Premier Calcium Magnesium Plus Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Premier Calcium Magnesium Plus 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
Premier Calcium Magnesium Plus is a dietary supplement by Premier Research Labs with 6 active ingredients. Its ingredients are commonly taken for bone health and osteoporosis prevention, dietary calcium deficiency, heartburn relief (calcium carbonate antacids).Based on those ingredients, 649 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Reishi extract, Lion's Mane extract, Magnesium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Premier Calcium Magnesium Plus by Premier Research Labs
Ask about any prescription or over-the-counter medication and we check it for interactions with Premier Calcium Magnesium Plus by Premier Research Labs — 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 Premier Calcium Magnesium Plus by Premier Research Labs
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
Partial disclosure
This product contains 6 active ingredients. Calcium and magnesium are the mineral foundations—calcium supports bone health and is used to treat low blood calcium and certain kidney and digestive conditions, while magnesium is involved in hundreds of body processes including muscle and nerve function and blood sugar regulation.
The product also includes reishi extract (from a medicinal mushroom), lion's mane extract (another medicinal mushroom), organic turkey tails, and pH MinUltra (a coral-derived calcium source). The capsules themselves and jasmine rice bran are inactive ingredients that help deliver the actives.
Does it work?
Strong evidence
Calcium in this product is effective for treating low blood calcium (hypocalcemia), kidney failure-related issues, high potassium levels (hyperkalemia), and heartburn (dyspepsia), and is likely effective for osteoporosis. Magnesium is effective for low magnesium (hypomagnesemia), dyspepsia, constipation, and preventing pre-eclampsia in pregnancy. pH MinUltra (coral) is likely effective as a bone substitute in surgical settings.
Reishi and lion's mane extracts have not been established as effective for any condition in the evidence we hold—ratings for them range from insufficient evidence to possibly ineffective (reishi for cholesterol levels). The evidence on turkey tails and coriolus TriBlend's benefits is not on file for this product.
How safe is it?
Well-documented data
Calcium is generally well tolerated at recommended doses, though high amounts can cause problems including constipation, diarrhea, stomach upset, and rarely kidney stones or calciphylaxis. Very high dietary calcium (over 2000 mg daily) has raised some concerns about prostate cancer risk in observational studies, and some research suggests increased heart disease risk at high intakes, though these findings remain debated.
Adequate calcium is safe in pregnancy and breastfeeding when you stay within recommended amounts. Magnesium is generally well tolerated and causes diarrhea, nausea, or stomach upset in some people; rarely it can form indigestible masses in the stomach.
It is needed in pregnancy but supplements should be used only under a doctor's guidance. Reishi is generally well tolerated short-term and can cause dizziness, dry mouth, nausea, or rash, but long-term safety is not well studied—it should be avoided in pregnancy and breastfeeding.
Lion's mane is generally well tolerated as a food but supplement safety long-term is unclear, and it should be avoided in pregnancy and breastfeeding. pH MinUltra (coral) raises quality and contamination concerns; safety in pregnancy and breastfeeding is not well studied.
Meds to double-check
Major interaction found
Check before taking if you use HIV integrase inhibitors (dolutegravir, elvitegravir), the antibiotic ceftriaxone, levothyroxine (thyroid), blood thinners or antiplatelet drugs, diabetes medications, blood pressure drugs, heart medications like diltiazem, Parkinson's medications (levodopa/carbidopa), bisphosphonates, quinolone antibiotics, muscle relaxants, or immunosuppressants. No interactions are documented for the turkey tails ingredient we could check.
The bottom line
Scorecard at a glancePartially disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
This product may help if you need supplemental calcium and magnesium for bone health or certain medical conditions. However, if you take HIV medications, antibiotics, thyroid drugs, blood thinners, diabetes treatments, or blood pressure medications, you'll need to check your exact prescriptions before starting—the calcium and magnesium can interfere with how these work.
Talk with your doctor or pharmacist before adding this supplement, especially if you're pregnant, breastfeeding, or managing a chronic condition.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 5 of 6 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 16, 2022.
