Arthrosamid Knee Injection
Long-lasting relief from knee osteoarthritis – without surgery
Knee osteoarthritis narrows your life gradually. Stairs, the dog walk, standing at the sink, getting out of a low chair — each becomes something to plan around. For many people the next thing offered is a knee replacement, and not everyone is ready for that.
Arthrosamid is a single hydrogel injection that relieves knee osteoarthritis pain, reduces stiffness and restores function, without surgery. Meyer Physio is an approved Arthrosamid clinic, offering it privately in Weybridge, Surrey.
What Is Arthrosamid?
Arthrosamid® is an advanced, long-lasting injectable hydrogel designed to relieve knee osteoarthritis pain without the need for surgery. Made from 97.5% water and 2.5% cross-linked polyacrylamide, it offers long-lasting relief from a single injection — considerably longer than is typically seen with alternative treatments such as hyaluronic acid or Cingal injections.
It integrates with the joint lining, known as the synovium, enhancing lubrication, cushioning the joint, and reducing inflammation to improve comfort and mobility.
Why Choose Arthrosamid?
- Lasting Relief – Benefit from a single injection, with clinical studies showing effects lasting up to three to five years.
- Non-Surgical – Outpatient procedure with no hospital stay or downtime.
- Clinically Proven – The polyacrylamide hydrogel technology is backed by over 20 years of research.
- Delays Surgery – May help to delay knee replacement.
- Excellent Results – 70–75% report a significant improvement in symptoms; up to 50% describe it as “life-changing”. For more on results and outcome studies, see the Arthrosamid website.
How Does Arthrosamid Work?
Knee osteoarthritis leads to cartilage breakdown and inflammation in the synovial lining of the joint.
Once injected, Arthrosamid:
- Bonds with the joint lining to create a soft, cushioning barrier
- Enhances lubrication within the joint
- Reduces synovial inflammation and associated pain
- Improves joint function and mobility
What to Expect
Step 1 – Consultation
Your clinician will assess your knee and determine whether Arthrosamid is suitable for you.
Step 2 – Injection
You will be given antibiotics about an hour before your Arthrosamid treatment to protect you from any potential risk of infection.
To ensure the hydrogel is delivered to the precise location in the joint, we always perform ultrasound guided injection therapy.
Local anaesthetic is used to numb the area, and the hydrogel is then injected directly into the knee joint in a single, one-step procedure.
Step 3 – Aftercare
Mild discomfort may occur once the anaesthetic wears off. We’ll advise you on post-treatment care and symptoms to monitor, though side effects are rare.
The clinician who assessed your knee and gave the injection is the same one who sees you afterwards, so your follow-up carries on from the treatment rather than starting again with somebody new.
Is Arthrosamid Right for Me?
It may be a good option if:
- You have knee osteoarthritis that’s no longer responding to physiotherapy, exercise, or standard pain relief
- You want to avoid or delay surgery
- You’re seeking a long-term solution with minimal disruption to your lifestyle
Private Arthrosamid treatment in Weybridge
This treatment is not routinely funded on the NHS, so it is provided privately on a self-pay basis. We are an approved Arthrosamid clinic and carry out the assessment, the ultrasound-guided injection and your follow-up in Weybridge, so there is no onward referral to another provider and no waiting list.
Your first appointment is a full hour of assessment. Where Arthrosamid is the right option we explain what it involves, what it is likely to achieve and what it costs, and arrange the treatment once you have had time to consider it.
Frequently Asked Questions
How soon will I feel the results?
Most people start noticing improvements around 4 weeks post-injection.
Does the injection hurt?
Local anaesthetic is used to numb the area first, and most people tolerate the procedure well. You may feel pressure as the hydrogel goes in, and the knee can be mildly sore for a few days afterwards. Tell us at any point if you are uncomfortable.
How long does Arthrosamid last?
Clinical studies show benefits may last up to three to five years from a single injection.
What is the recovery time?
This is an outpatient procedure with no hospital stay and no significant downtime. Mild discomfort is common once the local anaesthetic wears off. You will be given specific aftercare advice at your appointment, and the Arthrosamid patient rehab booklet below sets out the exercise guidance that follows treatment.
Are there any side effects?
Side effects are rare. The most common is temporary discomfort or swelling around the knee in the days after the injection. Antibiotics are given about an hour beforehand as a precaution against infection. We will go through the risks with you at your consultation and tell you what to watch for afterwards.
Can I still have knee replacement surgery later?
Yes — Arthrosamid doesn’t interfere with the possibility of future knee surgery.
Can I receive Arthrosamid treatment in both my knees?
Yes, it is possible to have both knees treated with Arthrosamid but your clinician is best placed to decide the time period before the treatments. Please contact us for a discounted price for treatment of more than one joint.
How much does Arthrosamid cost?
It is provided as a single treatment package. Current fees are on our treatment pricing page, and a discounted price applies where both knees are treated.
Where can I get more information?
If you have any questions about this treatment or would like to know whether it’s suitable for you, feel free to get in touch with Meyer Physio by phone or email. You can also explore the patient brochure and leaflets linked below, or the official Arthrosamid website for further information.
Arthrosamid Brochures
To learn more about the Arthrosamid treatment, download a patient brochure or patient leaflet from the Arthrosamid website below:
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Download [Link verified 21/08/2026] |
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Download [Link verified 21/08/2026] |
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Download [Link verified 21/08/2026] |
* Arthrosamid®, the Arthrosamid logos and images are copyright Contura International Ltd.
Written by Suegnet Meyer, Advanced Practice Musculoskeletal Physiotherapist and MSK Sonographer. HCPC registered [PH55635]. Chartered Society of Physiotherapy member [66175].
Last reviewed: 10 September 2026.
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