Glucosamine Chondroitin Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Glucosamine Chondroitin 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 Chondroitin is a dietary supplement by Signature Supplements with 2 active ingredients. 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. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Glucosamine Chondroitin by Signature Supplements
Ask about any prescription or over-the-counter medication and we check it for interactions with Glucosamine Chondroitin by Signature Supplements — 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 Chondroitin by Signature Supplements
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 has 2 active ingredients: glucosamine and chondroitin. Both are compounds naturally found in cartilage and are used together in supplements meant to support joint health.
The capsules also contain inactive ingredients — cellulose and diatomaceous earth — which are fillers and binders that hold the product together.
Does it work?
Strong evidence
Glucosamine is rated likely effective for osteoarthritis, meaning there's solid evidence it may help with joint pain and function in that condition. For other uses listed — aging skin, back pain, cancer, and metabolic liver disease — the evidence we hold is insufficient to rate whether it works.
We have no effectiveness data on file for chondroitin.
How safe is it?
Well-documented data
Glucosamine is generally well tolerated by most adults when taken by mouth. The most common side effects are mild stomach issues: bloating, constipation, cramps, diarrhea, heartburn, and nausea.
Rarely, serious adverse effects have been reported. There's also a concern about allergic reactions — one review found that about three-quarters of adverse event reports involved hypersensitivity reactions, ranging from mild (itching, hives, lip swelling) to severe (difficulty breathing, dizziness, low blood pressure), with anaphylaxis reported in a small number of cases.
Cases of asthma flare-ups have been reported with glucosamine-chondroitin products. The safety data advises against this product during pregnancy.
For breastfeeding, there isn't enough information — talk with your doctor or pharmacist for personalized advice before using it.
Meds to double-check
Major interaction found
Before taking this product, double-check with your pharmacist if you take warfarin or other blood thinners — glucosamine may increase bleeding risk (Major severity). Also flag if you take topoisomerase II inhibitor cancer drugs like etoposide or doxorubicin (Moderate), antidiabetes medications (Minor), or regular acetaminophen (Minor).
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 Chondroitin may be worth considering if you have osteoarthritis and want to explore joint-support options. Be especially careful if you take warfarin or other blood thinners, cancer medications, diabetes drugs, or acetaminophen regularly — check with your pharmacist first.
If you have a history of allergic reactions or asthma, mention that too.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 22, 2025.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about Glucosamine Chondroitin, straight from the product label.
| Brand | Signature Supplements |
|---|---|
| Net contents | 100 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Aug 22, 2025 |
| DSLD ID | 338765 |
| Product type | Non-nutrient/non-botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for Glucosamine Chondroitin by Signature Supplements, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Chondroitin | 280 mg | -- |
| Glucosamine | 480 mg | -- |
Other ingredients: Cellulose, Diatomaceous Earth
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.
Formulation
No: chemical fillers or binders, artificial coloring, artificial flavor, preservatives, yeast, corn, milk, milk derivatives, lactose, salt, sodium, soy, sugar, gluten, starch or wheat.
From a GMP facility
Promotes joint flexibility
Precautions
Keep out of reach of children.
Do not take this product within 2 hours of taking medications or follow the advice of your health care providers. Warning: Pregnant or lactating women should consult a doctor before using any product. Consult doctor before use if you have, or have had, kidney disease, if you are on a magnesium-restricted diet or if you are taking any medications or remedies such as those to treat high blood pressure, heart medications, muscle relaxants or diuretics.
Discontinue use and consult your doctor if any adverse reactions occur, such as gastrointestinal discomfort or low blood pressure.
Warning: Do not consume product if you have an allergy to shellfish. Chondroitin contains shellfish
Not intended for use by persons under the age of 18
Storage
Store in a dry place and avoid excessive heat.
FDA Disclaimer Statement
This statement has 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
Suggested/Recommended/Usage/Directions
Directions: For adults, take one (1) to two (2) capsules daily, preferably with a meal.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Glucosamine Chondroitin by Signature Supplements 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 Chondroitin by Signature Supplements
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container50 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.
