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Glucosamine (with Chondroitin): uses, side effects & brands
Glucosamine, often with chondroitin, is used for osteoarthritis joint comfort. It belongs to the Joint & osteoarthritis supplement group. These support joint comfort in osteoarthritis; evidence is modest and they complement, not replace, core care.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Joint & osteoarthritis supplement |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Mild to moderate knee osteoarthritis
- Joint stiffness and discomfort (modest benefit in some people)
- Used alongside exercise and weight control
Common brand names
- India: Glucosamine, Rejoint, Cartigen
- Worldwide: Osteo Bi-Flex, Move Free
Common side effects
- Stomach upset or nausea
- Diarrhoea or constipation
- Heartburn
Before taking it — precautions
- Tell your doctor if you have a shellfish allergy (some products are made from shellfish)
- Tell your doctor if you take warfarin (may increase its effect)
- People with diabetes should monitor sugar; results vary between brands
When to see a doctor urgently
- Unusual bruising or bleeding if on warfarin
- Facial swelling, rash or breathing difficulty (urgent)
- Joint that becomes hot, red and swollen (seek review)
Frequently asked questions
Does glucosamine rebuild cartilage?
There is no strong evidence that it rebuilds cartilage. Some people notice mild pain relief, others none.
How long should I try it?
Benefit, if any, usually appears after a couple of months. If there is no improvement, it is reasonable to stop.
Is it a replacement for exercise?
No. Strengthening exercise and weight control remain the most effective treatments for knee arthritis.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.