Glucosamine Sulfate 1,000 mg Ingredients & Drug Interactions
by Vitacost
What is this page for?
First and foremost: checking Glucosamine Sulfate 1,000 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
Glucosamine Sulfate 1,000 mg is a dietary supplement by Vitacost with 1 active ingredient. Its ingredients are commonly taken for osteoarthritis, joint pain and stiffness, cartilage support.Based on those ingredients, 170 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Glucosamine Sulfate 2 KCl. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Glucosamine Sulfate 1,000 mg by Vitacost
Ask about any prescription or over-the-counter medication and we check it for interactions with Glucosamine Sulfate 1,000 mg by Vitacost — 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 Glucosamine Sulfate 1,000 mg by Vitacost
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: glucosamine sulfate 2 KCl, 1,000 mg per capsule. Glucosamine is a compound your body makes naturally—it's part of cartilage and joint tissue, and it's used in supplements to support joint health.
The inactive ingredients are gelatin capsule, cellulose, stearic acid, and magnesium stearate (binders and fillers that hold the capsule together).
Does it work?
Strong evidence
Glucosamine sulfate is likely effective for osteoarthritis—that's the one condition where we have solid evidence backing it. For other uses listed here—aging skin, back pain, colorectal cancer prevention, and metabolic dysfunction-associated steatotic liver disease (a type of fatty liver)—the evidence isn't established well enough in our data to rate whether it works.
How safe is it?
Well-documented data
When taken by mouth, glucosamine sulfate is generally well tolerated by most adults. The most common mild side effects are bloating, constipation, cramps, diarrhea, heartburn, and nausea.
Rare serious effects have been reported, and there's also a concern about allergic reactions—one review found that 72% of glucosamine-related adverse events involved sensitivity reactions, ranging from mild (itching, rash) to severe (breathing trouble, low blood pressure), with anaphylaxis reported in 1.5% of cases. A few cases of asthma flare-ups tied to glucosamine-chondroitin products have also been reported.
There isn't enough safety information to recommend this product during pregnancy, so it's best to avoid it then. The same goes for breastfeeding—not enough is known, so talk with your doctor or pharmacist before using it if you're nursing.
Meds to double-check
Major interaction found
Before taking this product, check with your doctor or pharmacist if you're on blood thinners like warfarin—glucosamine can boost their effect and raise your bleeding risk significantly. Also flag it if you take topoisomerase II inhibitors (certain chemotherapy drugs), diabetes medications, or regular acetaminophen doses.
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.
Glucosamine sulfate is likely effective for osteoarthritis and is generally well tolerated when taken by mouth. If you take blood thinners (especially warfarin), cancer chemotherapy drugs, diabetes medications, or regular acetaminophen, you need to check with your doctor or pharmacist before starting this—the interactions may matter for your situation.
Avoid it during pregnancy and breastfeeding unless your doctor advises otherwise.
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 May 22, 2015.
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 Glucosamine Sulfate 1,000 mg, straight from the product label.
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 Glucosamine Sulfate 1,000 mg by Vitacost, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Glucosamine Sulfate 2 KCl | 1000 mg | -- |
Other ingredients: Gelatin Capsule, Cellulose, Stearic Acid, Magnesium Stearate
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.
Formula
Contains: Shellfish (shrimp, crab).
Precautions
Contains: Shellfish (shrimp, crab).
Warnings Pregnant or lactating women, diabetics, hypoglycemics, and people with known medical conditions and/or taking drugs should consult with a licensed physician and/or pharmacist prior to taking dietary supplements.
General Statements
Natural support for healthy joint and cartilage function.
What is Vitacost Glucosamine Sulfate?
Glucosamine is a naturally occurring amino-sugar synthesized in the body through a process that includes glutamine and sugar. It's a constituent of glycosaminoglycan (GAG) chains, which are important for healthy cartilage and joints. Glycosaminoglycans are important for the production and maintenance of most connective tissues and lubricating fluids throughout the body.
FDA Statement of Identity
DIETARY SUPPLEMENT
Suggested/Recommended/Usage/Directions
Vitacost Glucosamine Sulfate Directions As a dietary supplement, take 1 capsule daily or as directed by a physician. Best results are obtained with long-term use (more than three months).
Storage
Store in a cool, dry place.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Glucosamine Sulfate 1,000 mg by Vitacost 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 Glucosamine Sulfate 1,000 mg by Vitacost
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container240 Amounts shown are per serving.
Glucosamine Sulfate 2 KCl
Interacts with170 drugs
Glucosamine is a natural compound found in cartilage and joint fluid, and it is one of the most popular supplements for osteoarthritis, especially of...