Chondroitin
Glucosamine
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 monograph & interactionsOther (inactive) ingredients: Cellulose, Diatomaceous Earth. These complete the product’s ingredient list but are not active constituents.
Glucosamine Chondroitin by Signature Supplements Drug Interactions
HelloPharmacist Interaction Report
Glucosamine Chondroitin by Signature Supplements does interact with some medications, and the most serious concern is with blood thinners.
Glucosamine may increase how strongly warfarin (Coumadin) works, raising your risk of bruising and bleeding. Two case reports documented significant increases in blood-clotting measures (INR) in patients who were stable on warfarin before adding a glucosamine/chondroitin combination.
Read the full breakdown — every affected drug type, severity by severity
Glucosamine also has documented interactions with cancer drugs called topoisomerase II inhibitors (such as etoposide and doxorubicin). Lab studies suggest it might reduce how well these drugs work, though this hasn't been confirmed in people yet.
This is rated Moderate severity.
There are Minor-level interactions with diabetes medications and acetaminophen (Tylenol). For diabetes drugs, the concern was theoretical — glucosamine was thought to worsen blood sugar control — but current evidence suggests this is unlikely to happen in practice.
Acetaminophen may slightly reduce pain relief when you're also taking glucosamine sulfate, according to some anecdotal reports.
We could not check chondroitin for interactions — we hold no data for that ingredient. Altogether, these interactions span 169 individual medications.
Use the medication checker on this page to look up your exact prescriptions before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Glucosamine Chondroitin?
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 Chondroitin interact with 170 drugs. Click any drug to see the details.
1 of the 2 ingredients in Glucosamine Chondroitin interact with drugs. Each result below shows which ingredient is responsible. Glucosamine
WarfarinWarfarin
How Warfarin interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineWarfarin (coumadin) Major
Interaction Summary
Glucosamine might increase the anticoagulant effects of warfarin and increase the risk of bruising and bleeding.
Read the full Glucosamine + Warfarin interactionWarfarin SodiumCoumadin, Panwarfin, Sofarin
How Warfarin Sodium interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineWarfarin (coumadin) Major
Interaction Summary
Glucosamine might increase the anticoagulant effects of warfarin and increase the risk of bruising and bleeding.
Read the full Glucosamine + Warfarin Sodium interactionDaunorubicin CitrateDaunoXome
How Daunorubicin Citrate interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Daunorubicin Citrate interactionDaunorubicin HydrochlorideCerubidine
How Daunorubicin Hydrochloride interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Daunorubicin Hydrochloride interactionDaunorubicin, CytarabineVyxeos
How Daunorubicin, Cytarabine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Daunorubicin, Cytarabine interactionDoxorubicinAdriamycin, Caelyx, Doxil, Myocet, Rubex
How Doxorubicin interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Doxorubicin interactionEpirubicinEllence
How Epirubicin interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Epirubicin interactionEtoposideEtopophos, VePesid, VP16
How Etoposide interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Etoposide interactionIdarubicinIdamycin
How Idarubicin interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Idarubicin interactionIrinotecanCamptosar, Onivyde
How Irinotecan interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Irinotecan interactionIrinotecan Hydrochloride
How Irinotecan Hydrochloride interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Irinotecan Hydrochloride interactionMitoxantroneNovantrone
How Mitoxantrone interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Mitoxantrone interactionTeniposideVumon
How Teniposide interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Teniposide interactionTopotecanHycamtin
How Topotecan interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Topotecan interactionValrubicinValstar
How Valrubicin interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineTopoisomerase Ii Inhibitors Moderate
Interaction Summary
Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
Read the full Glucosamine + Valrubicin interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAntidiabetes Drugs Minor
Interaction Summary
Despite initial concerns, it is unlikely that glucosamine will interfere with the effects of antidiabetes drugs.