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 Premier Calcium Magnesium Plus, straight from the product label.
| Brand | Premier Research Labs |
|---|---|
| Barcode (UPC) | 807735055004 |
| Net contents | 300 Plant-Source Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jun 16, 2022 |
| DSLD ID | 269248 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Kosher |
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 Premier Calcium Magnesium Plus by Premier Research Labs, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Calcium | 360 mg | 28% |
| organic Turkey Tails | 0 NP | -- |
| Magnesium | 180 mg | 43% |
| Reishi extract | 0 NP | -- |
| Lion's Mane extract | 0 NP | -- |
| pH MinUltra | 1.5 Gram(s) | -- |
| Coriolus TriBlend | 96 mg | -- |
Other ingredients: Jasmine Rice Bran, Plant-Source Capsules
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.
Suggested/Recommended/Usage/Directions
Suggested use: Take 3 capsules, once daily or as directed by a health professional.
Formulation
Legendary mineral support for the bones, joints, teeth and an optimal alkaline pH
Premier minerals for whole body support
PRL's quality guarantee Purity verified Potency verified Tested for adulterants Pathogen microbiology performed Heavy metal tested FDA-monitored cGMP facility
Non-GMO No added magnesium stearate No chemical or radiation sterilization
PRL's quality program. Manufactured to avoid: added magnesium stearate (an undesirable excipient), artificial colors, artificial flavors or artificial preservatives.
Formula
Features easy-to-absorb, premier quality calcium and magnesium with an impressive 2:1 ratio
Premier calcium magnesium plus with coriolus triblend
OU (Kosher)
Precautions
Tamper seal: Use only if seal is intact.
Consult your health care practitioner if you are pregnant/nursing, taking medications or have a medical condition, before taking this or any other product.
Keep out of reach of children.
Storage
Store in a cool, dry place.
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
Dietary Supplement
Seals/Symbols
OU (Kosher)
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Premier Calcium Magnesium Plus by Premier Research Labs 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 Premier Calcium Magnesium Plus by Premier Research Labs
These are the 6 active ingredients this product is made of. Select any to open its full monograph.
Serving size3 Capsule(s) Dosage formCapsule Servings per container100 Amounts shown are per serving.
Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.
Calcium
Interacts with168 drugs
Calcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet f...
Calcium monograph & interactionsMagnesium
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 & interactionsPH MinUltra
No knowninteractions
Coral calcium is a calcium supplement made from coral skeletons (often fossilized) that also contains small amounts of other minerals. It is essential...
PH MinUltra monograph & interactionsCoriolus TriBlend
- › Organic Turkey Tails
- › Reishi extract
- › Lion's Mane extract
Other (inactive) ingredients: Jasmine Rice Bran, Plant-Source Capsules. These complete the product’s ingredient list but are not active constituents.
Premier Calcium Magnesium Plus by Premier Research Labs Drug Interactions
HelloPharmacist Interaction Report
Premier Calcium Magnesium Plus has documented interactions with medications through its calcium, magnesium, reishi extract, and lion's mane extract.
The most serious interactions involve calcium with HIV integrase inhibitors (dolutegravir and elvitegravir) and the antibiotic ceftriaxone—calcium can significantly reduce blood levels of these HIV drugs or cause dangerous precipitation in the lungs and kidneys if given intravenously.
Read the full breakdown — every affected drug type, severity by severity
Calcium also interacts with levothyroxine (a thyroid medication), sotalol (a heart rhythm drug), the psoriasis treatment calcipotriene, and diltiazem (a blood pressure medication), reducing their absorption or effectiveness. Magnesium reduces absorption of the Parkinson's medication levodopa/carbidopa and decreases effectiveness of quinolone antibiotics, bisphosphonates (bone drugs), and sulfonylureas (diabetes medications); it can also enhance skeletal muscle relaxants and blood pressure-lowering drugs.
Reishi and lion's mane extracts may theoretically increase bleeding risk with blood thinners, have additive effects with diabetes or blood pressure drugs, and lion's mane may interfere with immunosuppressant medications.
Organic turkey tails and coriolus TriBlend are ingredients we could not fully check for interactions. Altogether, these interactions span 649 individual medications.
Use the medication checker on this page to confirm your exact drugs before starting, and talk with your doctor or pharmacist if you take any HIV medications, antibiotics, thyroid drugs, heart or blood pressure medications, or diabetes treatments.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Premier Calcium Magnesium Plus?