Glucosamine Sulfate 2 KCl monograph & interactionsOther (inactive) ingredients: Gelatin Capsule, Cellulose, Stearic Acid, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
Glucosamine Sulfate 1,000 mg by Vitacost Drug Interactions
HelloPharmacist Interaction Report
Vitacost Glucosamine Sulfate 1,000 mg does interact with several medication types, and the most serious concern is with blood thinners like warfarin (Coumadin).
Glucosamine may increase warfarin's blood-thinning effects, raising your risk of bruising and bleeding—case reports show it can significantly raise INR (a measure of how thin your blood is) in patients who were previously stable on the drug.
Read the full breakdown — every affected drug type, severity by severity
You'll also want to flag this product with your doctor if you take cancer chemotherapy drugs called topoisomerase II inhibitors, such as etoposide or doxorubicin. Laboratory research suggests glucosamine might make these drugs less effective by reducing their ability to stop tumor cells from dividing, though this hasn't been seen in actual patients yet.
Altogether, these interactions span 170 individual medications.
Glucosamine has a minor interaction documented with diabetes medications and with acetaminophen (Tylenol). For diabetes drugs, concerns about reduced insulin effectiveness have been raised in lab and animal studies, but in practice it's unlikely to be a real problem.
With acetaminophen, some people report less pain relief when they use both together, possibly because acetaminophen interferes with how the sulfate portion of glucosamine works.
Before you start this product, check with your doctor or pharmacist if you're on any blood thinners, chemotherapy, diabetes medications, or regular acetaminophen use. We can help you search your exact medications using the tool on this page.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Glucosamine Sulfate 1,000 mg?
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 Glucosamine Sulfate 1,000 mg interact with 170 drugs. Click any drug to see the details.
1 of the 1 ingredient in Glucosamine Sulfate 1,000 mg interact with drugs. Each result below shows which ingredient is responsible. Glucosamine Sulfate 2 KCl
WarfarinWarfarin
How Warfarin interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclWarfarin (coumadin) Major
Interaction Summary
Glucosamine might increase the anticoagulant effects of warfarin and increase the risk of bruising and bleeding.
Read the full Glucosamine Sulfate 2 Kcl + Warfarin interactionWarfarin SodiumCoumadin, Panwarfin, Sofarin
How Warfarin Sodium interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclWarfarin (coumadin) Major
Interaction Summary
Glucosamine might increase the anticoagulant effects of warfarin and increase the risk of bruising and bleeding.
Read the full Glucosamine Sulfate 2 Kcl + Warfarin Sodium interactionDaunorubicin CitrateDaunoXome
How Daunorubicin Citrate interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Daunorubicin Citrate interactionDaunorubicin HydrochlorideCerubidine
How Daunorubicin Hydrochloride interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Daunorubicin Hydrochloride interactionDaunorubicin, CytarabineVyxeos
How Daunorubicin, Cytarabine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Daunorubicin, Cytarabine interactionDoxorubicinAdriamycin, Caelyx, Doxil, Myocet, Rubex
How Doxorubicin interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Doxorubicin interactionEpirubicinEllence
How Epirubicin interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Epirubicin interactionEtoposideEtopophos, VePesid, VP16
How Etoposide interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Etoposide interactionIdarubicinIdamycin
How Idarubicin interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Idarubicin interactionIrinotecanCamptosar, Onivyde
How Irinotecan interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Irinotecan interactionIrinotecan Hydrochloride
How Irinotecan Hydrochloride interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Irinotecan Hydrochloride interactionMitoxantroneNovantrone
How Mitoxantrone interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Mitoxantrone interactionTeniposideVumon
How Teniposide interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Teniposide interactionTopotecanHycamtin
How Topotecan interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Topotecan interactionValrubicinValstar
How Valrubicin interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine Sulfate 2 Kcl + Valrubicin interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAntidiabetes Drugs Minor
Interaction Summary
Despite initial concerns, it is unlikely that glucosamine will interfere with the effects of antidiabetes drugs.
Read the full Glucosamine Sulfate 2 Kcl + Acarbose interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Glucosamine Sulfate 1,000 mg — through 1 ingredient. Tap an ingredient for the detail:
Glucosamine Sulfate 2 KclAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine Sulfate 2 Kcl + Acetaminophen, Caffeine, Isometheptene interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Glucosamine Sulfate 1,000 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.
Glucosamine Sulfate 2 KCl
Warfarin (Coumadin)
Glucosamine might increase the anticoagulant effects of warfarin and increase the risk of bruising and bleeding.