Read the full Glucosamine + Acarbose interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + 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 Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Glucosamine Chondroitin — through 1 ingredient. Tap an ingredient for the detail:
GlucosamineAcetaminophen (tylenol, Others) Minor
Interaction Summary
Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Read the full Glucosamine + Acetaminophen, Caffeine, Isometheptene interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Glucosamine Chondroitin 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
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 Chondroitin, from the product label.
Signature Supplements
See all Signature Supplements products- Name
- Signature Supplements
- Street Address
- P.O. Box 1112
- City
- San Clemente
- State
- CA
- Web Address
- yoursignaturesupplements.com
Glucosamine Chondroitin by Signature Supplements: Common Questions
Does Glucosamine Chondroitin by Signature Supplements interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Is glucosamine safe to take while I'm pregnant?
Is it safe while breastfeeding?
What side effects should I expect?
Does this product actually work for joint pain?
Can I take this with my pain reliever?
What's chondroitin, and why is it in here with glucosamine?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Glucosamine Chondroitin 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 Chondroitin’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Glucosamine Chondroitin'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.
- Monauni T, Zenti MG, Cretti A, et al. Effects of glucosamine infusion on insulin secretion and insulin action in humans. Diabetes 2000;49:926-35. PubMed
- Pouwels MJ, Jacobs JR, Span PN, et al. Short-term glucosamine infusion does not affect insulin sensitivity in humans. J Clin Endocrinol Metab 2001;86:2099-103. DOI
- Yun J, Tomida A, Nagata K, Tsuruo T. Glucose-regulated stresses confer resistance to VP-16 in human cancer cells through a decreased expression of DNA topoisomerase II. Oncol Res 1995;7:583-90.
- Pavelka K, Gatterova J, Olejarova M, et al. Glucosamine sulfate use and delay of progression of knee osteoarthritis: A 3-year, randomized, placebo-controlled, double-blind study. Arch Intern Med 2002;162:2113-23. PubMed
- Tallia AF, Cardone DA. Asthma exacerbation associated with glucosamine-chondroitin supplement. J Am Board Fam Pract 2002;15:481-4..
- Scroggie DA, Albright A, Harris MD. The effect of glucosamine-chondroitin supplementation on glycosylated hemoglobin levels in patients with type 2 diabetes mellitus: a placebo-controlled, double-blinded, randomized clinical trial. Arch Intern Med 2003; PubMed
- Hoffer LJ, Kaplan LN, Hamadeh MJ, et al. Sulfate could mediate the therapeutic effect of glucosamine sulfate. Metabolism 2001;50:767-70.. PubMed
- Yu JG, Boies SM, Olefsky JM. The effect of oral glucosamine sulfate on insulin sensitivity in human subjects. Diabetes Care 2003;26:1941-2. PubMed
- Danao-Camara T. Potential side effects of treatment with glucosamine and chondroitin. Arthritis Rheum 2000;43:2853. PubMed
- Guillaume MP, Peretz A. Possible association between glucosamine treatment and renal toxicity: comment on the letter by Danao-Camara. Arthritis Rheum 2001;44:2943-4. PubMed
- Rozenfeld V, Crain JL, Callahan AK. Possible augmentation of warfarin effect by glucosamine-chondroitin. Am J Health Syst Pharm 2004;61:306-307. PubMed
- Tannis AJ, Barban J, Conquer JA. Effect of glucosamine supplementation on fasting and non-fasting plasma glucose and serum insulin concentrations in healthy individuals. Osteoarthritis Cartilage 2004;12:506-11. PubMed
- Bush TM, Rayburn KS, Holloway SW, et al. Adverse interactions between herbal and dietary substances and prescription medications: a clinical survey. Altern Ther Health Med 2007;13:30-5.
