Artroxan (Glucosamine): Uses, Dosage & Side Effects
A symptomatic slow-acting treatment for mild to moderate knee osteoarthritis
Quick Facts About Artroxan
Key Takeaways About Artroxan
- Designed for osteoarthritis symptom relief: Artroxan contains glucosamine and is specifically indicated for mild to moderate knee osteoarthritis in adults
- Slow-acting treatment: Unlike conventional painkillers, symptom improvement may take several weeks to months of continuous daily use
- Not suitable for shellfish allergy: Glucosamine is derived from shellfish shells – do not use if you have a known shellfish allergy
- Monitor blood sugar if diabetic: Glucosamine may affect blood glucose levels; more frequent monitoring is recommended during treatment
- Important warfarin interaction: Glucosamine may enhance the effect of anticoagulants such as warfarin; INR monitoring is essential when starting or stopping treatment
What Is Artroxan and What Is It Used For?
Artroxan contains glucosamine, a naturally occurring amino sugar that the body uses to build cartilage and synovial fluid. It is classified as a symptomatic slow-acting drug for osteoarthritis (SYSADOA) and is used to relieve symptoms of mild to moderate knee osteoarthritis in adults, including joint pain, stiffness, and reduced mobility.
Glucosamine is an endogenous substance, meaning the human body naturally produces it from glucose. It serves as one of the fundamental building blocks for glycosaminoglycans (GAGs) and proteoglycans, which are large structural molecules found in articular cartilage, synovial fluid, tendons, ligaments, and other connective tissues. These molecules are essential for maintaining the structural integrity, elasticity, and shock-absorbing properties of healthy joint cartilage.
In osteoarthritis, the balance between cartilage synthesis and degradation becomes disrupted, leading to progressive loss of cartilage, inflammation of the joint lining, and eventual bone-on-bone contact. The theory behind glucosamine supplementation is that providing additional exogenous glucosamine may support the body's natural cartilage repair processes, stimulate the production of proteoglycans, and help slow the progression of cartilage deterioration. Some research also suggests that glucosamine may possess mild anti-inflammatory properties, potentially through modulation of nuclear factor kappa-B (NF-κB) signaling pathways and inhibition of certain pro-inflammatory cytokines.
Artroxan is specifically indicated for the following use:
- Mild to moderate knee osteoarthritis in adults – to relieve symptoms including pain, stiffness, and functional limitation in the affected joint
It is important to understand that Artroxan is not a conventional painkiller. It does not provide immediate pain relief and should not be used to treat acute pain episodes. The therapeutic benefit of glucosamine, when it occurs, typically develops gradually over several weeks of regular daily use. Clinical guidelines from the European League Against Rheumatism (EULAR) and other international bodies have evaluated glucosamine as part of a comprehensive osteoarthritis management strategy that may also include physical therapy, weight management, exercise programs, and other pharmacological treatments as needed.
The clinical evidence for glucosamine is complex and has been the subject of extensive debate in the medical community. The Cochrane Collaboration has reviewed numerous randomized controlled trials of glucosamine for osteoarthritis. While some high-quality trials, particularly those using crystalline glucosamine sulfate, have demonstrated statistically significant improvements in pain and function compared to placebo, other trials using different formulations have shown more modest or inconsistent results. The European Medicines Agency (EMA) has approved certain glucosamine products as medicinal products for the symptomatic relief of mild to moderate knee osteoarthritis.
Unlike NSAIDs (such as ibuprofen or naproxen) that provide rapid pain relief within 30–60 minutes by blocking inflammatory pathways, Artroxan works through a fundamentally different mechanism. Glucosamine aims to support cartilage metabolism at the cellular level, which means its effects build up over time. Patients should expect to wait at least 2–3 weeks, and often longer, before noticing meaningful symptom improvement. If no benefit is observed after 2–3 months of continuous use, the treatment should be re-evaluated by a healthcare professional.
What Should You Know Before Taking Artroxan?
Before taking Artroxan, be aware that it must not be used by people with shellfish allergy (glucosamine is derived from crustaceans). Special caution is required for patients with diabetes, cardiovascular risk factors, or asthma. Artroxan is not recommended during pregnancy or breastfeeding and should not be used by individuals under 18 years of age.
Although Artroxan is available over the counter and is generally well-tolerated, there are several important contraindications, warnings, and precautions that must be considered before starting treatment. Understanding these factors is essential for safe and effective use of glucosamine.