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 Premier Calcium Magnesium Plus interact with 649 drugs. Click any drug to see the details.
4 of the 6 ingredients in Premier Calcium Magnesium Plus interact with drugs. Each result below shows which ingredient is responsible. Reishi extract Lion's Mane extract Magnesium Calcium
Benserazide, LevodopaMadopar, Prolopa
How Benserazide, Levodopa interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magnesium + Benserazide, Levodopa interactionCarbidopaLodosyn
How Carbidopa interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magnesium + Carbidopa interactionCarbidopa, LevodopaDhivy, Rytary, Sinemet, Sinemet CR
How Carbidopa, Levodopa interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magnesium + Carbidopa, Levodopa interactionCarbidopa, Levodopa, EntacaponeStalevo
How Carbidopa, Levodopa, Entacapone interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magnesium + Carbidopa, Levodopa, Entacapone interactionCeftriaxoneRocephin
How Ceftriaxone interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
CalciumCeftriaxone (rocephin) Major
Interaction Summary
Co-administration of intravenous calcium and ceftriaxone can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys.
Read the full Calcium + Ceftriaxone interactionCobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide FumarateGenvoya
How Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interacts with Premier Calcium Magnesium Plus — through 2 ingredients. Tap an ingredient for the detail:
CalciumElvitegravir (vitekta), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Calcium + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionMagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionDolutegravirTivicay
How Dolutegravir interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
CalciumDolutegravir (tivicay) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Calcium + Dolutegravir interactionDolutegravir, Emtricitabine, Tenofovir AlafenamideDolutegravir, Emtricitabine, Tenofovir Alafenamide
How Dolutegravir, Emtricitabine, Tenofovir Alafenamide interacts with Premier Calcium Magnesium Plus — through 2 ingredients. Tap an ingredient for the detail:
CalciumDolutegravir (tivicay), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Calcium + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionMagnesiumBictegravir/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 interactionDolutegravir, RilpivirineJuluca
How Dolutegravir, Rilpivirine interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
CalciumDolutegravir (tivicay) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Calcium + Dolutegravir, Rilpivirine interactionElvitegravirVitekta
How Elvitegravir interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
CalciumElvitegravir (vitekta) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Calcium + Elvitegravir interactionElvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil FumarateStribild
How Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interacts with Premier Calcium Magnesium Plus — through 2 ingredients. Tap an ingredient for the detail:
CalciumElvitegravir (vitekta), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Calcium + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interactionMagnesiumBictegravir/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 interactionLevodopaInbrija, Larodopa
How Levodopa interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magnesium + Levodopa interactionLevodopa, CarbidopaDuodopa
How Levodopa, Carbidopa interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumLevodopa/carbidopa (sinemet) Major
Interaction Summary
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Read the full Magnesium + Levodopa, Carbidopa interaction6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
Lion's Mane ExtractImmunosuppressants Moderate
Interaction Summary
Theoretically, concurrent use of lion's mane mushroom might interfere with immunosuppressive therapy.
Read the full Lion's Mane Extract + 6-mercaptopurine interactionAbciximabReoPro
How Abciximab interacts with Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Lion's Mane ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Abciximab interactionReishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Abciximab interactionMagnesiumAnticoagulant/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 Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Lion's Mane ExtractAnticoagulant/antiplatelet Drugs, Immunosuppressants Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Abrocitinib interactionReishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Abrocitinib interactionMagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Premier Calcium Magnesium Plus — through 2 ingredients. Tap an ingredient for the detail:
Lion's Mane ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may have additive effects when used with antidiabetes drugs.
Read the full Lion's Mane Extract + Acarbose interactionReishi ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, reishi mushroom might have additive effects with antidiabetes drugs.
Read the full Reishi Extract + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
Reishi ExtractAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, concurrent use of reishi mushroom with antihypertensive drugs might increase the risk of hypotension.