- Stumpf JL, Lin SW. Effect of glucosamine on glucose control. Ann Pharmacother 2006;40:694-8. PubMed
- Pham T, Cornea A, Blick KE, et al. Oral glucosamine in doses used to treat osteoarthritis worsens insulin resistance. Am J Med Sci 2007;333:333-9. PubMed
- Muniyappa R, Karne RJ, Hall G, et al. Oral glucosamine for 6 weeks at standard doses does not cause or worsen insulin resistance or endothelial dysfunction in lean or obese subjects. Diabetes 2006;55:3142-50. PubMed
- Knudsen J, Sokol GH. Potential glucosamine-warfarin interaction resulting in increased international normalized ratio: Case report and review of the literature and MedWatch database. Pharmacotherapy 2008;28:540-8. PubMed
- Yue QY, Strandell J, Myrberg O. Concomitant use of glucosamine potentiates the effect of warfarin. Jan 2006. Drug Safety 29(10):911-1010. DOI
- Rozendaal RM, Koes BW, van Osch GJVM, et al. Effect of glucosamine sulfate on hip osteoarthritis: A randomized trial. Ann Intern Med 2008;148:268-77. PubMed
- Baron AD, Zhu JS, Zhu JH, et al. Glucosamine induces insulin resistance in vivo by affecting GLUT 4 translocation in skeletal muscle. Implications for glucose toxicity. J Clin Invest 1995;96(6):2792-801. PubMed
- Nelson BA, Robinson KA, Buse MG. High glucose and glucosamine induce insulin resistance via different mechanisms in 3T3-L1 adipocytes. Diabetes 2000;49(6):981-91. PubMed
- Giordano N, Fioravanti A, Papakostas P, et al. The efficacy and tolerability of glucosamine sulfate in the treatment of knee osteoarthritis: a randomized, double-blind, placebo-controlled trial. Curr Ther Res Clin Exp 2009;70(3):185-196. PubMed
- Shaygannejad, V., Janghorbani, M., Savoj, M. R., and Ashtari, F. Effects of adjunct glucosamine sulfate on relapsing-remitting multiple sclerosis progression: preliminary findings of a randomized, placebo-controlled trial. Neurol Res 2010;32(9):981-985. PubMed
- Cahlin, B. J. and Dahlstrom, L. No effect of glucosamine sulfate on osteoarthritis in the temporomandibular joints--a randomized, controlled, short-term study. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011;112(6):760-766. PubMed
- Cerda C, Bruguera M, Parés A. Hepatotoxicity associated with glucosamine and chondroitin sulfate in patients with chronic liver disease. World J Gastroenterol 2013;19(32):5381-4. PubMed
- Hochberg MC, Martel-Pelletier J, Monfort J, Möller I, Castillo JR, Arden N,Berenbaum F, Blanco FJ, Conaghan PG, Doménech G, Henrotin Y, Pap T, Richette P, Sawitzke A, du Souich P, Pelletier JP; on behalf of the MOVES Investigation Group. Combined chondroi
- von Felden J, Montani M, Kessebohm K, Stickel F. Drug-induced acute liver injury mimicking autoimmune hepatitis after intake of dietary supplements containing glucosamine and chondroitin sulfate. Int J Clin Pharmacol Ther 2013;51(3):219-23. PubMed
- Provenza JR, Shinjo SK, Silva JM, Peron CR, Rocha FA. Combined glucosamine and chondroitin sulfate, once or three times daily, provides clinically relevant analgesia in knee osteoarthritis. Clin Rheumatol 2015;34:1455-62. PubMed
- Ossendza RA, Grandval P, Chinoune F, Rocher F, Chapel F, Bernardini D. [Acute cholestatic hepatitis due to glucosamine forte]. Gastroenterol Clin Biol. 2007 Apr;31(4):449-50.