Contraindications
You must not take Artroxan if any of the following apply:
- Allergy to glucosamine or any other ingredient in the product (see the ingredients section below)
- Allergy to shellfish – the glucosamine in Artroxan is extracted from the shells of crustaceans (shrimp, crab, lobster), and individuals with shellfish allergy may experience allergic reactions
These are absolute contraindications, meaning the medicine should not be used under any circumstances in these populations. If you are unsure whether you have a shellfish allergy, consult your doctor or pharmacist before taking Artroxan. Vegetarian and vegan glucosamine products derived from fermented corn or fungi are available as alternatives and do not carry shellfish allergy risks, but Artroxan specifically uses shellfish-derived glucosamine.
Warnings and Precautions
Talk to your doctor or pharmacist before taking Artroxan if any of the following situations apply to you:
Diabetes and impaired glucose tolerance: Because glucosamine is chemically derived from glucose (a sugar), there is a theoretical concern and some clinical evidence that it may affect blood sugar control. If you have diabetes mellitus or impaired glucose tolerance, your blood glucose levels should be monitored more frequently at the start of treatment and at regular intervals throughout therapy. Your doctor may need to adjust your diabetes medications accordingly. While the clinical significance of this effect remains debated in the medical literature, regulatory authorities recommend caution.
Cardiovascular risk factors: Elevated cholesterol levels have been observed in some patients treated with glucosamine. If you have known risk factors for cardiovascular disease – such as high blood pressure, high cholesterol, diabetes, smoking, or a family history of heart disease – your doctor should monitor your cholesterol levels during glucosamine treatment. The mechanism behind this potential effect is not fully understood, but regular lipid profile monitoring is prudent in at-risk patients.
Asthma: Worsening of pre-existing asthma symptoms has been reported in some patients taking glucosamine. If you have asthma, be alert for any changes in your breathing symptoms when starting Artroxan. If your asthma worsens, discontinue the product and consult your doctor immediately.
Stop taking Artroxan and seek immediate emergency medical attention if you experience any of the following symptoms, which may indicate a severe allergic reaction: swelling of the face, tongue, or throat; difficulty swallowing; skin rash combined with breathing difficulties. Although rare, these reactions can be life-threatening and require urgent treatment.
Children and Adolescents
Artroxan should not be used by individuals under 18 years of age. The safety and efficacy of glucosamine have not been established in the pediatric population. Osteoarthritis is predominantly a condition affecting adults, and the use of glucosamine supplementation in children and adolescents is not supported by clinical evidence.
Pregnancy and Breastfeeding
If you are pregnant, think you may be pregnant, or are planning to become pregnant, consult your doctor or pharmacist before taking Artroxan.
- Pregnancy: Artroxan should not be used during pregnancy. There is insufficient data on the effects of glucosamine on the developing fetus. As a precautionary measure, use during pregnancy is contraindicated.
- Breastfeeding: Use of Artroxan is not recommended during breastfeeding. It is not known whether glucosamine passes into breast milk, and the potential effects on the nursing infant have not been studied.
- Fertility: No studies have been conducted on the effects of glucosamine on human fertility.
Driving and Operating Machinery
Artroxan has no known direct effect on the ability to drive or operate machinery. However, if you experience dizziness or drowsiness while taking the capsules, you should not drive or use machines until these symptoms resolve. You are personally responsible for assessing whether you are fit to drive or perform tasks requiring concentration.
How Does Artroxan Interact with Other Drugs?
Artroxan (glucosamine) has notable interactions with warfarin and other anticoagulant medications, potentially increasing their blood-thinning effect. It may also reduce the absorption of tetracycline antibiotics. Always inform your doctor or pharmacist about all medications you are taking before starting glucosamine.
Although glucosamine has a relatively limited drug interaction profile compared to many conventional medicines, the interactions that do exist can be clinically significant. It is particularly important to be aware of the interaction with anticoagulants (blood thinners), as this can affect blood clotting and increase the risk of bleeding. Always tell your doctor or pharmacist about all medicines you are currently taking, have recently taken, or might take, including over-the-counter products and dietary supplements.
Major Interactions
The following interaction carries significant clinical risk and requires careful monitoring:
| Drug / Drug Class | Effect of Interaction | Clinical Advice |
|---|---|---|
| Warfarin and similar anticoagulants | Glucosamine may increase the anticoagulant effect of warfarin and related vitamin K antagonists, leading to an elevated INR (International Normalized Ratio) and increased bleeding risk. | INR must be monitored closely when starting and stopping glucosamine. Your doctor may need to adjust the warfarin dose. Report any unusual bruising or bleeding immediately. |
| Tetracycline antibiotics | Glucosamine may reduce the gastrointestinal absorption of tetracycline antibiotics, potentially decreasing their effectiveness against infections. | If you need to take both medications, separate the doses by at least 2 hours. Consult your doctor about potential alternative antibiotics if concurrent use is necessary. |
Additional Considerations
While the interaction profile of glucosamine is relatively narrow compared to many other medications, the following points deserve attention:
- Diabetes medications: Since glucosamine may theoretically affect blood glucose levels, patients on insulin or oral hypoglycemic agents (such as metformin, sulfonylureas, or SGLT2 inhibitors) should monitor blood sugar more closely. Dose adjustments of diabetes medications may occasionally be needed.