In two individual case reports, glucosamine/chondroitin combinations were associated with a significant increase in international normalized ratio (INR) in patients previously stabilized on warfarin. In one case, the increase in INR occurred only after tripling the dose of a glucosamine/chondroitin supplement from 500 mg/400 mg daily to 1500/1200 mg daily. Additionally, 20 voluntary case reports to the U.S. Food & Drug Administration (FDA) have linked glucosamine plus chondroitin with increased INR, bruising, and bleeding in patients who were also taking warfarin. There have also been 20 additional case reports to the World Health Organization (WHO) that link glucosamine alone to increased INR in patients taking warfarin. The mechanism of this interaction is unclear. Glucosamine is a small component of heparin, but is not thought to have anticoagulant activity; however, animal research suggests that it might have antiplatelet activity.
Topoisomerase Ii Inhibitors
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
In vitro research suggests that glucosamine might induce resistance to etoposide (VP16, VePesid) and doxorubicin (Adriamycin) by reducing inhibition of topoisomerase II, an enzyme required for DNA replication in tumor cells. This effect has not been reported in humans.
Acetaminophen (Tylenol, Others)
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Anecdotal reports suggest that adding glucosamine to an acetaminophen regimen might decrease pain control in patients with osteoarthritis. Some research suggests that the sulfate portion of glucosamine sulfate might contribute to its effect in osteoarthritis. Since acetaminophen metabolism requires sulfur and reduces serum sulfate concentrations, acetaminophen could theoretically interfere with the action of glucosamine sulfate. Conversely, the administration of sulfate could theoretically decrease the effectiveness of acetaminophen in sulfate-deficient people by increasing its clearance.
Antidiabetes Drugs
Despite initial concerns, it is unlikely that glucosamine will interfere with the effects of antidiabetes drugs.
In vitro and animal research has suggested that glucosamine might increase insulin resistance or decrease insulin production. This has raised concerns that taking glucosamine might worsen diabetes and decrease the effectiveness of diabetes drugs. However, clinical research suggests that glucosamine does not have adverse effects on blood glucose or glycated hemoglobin (HbA1C) in healthy, obese, or type 2 diabetes patients.
Brand information
Manufacturer and brand details for Glucosamine Sulfate 1,000 mg, from the product label.
Glucosamine Sulfate 1,000 mg by Vitacost: Common Questions
Does Glucosamine Sulfate 1,000 mg by Vitacost interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Does glucosamine sulfate actually work for joint pain?
What are the most common side effects?
Can I take this during pregnancy?
Can I take this while breastfeeding?
Can I take this with acetaminophen (Tylenol)?
Is this product safe if I have diabetes?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Glucosamine Sulfate 1,000 mg 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 Glucosamine Sulfate 1,000 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Glucosamine Sulfate 1,000 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 58 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.
Glucosamine 58 references
- Adams ME. Hype about glucosamine. Lancet 1999;354:353-4. PubMed
- Balkan B, Dunning BE. Glucosamine inhibits glucokinase in vitro and produces a glucose-specific impairment of in vivo insulin secretion in rats. Diabetes 1994;43:1173-9. PubMed
- Giaccari A, Morviducci L, Zorretta D, et al. In vivo effects of glucosamine on insulin secretion and insulin sensitivity in the rat: possible relevance to the maladaptive responses to chronic hyperglycaemia. Diabetologia 1995;38:518-24. PubMed
- Holmang A, Nilsson C, Niklasson M, et al. Induction of insulin resistance by glucosamine reduces blood flow but not interstitial levels of either glucose or insulin. Diabetes 1999;48:106-11. PubMed
- Houpt JB, McMillan R, Wein C, Paget-Dellio SD. Effect of glucosamine hydrochloride in the treatment of pain of osteoarthritis of the knee. J Rheumatol 1999;26:2423-30.
- Barclay TS, Tsourounis C, McCart GM. Glucosamine. Ann Pharmacother 1998;32:574-9.
- Shankar RR, Zhu JS, Baron AD. Glucosamine infusion in rats mimics the beta-cell dysfunction of non-insulin-dependent diabetes mellitus. Metabolism 1998;47:573-7.
- Almada A, Harvey P, Platt K. Effects of chronic oral glucosamine sulfate on fasting insulin resistance index (FIRI) in non-diabetic individuals. FASEB J 2000;14:A750.
- Reginster JY, Deroisy R, Rovati LC, et al. Long-term effects of glucosamine sulfate on osteoarthritis progression: a randomised, placebo-controlled trial. Lancet 2001;357:251-6.
- Does glucosamine increase serum lipid levels and blood pressure? Pharmacist's Letter/Prescriber's Letter 2001;17(11):171115.
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
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