Read the full Reishi Extract + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Reishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Acenocoumarol interactionLion's Mane ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Acenocoumarol interactionMagnesiumAnticoagulant/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 Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Lion's Mane ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Acetaminophen, Aspirin interactionReishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Acetaminophen, Aspirin interactionMagnesiumAnticoagulant/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 Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Reishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Acetaminophen, Aspirin, Caffeine interactionLion's Mane ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Acetaminophen, Aspirin, Caffeine interactionMagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, ChlorzoxazoneAcetazone Forte, Extra Strength Tylenol Aches & Strains, Parafon Forte
How Acetaminophen, Chlorzoxazone interacts with Premier Calcium Magnesium Plus — 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 + Acetaminophen, Chlorzoxazone interactionAcetaminophen, Chlorzoxazone, CodeineAcetazone Forte C8, Parafon Forte C8
How Acetaminophen, Chlorzoxazone, Codeine interacts with Premier Calcium Magnesium Plus — 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 + Acetaminophen, Chlorzoxazone, Codeine interactionAcetaminophen, Codeine, MethocarbamolAcetaminophen, Codeine, Methocarbamol, Robaxacet 8
How Acetaminophen, Codeine, Methocarbamol interacts with Premier Calcium Magnesium Plus — 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 + Acetaminophen, Codeine, Methocarbamol interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Reishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Acetaminophen, Ibuprofen interactionLion's Mane ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Acetaminophen, Ibuprofen interactionMagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetaminophen, Ibuprofen interactionAcetaminophen, MethocarbamolRobaxacet
How Acetaminophen, Methocarbamol interacts with Premier Calcium Magnesium Plus — 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 + Acetaminophen, Methocarbamol interactionAcetaminophen, OrphenadrineOrfenagesic
How Acetaminophen, Orphenadrine interacts with Premier Calcium Magnesium Plus — 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 + Acetaminophen, Orphenadrine interactionAcetazolamideAk-Zol, Diamox
How Acetazolamide interacts with Premier Calcium Magnesium Plus — through 1 ingredient. Tap an ingredient for the detail:
Reishi ExtractAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, concurrent use of reishi mushroom with antihypertensive drugs might increase the risk of hypotension.
Read the full Reishi Extract + Acetazolamide interactionAcetohexamideDymelor
How Acetohexamide interacts with Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Reishi ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, reishi mushroom might have additive effects with antidiabetes drugs.
Read the full Reishi Extract + Acetohexamide interactionLion's Mane ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may have additive effects when used with antidiabetes drugs.
Read the full Lion's Mane Extract + Acetohexamide interactionMagnesiumSulfonylureas Moderate
Interaction Summary
Magnesium increases the systemic absorption of sulfonylureas, increasing their effects and side effects.
Read the full Magnesium + Acetohexamide interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with Premier Calcium Magnesium Plus — through 3 ingredients. Tap an ingredient for the detail:
Lion's Mane ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
Read the full Lion's Mane Extract + Acetylsalicylic Acid interactionReishi ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
Read the full Reishi Extract + Acetylsalicylic Acid interactionMagnesiumAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
Read the full Magnesium + Acetylsalicylic Acid interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Premier Calcium Magnesium Plus with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.
Reishi extract
Anticoagulant/Antiplatelet Drugs
Theoretically, high doses of reishi mushroom might increase the risk of bleeding.
A dose of 1.5 grams daily of reishi mushroom does not seem to decrease platelet aggregation, but a higher dose of 3 grams daily does.
Antidiabetes Drugs
Theoretically, reishi mushroom might have additive effects with antidiabetes drugs.
Animal research suggests that reishi mushroom decreases blood sugar. However, in patients with type 2 diabetes, taking reishi mushroom does not reduce fasting glucose levels, and its effects on glycated hemoglobin are inconsistent.
Antihypertensive Drugs
Theoretically, concurrent use of reishi mushroom with antihypertensive drugs might increase the risk of hypotension.
Reishi mushroom has shown hypotensive activity in animal research. Clinical evidence suggests that reishi mushroom reduces blood pressure in some, but not all, patients with hypertension.
Lion's Mane extract
Anticoagulant/Antiplatelet Drugs
Theoretically, lion's mane mushroom may increase the risk of bleeding when used with anticoagulant/antiplatelet drugs.
In vitro research suggests that lion's mane mushroom extracts can inhibit platelet aggregation.
Antidiabetes Drugs
Theoretically, lion's mane mushroom may have additive effects when used with antidiabetes drugs.
Animal research suggests that an aqueous extract of lion's mane mushroom can reduce serum glucose and increase serum insulin.