- Audimoolam VK, Bhandari S. Acute interstitial nephritis induced by glucosamine. Nephrol Dial Transplant 2006;21(7):2031. PubMed
- Greenlee H, Crew KD, Shao T, Kranwinkel G, Kalinsky K, Maurer M, Brafman L, Insel B, Tsai WY, Hershman DL. Phase II study of glucosamine with chondroitin on aromatase inhibitor-associated joint symptoms in women with breast cancer. Support Care Cancer 201 PubMed
- Wilkens, P., Scheel, I. B., Grundnes, O., Hellum, C., and Storheim, K. Effect of glucosamine on pain-related disability in patients with chronic low back pain and degenerative lumbar osteoarthritis: a randomized controlled trial. JAMA 2010;304(1):45-52. PubMed
- Simon RR, Marks V, Leeds AR, Anderson JW. A comprehensive review of oral glucosamine use and effects on glucose metabolism in normal and diabetic individuals. Diabetes Metab Res Rev 2011;27(1):14-27. PubMed
- Smidt D, Torpet LA, Nauntofte B, Heegaard KM, Pedersen AM. Associations between labial and whole salivary flow rates, systemic diseases and medications in a sample of older people. Community Dent Oral Epidemiol 2010;38(5):422-35. PubMed
- Wangroongsub Y, Tanavalee A, Wilairatana V, Ngarmukos S. Comparable clinical outcomes between glucosamine sulfate-potassium chloride and glucosamine sulfate sodium chloride in patients with mild and moderate knee osteoarthritis: a randomized, double-blind
- Chopra A, Saluja M, Tillu G, Venugopalan A, Sarmukaddam S, Raut AK, Bichile L, Narsimulu G, Handa R, Patwardhan B. A Randomized Controlled Exploratory Evaluation of Standardized Ayurvedic Formulations in Symptomatic Osteoarthritis Knees: A Government of I
- Swinburne LM. Glucosamine sulphate and osteoarthritis. Lancet 2001;357(9268):1617. PubMed
- Murphy RK, Ketzler L, Rice RD, Johnson SM, Doss MS, Jaccoma EH. Oral glucosamine supplements as a possible ocular hypertensive agent. JAMA Ophthalmol 2013;131(7):955-7. PubMed
- Kimball AB, Kaczvinsky JR, Li J, et al. Reduction in the appearance of facial hyperpigmentation after use of moisturizers with a combination of topical niacinamide and N-acetyl glucosamine: results of a randomized, double-blind, vehicle-controlled trial.
- Ma H, Li X, Sun D, et al. Association of habitual glucosamine use with risk of cardiovascular disease: prospective study in UK Biobank. BMJ. 2019 May 14;365:l1628. PubMed
- Hoban C, Byard R, Musgrave I. Hypersensitive adverse drug reactions to glucosamine and chondroitin preparations in Australia between 2000 and 2011. Postgrad Med J. 2019 Oct 9. pii: postgradmedj-2019-136957. PubMed
- Tenti S, Veronese N, Cheleschi S, et al. Prescription-grade crystalline glucosamine sulfate as an add-on therapy to conventional treatments in erosive osteoarthritis of the hand: results from a 6-month observational retrospective study. Aging Clin Exp Res PubMed
- Yu H, Wu J, Chen H, et al. Glucosamine use is associated with a higher risk of cardiovascular diseases in patients with osteoarthritis: results from a large study in 685,778 subjects. Nutrients 2022;14(18):3694. PubMed
- Chu EC, Huang KHK, Cheung G, Ng G, Lin A. Delayed Skin Allergy to Glucosamine Chondroitin Supplement. Cureus 2023;15(3):e36310. PubMed
- Lila AM, Alekseeva LI, Baranov AA, et al. Chondroitin sulfate and glucosamine combination in patients with knee and hip osteoarthritis: A long-term observational study in Russia. World J Orthop 2023;14(6):443-457. PubMed
- Lehrer S, Morello T, Karrasch C, Rheinstein PH, Danias J. Effect of Glucosamine on Intraocular Pressure and Risk of Developing Glaucoma. J Glaucoma 2023. PubMed
- Rabade A, Viswanatha GL, Nandakumar K, Kishore A. Evaluation of efficacy and safety of glucosamine sulfate, chondroitin sulfate, and their combination regimen in the management of knee osteoarthritis: a systematic review and meta-analysis. Inflammopharmac PubMed
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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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