- Other anti-inflammatory agents: While no direct pharmacological interaction has been established between glucosamine and NSAIDs (such as ibuprofen or naproxen), many patients with osteoarthritis take both types of medication. There is no evidence that combining them increases adverse effects, but it is best to discuss concurrent use with your doctor.
- Diuretics: Some post-marketing reports have suggested a possible interaction between glucosamine and diuretic medications, though this has not been confirmed in controlled clinical studies.
If you are taking warfarin or any other anticoagulant medication, do not start or stop glucosamine without informing your doctor. The interaction between glucosamine and warfarin can develop gradually, and changes in INR may not be immediately apparent. Your doctor will need to monitor your blood clotting parameters more frequently during the transition period when starting or discontinuing glucosamine therapy.
What Is the Correct Dosage of Artroxan?
The recommended dose of Artroxan for adults is 2 capsules (1,250 mg glucosamine) taken once daily with water. Capsules should be swallowed whole without chewing and can be taken with or without food. Symptom relief may take several weeks to appear, and treatment should be re-evaluated if no improvement is seen after 2–3 months.
Always use Artroxan exactly as directed by your doctor or pharmacist. If you are unsure about the correct dosage or how to take the medicine, ask your doctor or pharmacist for guidance. The dosing regimen for glucosamine is straightforward, but it is important to understand the expected timeline for therapeutic benefit and what to do in case of missed or excessive doses.
Adults
Standard Adult Dosage
Dose: 2 capsules (1,250 mg glucosamine, equivalent to 1,500 mg glucosamine hydrochloride) once daily
Administration: Swallow the capsules whole with a glass of water. Do not crush or chew the capsules.
Timing: Capsules can be taken with or without food. Taking them at the same time each day helps maintain consistent levels and promotes adherence.
Duration: Continue treatment for at least 2–3 months to allow adequate time for therapeutic benefit to develop. If no improvement is noted after this period, consult your doctor for a treatment review.
| Patient Group | Recommended Dose | Important Notes |
|---|---|---|
| Adults (18+ years) | 2 capsules (1,250 mg) once daily | Swallow whole with water. Re-evaluate after 2–3 months if no improvement. |
| Elderly | 2 capsules (1,250 mg) once daily | No dose adjustment required. Monitor blood sugar if diabetic and INR if on anticoagulants. |
| Children and adolescents (<18 years) | Not recommended | Safety and efficacy have not been established in this age group. |
| Patients with kidney impairment | Consult your doctor | No specific dose adjustment studies available. Use under medical supervision. |
| Patients with liver impairment | Consult your doctor | No specific dose adjustment studies available. Use under medical supervision. |
Missed Dose
If you forget to take your daily dose of Artroxan, do not take a double dose to make up for the missed one. Simply skip the forgotten dose and continue with your normal dosing schedule the following day. Taking a double dose does not provide additional benefit and may increase the risk of side effects. Because glucosamine works by building up in the body over time, missing an occasional dose is unlikely to significantly affect the overall therapeutic outcome.
Overdose
If you accidentally take more Artroxan than prescribed, or if a child ingests the medicine, contact your doctor, hospital emergency department, or poison control center immediately for assessment and advice.
Signs and symptoms of glucosamine overdose may include:
- Headache
- Dizziness
- Confusion
- Joint pain
- Nausea and vomiting
- Diarrhea or constipation
An overdose may not always produce symptoms. Treatment is generally supportive, as there is no specific antidote for glucosamine overdose. In most cases, the prognosis following accidental overdose is excellent, given the relatively low toxicity profile of glucosamine.
Stopping Treatment
Consult your doctor before stopping Artroxan. While glucosamine is not associated with withdrawal symptoms or rebound effects, your doctor may wish to discuss alternative treatment strategies for managing your osteoarthritis symptoms if you decide to discontinue glucosamine therapy.
What Are the Side Effects of Artroxan?