Immunosuppressants
Theoretically, concurrent use of lion's mane mushroom might interfere with immunosuppressive therapy.
In animal and in vitro research, lion's mane mushroom polysaccharides stimulate the immune system.
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.
Calcium
Ceftriaxone (Rocephin)
Co-administration of intravenous calcium and ceftriaxone can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys.
Avoid administering intravenous calcium in any form, such as parenteral nutrition or Lactated Ringers, within 48 hours of intravenous ceftriaxone. Case reports in neonates show that administering intravenous ceftriaxone and calcium can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys. In several cases, neonates have died as a result of this interaction. So far there are no reports in adults; however, there is still concern that this interaction might occur in adults.
Dolutegravir (Tivicay)
Calcium seems to reduce levels of dolutegravir.
Advise patients to take dolutegravir either 2 hours before or 6 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium carbonate 1200 mg concomitantly with dolutegravir 50 mg reduces plasma levels of dolutegravir by almost 40%. Calcium appears to decrease levels of dolutegravir through chelation.
Elvitegravir (Vitekta)
Calcium seems to reduce levels of elvitegravir.
Advise patients to take elvitegravir either 2 hours before or 2 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium along with elvitegravir can reduce blood levels of elvitegravir through chelation.
Aluminum
Calcium citrate might increase aluminum absorption and toxicity. Other types of calcium do not increase aluminum absorption.
Calcium citrate can increase the absorption of aluminum when taken with aluminum hydroxide. The increase in aluminum levels may become toxic, particularly in individuals with kidney disease. However, the effect of calcium citrate on aluminum absorption is due to the citrate anion rather than calcium cation. Calcium acetate does not appear to increase aluminum absorption.
Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)
Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide and calcium can be taken together if taken with food. However, if taken on an empty stomach, bictegravir/emtricitabine/tenofovir alafenamide should not be taken with, or 2 hours after, calcium containing products.
Bisphosphonates
Calcium reduces the absorption of bisphosphonates.
Advise patients to take bisphosphonates at least 30 minutes before calcium, but preferably at a different time of day. Calcium supplements decrease absorption of bisphosphonates.
Calcipotriene (Dovonex)
Taking calcipotriene with calcium might increase the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with calcium supplements might increase the risk of hypercalcemia.
Digoxin (Lanoxin)
Using intravenous calcium with digoxin might increase the risk of fatal cardiac arrhythmias.
Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. However, one retrospective analysis of clinical data suggests that intravenous calcium does not increase the risk of dysrhythmias or mortality in patients receiving digoxin.
Diltiazem (Cardizem, Others)
Theoretically, calcium may reduce the therapeutic effects of diltiazem.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, calcium might increase this risk of hypercalcemia and reduce the effectiveness of diltiazem.
Levothyroxine (Synthroid, Others)
Calcium seems to reduce the absorption and effectiveness of levothyroxine.
Advise patients to take levothyroxine and calcium supplements at least 4 hours apart. Calcium reduces levothyroxine absorption, probably by forming insoluble complexes. Calcium carbonate supplements reduce effectiveness of levothyroxine in patients with hypothyroidism.
Lithium
Theoretically, concomitant use of calcium and lithium may increase this risk of hypercalcemia.
Clinical research suggests that long-term use of lithium may cause hypercalcemia in 10% to 60% of patients. Theoretically, concomitant use of lithium and calcium supplements may further increase this risk.
Quinolone Antibiotics
Calcium seems to reduce the absorption of quinolone antibiotics.
Advise patients to take oral quinolones at least 2 hours before or 4-6 hours after calcium supplements or calcium-fortified foods. Taking calcium at the same time as oral quinolones can reduce quinolone absorption. Calcium binds to quinolones in the gut.
Raltegravir (Isentress)
Calcium may reduce levels of raltegravir.
Pharmacokinetic research shows that taking a single dose of calcium carbonate 3000 mg along with raltegravir 400 mg twice daily modestly decreases the mean area under the curve of raltegravir, but the decrease does not necessitate a dose adjustment of raltegravir. However, a case of elevated HIV-1 RNA levels and documented resistance to raltegravir has been reported for a patient taking calcium carbonate 1 gram three times daily plus vitamin D3 (cholecalciferol) 400 IU three times daily in combination with raltegravir 400 mg twice daily for 11 months. It is thought that calcium reduced raltegravir levels by chelation, leading to treatment failure.
