-GMO
Color of this product may vary due to color variations of the natural ingredients.
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take four capsules daily. Daily amount may be divided between AM & PM, or as directed by your healthcare practitioner.
Precautions
Warning: If pregnant or nursing, consult your healthcare practitioner before taking this product.
Keep out of reach of children.
To obtain product information or report a serious adverse event, call 1-800-325-1776.
Storage
Store in a cool, dry place.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Tri-Mag 300 by DaVinci Laboratories 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 Tri-Mag 300 by DaVinci Laboratories
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.
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 & interactionsOther (inactive) ingredients: Microcrystalline Cellulose, Hypromellose, Leucine. These complete the product’s ingredient list but are not active constituents.
Tri-Mag 300 by DaVinci Laboratories Drug Interactions
HelloPharmacist Interaction Report
Tri-Mag 300 by DaVinci Laboratories contains magnesium, which interacts with a number of medications.
The most serious concern is with levodopa/carbidopa (Sinemet), used for Parkinson's disease — magnesium can cut the drug's effectiveness significantly by reducing how much of it your body absorbs.
Read the full breakdown — every affected drug type, severity by severity
Magnesium also has moderate interactions with skeletal muscle relaxants (which relax stiff muscles), potassium-sparing diuretics (water pills that preserve potassium), calcium channel blockers (blood pressure medications), sulfonylureas (diabetes drugs that lower blood sugar), quinolone antibiotics, bisphosphonates (bone medications), and antacids or acid reflux drugs. The effects range from reduced drug absorption to increased potency and side effects — for example, magnesium can boost the blood-sugar-lowering power of sulfonylureas, raising your risk of low blood sugar (hypoglycemia).
Altogether, these interactions span 293 individual medications. If you take any prescription medication, run it through the checker below before adding this supplement.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Tri-Mag 300?
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 Tri-Mag 300 interact with 295 drugs. Click any drug to see the details.
1 of the 1 ingredient in Tri-Mag 300 interact with drugs. Each result below shows which ingredient is responsible. Magnesium
AbciximabReoPro
How Abciximab interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Abrocitinib interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acenocoumarol interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetaminophen, Ibuprofen interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetylsalicylic Acid interactionAlteplase, TpaActilyse, Activase
How Alteplase, Tpa interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Alteplase, Tpa interactionAnacaulase-bcdbNexoBrid
How Anacaulase-bcdb interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Anacaulase-bcdb interactionAnagrelideAgrylin
How Anagrelide interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Anagrelide interactionAnisindioneMiradon
How Anisindione interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Anisindione interactionAntithrombin IiiThrombate III
How Antithrombin Iii interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Antithrombin Iii interactionApixabanEliquis
How Apixaban interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Apixaban interactionArgatrobanArgatroban
How Argatroban interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Argatroban interactionAspirinAngettes 75, ASA, Asaphen, Aspirin, Caprin, Cartia +8 more
How Aspirin interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin interactionAspirin, ButalbitalAxotal
How Aspirin, Butalbital interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Butalbital interactionAspirin, Butalbital, CaffeineFiorinal
How Aspirin, Butalbital, Caffeine interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Butalbital, Caffeine interactionAspirin, Butalbital, Caffeine, Codeine PhosphateFiorinal w/ Codeine
How Aspirin, Butalbital, Caffeine, Codeine Phosphate interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Butalbital, Caffeine, Codeine Phosphate interactionAspirin, Butalbital, Caffeine, PhenacetinMarnal
How Aspirin, Butalbital, Caffeine, Phenacetin interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Butalbital, Caffeine, Phenacetin interactionAspirin, CaffeineAnacin
How Aspirin, Caffeine interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine interactionAspirin, Caffeine, Codeine PhosphateAnacin w/ Codeine
How Aspirin, Caffeine, Codeine Phosphate interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine, Codeine Phosphate interactionAspirin, Caffeine, Dihydrocodeine BitartrateSynalgos DC
How Aspirin, Caffeine, Dihydrocodeine Bitartrate interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine, Dihydrocodeine Bitartrate interactionAspirin, Caffeine, Dover's PwdAcedoval, Dovacet
How Aspirin, Caffeine, Dover's Pwd interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine, Dover's Pwd interactionAspirin, Caffeine, HydrocodoneDamason-P
How Aspirin, Caffeine, Hydrocodone interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine, Hydrocodone interactionAspirin, Caffeine, Isobutylallylbarbituric Acid, PhenacetinLanorinal
How Aspirin, Caffeine, Isobutylallylbarbituric Acid, Phenacetin interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine, Isobutylallylbarbituric Acid, Phenacetin interactionAspirin, Caffeine, Phenacetin, PropoxypheneMargesic Comp. 65
How Aspirin, Caffeine, Phenacetin, Propoxyphene interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Caffeine, Phenacetin, Propoxyphene interactionAspirin, Carisoprodol, Codeine PhosphateSoma Compound w/ Codeine
How Aspirin, Carisoprodol, Codeine Phosphate interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Carisoprodol, Codeine Phosphate interactionAspirin, Chlorpheniramine, PhenylpropanolamineAlka-Seltzer Plus Cold
How Aspirin, Chlorpheniramine, Phenylpropanolamine interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Chlorpheniramine, Phenylpropanolamine interactionAspirin, Codeine PhosphateAspirin w/ Codeine
How Aspirin, Codeine Phosphate interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Codeine Phosphate interactionAspirin, Codeine Phosphate, PhenobarbitalPhenaphen
How Aspirin, Codeine Phosphate, Phenobarbital interacts with Tri-Mag 300 — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Aspirin, Codeine Phosphate, Phenobarbital interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Tri-Mag 300 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 Tri-Mag 300, from the product label.
DaVinci Laboratories
See all DaVinci Laboratories products- Name
- DaVinci Laboratories a division of FoodScience LLC
- Street Address
- 929 Harvest Lane
- City
- Williston
- State
- VT
- ZipCode
- 05495
- Phone Number
- 1-800-325-1776
- Web Address
- www.davincilabs.com
Tri-Mag 300 by DaVinci Laboratories: Common Questions
Does Tri-Mag 300 by DaVinci Laboratories interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Will this magnesium interact with my blood pressure medication?
Can I take this if I'm taking antibiotics?
Is magnesium safe to use while I'm pregnant?
Can I take this with my diabetes medication?
Will this help my constipation?
What side effects should I watch for?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Tri-Mag 300 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 Tri-Mag 300’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Tri-Mag 300'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..
- Pfaffenrath V, Wessely P, Meyer C, et al. Magnesium in the prophylaxis of migraine--a double-blind placebo-controlled study. Cephalalgia 1996;16:436-40.. PubMed
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