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Arthrosamid® injections are a long lasting gel treatment that help cushion your knee and ease osteoarthritis pain.
Arthrosamid® injections are an innovative, non surgical treatment for knee osteoarthritis. A soft, gel like substance called polyacrylamide hydrogel (PAAG) is injected directly into your knee joint. The gel cushions your joint, improves lubrication, and helps reduce pain, to offer long lasting symptom relief for many patients.
Knee osteoarthritis is a common condition where the protective cartilage in your knee gradually wears down. This can lead to pain, stiffness, swelling, and reduced mobility.
Symptoms often develop slowly and may affect daily activities such as walking, climbing stairs or exercising. While medication, physiotherapy, and lifestyle changes can help, some people continue to experience discomfort and look for longer lasting options.
Arthrosamid® is injected into the synovial cavity of your knee, where it blends with the surrounding tissue. The hydrogel acts as a cushioning, stabilising layer that helps reduce friction inside your joint. Unlike treatments that simply mask symptoms, Arthrosamid® becomes part of your joint lining, providing ongoing support and helping to improve comfort and mobility over time.
Many patients choose Arthrosamid® injections because they offer:
Arthrosamid® may be considered for people with knee osteoarthritis who:
Suitability is always assessed by a specialist following a clinical consultation and diagnostic review.
Arthrosamid® injections are usually performed as an outpatient procedure.
After cleaning the area, your clinician may use local anaesthetic to keep you comfortable. The Arthrosamid® hydrogel is then injected directly into your knee joint using a fine needle, often under ultrasound guidance to ensure accurate placement. The procedure typically takes around 20 to 30 minutes, and you can go home shortly afterwards.
Most people tolerate Arthrosamid® well, but as with any injection, there are potential risks. These may include temporary swelling, discomfort at the injection site, or a feeling of fullness in your knee. Infection or allergic reactions are rare. Your consultant will explain the risks and answer any questions before you decide to proceed.
Recovery is usually quick. Many people return to normal daily activities within a day or two. You may be advised to avoid strenuous exercise for a short period while your joint settles.
Some patients notice improvement within weeks, while for others the benefits develop gradually over several months as the hydrogel integrates with your joint lining.
The cost of an Arthrosamid® injection will depend on the hospital or clinic you choose for your care.
At Ramsay, you will receive a formal quotation price for your treatment following a consultation with one of our specialists. This quotation will be valid for 60 days, giving you time to consider your options.
We are recognised by all major medical insurers, and it’s important to find out whether your policy covers Arthrosamid® injections. We advise you to obtain written authorisation from your insurance provider before starting treatment.
If you are paying for your treatment yourself, we offer a number of finance options:
You can find more information here.
Ramsay Health Care offers access to experienced orthopaedic consultants who specialise in joint preservation and non surgical treatments.
You’ll benefit from modern diagnostic facilities, a calm and supportive environment, and personalised care from your first consultation through to recovery.
Our teams are committed to helping you get back to moving with greater comfort.
Contact us today to learn more about Arthrosamid® injections with Ramsay Health Care.
Many people experience long lasting relief, with benefits that can continue for months or even years because the hydrogel becomes part of the joint lining rather than wearing off quickly. Your clinician will discuss what this may mean for you.
Long term side effects are uncommon. Most people experience only mild, short term discomfort or swelling after the injection. Serious complications such as infection or allergic reactions are rare, and your clinician will explain these risks before treatment.
Arthrosamid® may be suitable for people with knee osteoarthritis who still have pain or stiffness despite conservative treatments and who want a non surgical option. Suitability is always confirmed through a consultation and clinical assessment.
You may feel a brief sting or pressure during the injection, but local anaesthetic is often used to keep you comfortable. Most people describe the procedure as very manageable.
Arthrosamid® is designed as a single injection treatment. In some cases, your clinician may discuss further options if symptoms return, but repeat injections are not routinely required.
Arthrosamid® is different from steroid and hyaluronic acid injections in how it works and how long it lasts.
Steroid injections reduce inflammation and can give short term pain relief, but the effect often wears off within weeks or months and repeat injections may be limited.
Hyaluronic acid injections aim to improve lubrication in your joint, but they also tend to provide temporary relief and may need to be repeated as a course.
Arthrosamid® injections uses a polyacrylamide hydrogel that becomes part of your joint lining, creating a soft, cushioning layer inside the knee. Because it integrates with the tissue rather than being absorbed or broken down, it is designed to offer longer lasting relief from osteoarthritis symptoms, often from a single injection. Your consultant can help you compare these options and decide which approach best suits your symptoms, lifestyle and treatment goals.
Dr Adrian Head-Rapson
Pain Management
Dr Adrian Head-Rapson is a Consultant Anaesthetist who specialises in Pain management in Lancashire and Manchester.
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Ramsay Health Care UK is proud to announce that 20 of its hospitals across the UK have been recognised by Doctify with Patient Experience badges for 2026, reflecting consistently high standards of care based on real patient feedback.
Ramsay Health Care UK is delighted to announce that all 25 hospitals providing endoscopy services have achieved the Joint Advisory Group (JAG) accreditation, and are the only independent provider to attain this.
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