Indications
Chondroitin is a joint supplement used to ease pain and stiffness in osteoarthritis (wear and tear of the joints), most often of the knee. It is usually combined with Glucosamine, and creams with both are also available. Research results are mixed: some people notice a modest benefit, others do not.
How It Works
Chondroitin is a natural part of the cartilage that cushions the ends of the bones. It is thought to help cartilage hold water and to slow its breakdown. It does not work quickly like a painkiller; any benefit builds up over weeks.
Dosage and Administration
Adults: usually 800 to 1200 mg a day, as one dose or divided doses, often together with Glucosamine (commonly 1500 mg a day). Take with food. Allow 2 to 3 months to judge whether it helps, and stop if there is no benefit. Cream: rub gently into the skin over the painful joint 2 to 3 times a day, or as directed on the pack. Not recommended for children.
Interactions
Chondroitin, especially together with Glucosamine, may increase the effect of Warfarin and raise the risk of bleeding. If you take Warfarin or another blood thinner, ask your doctor first and have your blood tests checked more often. Glucosamine in combination products can slightly affect blood sugar in people with diabetes.
Contraindications
- Allergy to chondroitin or any ingredient of the product
- Allergy to shellfish, for products that contain Glucosamine made from shellfish (check the label)
Side Effects
Usually well tolerated. Some people have mild nausea, stomach upset, bloating, diarrhoea, constipation or headache. The cream may cause mild skin redness or itching.
Get urgent medical help if you have signs of an allergic reaction (rash, swelling of the face or lips, difficulty breathing) or unusual bleeding or bruising, especially if you take a blood thinner.
Pregnancy and Lactation
There is not enough safety information for pregnancy or breastfeeding. It is best avoided unless a doctor advises it.
Precautions and Warnings
- Ask a doctor first if you have a bleeding disorder, asthma, diabetes or kidney disease.
- Stop taking it 2 weeks before planned surgery unless your doctor says otherwise.
- It does not replace other osteoarthritis care such as exercise, weight control and physiotherapy.
Overdose
Taking too much is unlikely to cause serious harm but may cause stomach upset and diarrhoea. Seek medical advice if you feel unwell, and get urgent help if you are on a blood thinner and notice bleeding.
Therapeutic Class
Joint supplement (slow-acting cartilage component for osteoarthritis).
Storage
Store below 30°C in a dry place, away from light and out of the reach of children.
Prepared by the Oshud Alo team from standard drug references. For information only; always follow your doctor's advice.