Like all medicines, Artroxan can cause side effects, although not everyone experiences them. The most common side effects are gastrointestinal symptoms such as nausea, abdominal pain, indigestion, diarrhea, and constipation, as well as headache and drowsiness. Most side effects are mild and temporary. Seek immediate medical attention if you experience signs of a severe allergic reaction.
The side effect profile of glucosamine is generally considered favorable compared to conventional analgesics and NSAIDs. Most adverse reactions are mild, transient, and primarily affect the gastrointestinal system. However, serious adverse events, while rare, have been reported during post-marketing surveillance. It is important to be aware of both common and rare side effects so you can take appropriate action if they occur.
Common Side Effects
- Headache
- Drowsiness and fatigue
- Indigestion (dyspepsia)
- Abdominal pain
- Diarrhea
- Constipation
- Nausea
- Flatulence (gas)
Uncommon Side Effects
- Skin rash
- Itching (pruritus)
- Skin redness (flushing)
Reported Side Effects (Frequency Unknown)
- Allergic reactions (hypersensitivity)
- Vomiting
- Hives (urticaria)
- Dizziness
- Swollen feet or ankles (peripheral edema)
- Asthma flare-ups or worsening of existing asthma
- Impaired blood sugar control in diabetic patients
- Elevated cholesterol levels
- Fluctuations in blood clotting ability (INR changes)
- Elevated liver enzymes
- Jaundice (yellowing of skin or eyes)
- Angioedema (swelling of face, tongue, or throat)
Stop taking Artroxan and seek emergency medical care immediately if you develop any of the following symptoms of a serious allergic reaction (angioedema): swelling of the face, tongue, or throat; difficulty swallowing; skin rash combined with breathing difficulties. These reactions, while very rare, can be life-threatening and require urgent treatment.
Most common side effects such as mild gastrointestinal discomfort tend to improve as the body adjusts to the medication. Taking Artroxan with food may help reduce stomach-related side effects. If any side effect becomes troublesome or persists, or if you notice any adverse effect not listed above, consult your doctor or pharmacist.
Reporting suspected adverse reactions after a medicine has been authorized is important, as it allows ongoing monitoring of the medicine's benefit-risk balance. Healthcare professionals and patients are encouraged to report any suspected adverse reactions to their national pharmacovigilance authority (e.g., the EMA in Europe, the FDA in the United States, or the MHRA in the United Kingdom).
How Should You Store Artroxan?
Store Artroxan at or below 30°C in the original packaging. Keep the capsules protected from moisture and out of the sight and reach of children. Do not use the medicine after the expiry date printed on the packaging.
Proper storage of Artroxan is essential to maintain the quality, safety, and effectiveness of the medicine throughout its shelf life. Glucosamine is sensitive to moisture, which can degrade the active ingredient and affect the capsule integrity.
- Temperature: Store at or below 30°C (86°F). Avoid exposure to excessive heat or direct sunlight.
- Moisture protection: Keep the capsules in the original blister packaging until ready to use. Glucosamine is moisture-sensitive, and exposure to high humidity can affect the product quality.
- Keep out of reach of children: Store the medicine where children cannot see or reach it to prevent accidental ingestion.
- Expiry date: Do not use Artroxan after the expiry date stated on the carton. The expiry date refers to the last day of the stated month.
- Disposal: Do not dispose of medicines via wastewater or household waste. Return unused or expired medicines to your pharmacy for proper disposal. This helps protect the environment.
Artroxan is available in blister packs containing 10, 60, or 180 (3 × 60) hard capsules. Not all pack sizes may be marketed in every country.
What Does Artroxan Contain?
Each Artroxan capsule contains 625 mg of glucosamine (equivalent to 750 mg glucosamine hydrochloride) as the active ingredient. The capsules also contain magnesium stearate as an excipient and are made of gelatin with iron oxide colorants.
Understanding the full composition of Artroxan is important, particularly for patients with allergies or dietary restrictions. The complete list of ingredients is as follows:
Active Ingredient
- Glucosamine 625 mg (equivalent to 750 mg glucosamine hydrochloride) per capsule – the therapeutic component derived from shellfish (crustacean shells)
Excipients (Inactive Ingredients)
- Magnesium stearate – used as a lubricant in the capsule manufacturing process to prevent the powder from sticking to equipment
Capsule Shell Composition
- Gelatin – forms the capsule shell (not suitable for vegetarians or vegans)
- Red iron oxide (E172) – colorant
- Titanium dioxide (E171) – colorant providing opacity
- Black iron oxide (E172) – colorant
The combination of these colorants gives Artroxan capsules their characteristic brown appearance. The capsules are hard gelatin capsules designed to be swallowed whole with water.