Sotalol (Betapace)
Calcium seems to reduce the absorption of sotalol.
Advise patients to separate doses by at least 2 hours before or 4-6 hours after calcium. Calcium appears to reduce the absorption of sotalol, probably by forming insoluble complexes.
Tetracycline Antibiotics
Calcium seems to reduce the absorption of tetracycline antibiotics.
Advise patients to take oral tetracyclines at least 2 hours before, or 4-6 hours after calcium supplements. Taking calcium at the same time as oral tetracyclines can reduce tetracycline absorption. Calcium binds to tetracyclines in the gut.
Thiazide Diuretics
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Thiazides reduce calcium excretion by the kidneys. Using thiazides along with moderately large amounts of calcium carbonate increases the risk of milk-alkali syndrome (hypercalcemia, metabolic alkalosis, renal failure). Patients may need to have their serum calcium levels and/or parathyroid function monitored regularly.
Verapamil (Calan, Others)
Theoretically, calcium may reduce the therapeutic effects of verapamil.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, use of calcium supplements may increase this risk of hypercalcemia and reduce the effectiveness of verapamil.
Calcium Channel Blockers
Intravenous calcium may decrease the effects of calcium channel blockers; oral calcium is unlikely to have this effect.
Intravenous calcium is used to decrease the effects of calcium channel blockers in the management of overdose. Intravenous calcium gluconate has been used before intravenous verapamil (Isoptin) to prevent or reduce the hypotensive effects without affecting the antiarrhythmic effects. But there is no evidence that dietary or supplemental calcium when taken orally interacts with calcium channel blockers.
Brand information
Manufacturer and brand details for Premier Calcium Magnesium Plus, from the product label.
Premier Research Labs
See all Premier Research Labs products- Name
- Premier Research Labs, LP
- Street Address
- 3500-B Wadley Place
- City
- Austin
- State
- TX
- ZipCode
- 78728
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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The Full Monographs Behind Premier Calcium Magnesium Plus’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Calcium
Interacts with 168 drugsCalcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet falls short. Most people do best getting...
Read the full Calcium monograph → Herb & supplement monographMagnesium
Interacts with 295 drugsMagnesium is an essential mineral your body needs for muscles, nerves, blood pressure, and many other functions, and supplements are useful for preventing or correcting deficiency. Some othe...
Read the full Magnesium monograph → Herb & supplement monographCoral
Coral calcium is a calcium supplement made from coral skeletons (often fossilized) that also contains small amounts of other minerals. It is essentially a form of calcium carbonate, and ther...
Read the full Coral monograph → Herb & supplement monographReishi Mushroom
Interacts with 375 drugsReishi is a traditional Asian mushroom widely used to support the immune system and overall wellness. Human evidence for most of its claimed benefits is limited or low-quality, so it should...
Read the full Reishi Mushroom monograph → Herb & supplement monographLion's Mane Mushroom
Interacts with 327 drugsLion's mane is an edible mushroom that is popular as a 'nootropic' for memory, focus, and nerve health, but solid human evidence is still limited and early. It is generally well tolerated as...
Read the full Lion's Mane Mushroom monograph →Sources & How We Checked
Premier Calcium Magnesium Plus'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 172 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Calcium 62 references
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- Insentress [package insert]. Whitehouse Station, NJ: Merck Sharp & Dohme Corp.; 2014.
- Roberts JL, Kiser JJ, Hindman JT, Meditz AL. Virologic failure with a raltegravir-containing antiretroviral regimen and concomitant calcium administration. Pharmacotherapy 2011;31(10):298e-302e. DOI
- Vitekta [package insert]. Foster City, CA: Gilead Sciences, Inc.; 2014.
- Storan ER, O'Gorman SM, Murphy A, Laing M. Case Report of Calciphylaxis Secondary to Calcium and Vitamin D<sub>3</sub> Supplementation. J Cutan Med Surg. 2017;21(2):162-163. DOI
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Magnesium 82 references
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See these in context on the Lion's Mane Mushroom monograph →
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