Artroxan contains glucosamine derived from shellfish (crustaceans) and a capsule shell made from gelatin (animal-derived). People with shellfish allergies must not take this product. Those who require vegetarian or vegan alternatives should discuss other glucosamine formulations with their pharmacist. The product does not contain gluten, lactose, or soy.
Frequently Asked Questions About Artroxan
Artroxan contains glucosamine and is used to relieve symptoms of mild to moderate knee osteoarthritis (joint wear and tear) in adults. It works by providing building blocks for cartilage repair and may help reduce joint pain and stiffness over time. It is classified as a symptomatic slow-acting drug for osteoarthritis (SYSADOA) and is not intended for treating acute pain episodes.
Unlike conventional painkillers that work within minutes to hours, Artroxan is a slow-acting treatment. Symptom relief typically does not begin until after several weeks of regular daily use. In some cases, it may take up to 2–3 months before meaningful improvement is noticed. If no benefit is seen after 2–3 months of continuous use, consult your doctor to reassess whether continuing treatment is appropriate.
No. You must not take Artroxan if you are allergic to shellfish, because the glucosamine in this product is derived from crustacean shells (shrimp, crab, lobster). If you have a known shellfish allergy but wish to try glucosamine, discuss alternative preparations made from non-shellfish sources (such as fermented corn-based glucosamine) with your doctor or pharmacist.
Yes, glucosamine has been shown to increase the anticoagulant effect of warfarin and similar blood-thinning medications (vitamin K antagonists). This can raise the INR and increase the risk of bleeding. If you are taking an anticoagulant, your doctor must monitor your INR levels more closely when you start or stop taking glucosamine. Never start or stop Artroxan without informing your doctor if you are on blood thinners.
People with diabetes or impaired glucose tolerance should use Artroxan with caution and under medical supervision. Since glucosamine is derived from glucose, it may potentially affect blood sugar levels. Blood glucose monitoring should be more frequent at the start of treatment and at regular intervals thereafter. Your doctor may need to adjust your diabetes medications. While the clinical impact appears to be modest in most patients, individual responses can vary.
Artroxan should not be used during pregnancy due to insufficient safety data. There is not enough evidence to confirm that glucosamine is safe for the developing baby. Use during breastfeeding is also not recommended, as it is unknown whether glucosamine passes into breast milk. If you are pregnant, suspect pregnancy, or are breastfeeding, consult your doctor before taking any glucosamine product.
References and Sources
- Towheed TE, Maxwell L, Anastassiades TP, et al. Glucosamine therapy for treating osteoarthritis. Cochrane Database of Systematic Reviews. 2005;(2):CD002946. doi:10.1002/14651858.CD002946.pub2
- Reginster JY, Deroisy R, Rovati LC, et al. Long-term effects of glucosamine sulphate on osteoarthritis progression: a randomised, placebo-controlled clinical trial. The Lancet. 2001;357(9252):251-256. doi:10.1016/S0140-6736(00)03610-2
- European Medicines Agency (EMA). Community herbal monograph on glucosamine. Committee on Herbal Medicinal Products. EMA/HMPC assessment report.
- Bruyere O, Cooper C, Pelletier JP, et al. An algorithm recommendation for the management of knee osteoarthritis in Europe and internationally: a report from a task force of the European Society for Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (ESCEO). Seminars in Arthritis and Rheumatism. 2014;44(3):253-263.
- Kolasinski SL, Neogi T, Hochberg MC, et al. 2019 American College of Rheumatology/Arthritis Foundation Guideline for the Management of Osteoarthritis of the Hand, Hip, and Knee. Arthritis Care & Research. 2020;72(2):149-162. doi:10.1002/acr.24131
- Jordan KM, Arden NK, Doherty M, et al. EULAR Recommendations 2003: an evidence based approach to the management of knee osteoarthritis. Annals of the Rheumatic Diseases. 2003;62(12):1145-1155.
- Wandel S, Juni P, Tendal B, et al. Effects of glucosamine, chondroitin, or placebo in patients with osteoarthritis of hip or knee: network meta-analysis. BMJ. 2010;341:c4675. doi:10.1136/bmj.c4675
- Clegg DO, Reda DJ, Harris CL, et al. Glucosamine, chondroitin sulfate, and the two in combination for painful knee osteoarthritis. New England Journal of Medicine. 2006;354(8):795-808. doi:10.1056/NEJMoa052771
- World Health Organization (WHO). Osteoarthritis: WHO/ICD classification and management guidelines. World Health Organization, Geneva.
- British National Formulary (BNF). Glucosamine monograph. National Institute for Health and Care Excellence (NICE). Updated 2025.
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