For patients living with knee osteoarthritis who want something beyond the standard cycle of steroid injections and physiotherapy — but are not yet ready for, or suitable for, surgery — a newer treatment called Arthrosamid is generating genuine clinical interest. It is not a household name yet, but the results from trials and early clinical use suggest it may represent a meaningful step forward in the non-surgical management of chronic knee pain.
This article explains what Arthrosamid is, how it differs from other injection treatments, who it is most suitable for, and what the evidence actually says about its effectiveness.
What Is Arthrosamid?
Arthrosamid is an injectable polyacrylamide hydrogel – a water-based gel that is injected directly into the knee joint. Unlike hyaluronic acid injections, which supplement the joint’s natural lubricating fluid and gradually dissipate over time, Arthrosamid integrates into the synovial tissue lining the joint. Once there, it functions as a long-lasting cushioning and lubrication layer.
The key distinction is durability. Most injection therapies require repeat treatments – steroid injections every few months, hyaluronic acid courses annually or more frequently. Arthrosamid is designed to provide relief that lasts considerably longer, with clinical data suggesting sustained benefit at two-year follow-up and beyond. This makes it a particularly relevant option for patients who are tired of the repeat injection cycle and want a more durable solution.
The Evidence Behind Arthrosamid
Arthrosamid received CE marking in Europe following clinical investigation demonstrating its safety and efficacy. The pivotal trial, published in peer-reviewed literature, found that patients treated with Arthrosamid for symptomatic knee osteoarthritis experienced statistically significant reductions in pain scores and improvements in function compared to baseline — with effects that were maintained at two years post-injection.
Importantly, the trial also demonstrated a good safety profile. Because polyacrylamide hydrogel is an inert material with no biological components, the risk of allergic reaction or immune response is very low. The most commonly reported side effects were temporary post-injection swelling and soreness, which typically resolved within a few days.
For a condition as prevalent as knee osteoarthritis – affecting an estimated 4.7 million people in England alone – a treatment that offers durable, safe, non-surgical pain relief represents a significant clinical development.
Who Is Arthrosamid Most Suitable For?
Arthrosamid is indicated for adults with mild to moderate knee osteoarthritis experiencing chronic knee pain that has not responded adequately to conservative treatments such as physiotherapy, exercise, weight management, and standard injection therapies. It is particularly relevant for patients who:
Have had limited or short-lived relief from repeated steroid or hyaluronic acid injections. Are not yet at the stage where knee replacement is clinically indicated or personally desired. Want a single intervention that offers the prospect of sustained relief rather than a revolving treatment schedule. Are active individuals who need better joint function to maintain their quality of life and independence.
It is not a treatment for severe end-stage osteoarthritis where significant structural damage is present — in those cases, surgical consultation is more appropriate. And as with any joint injection, proper assessment and diagnosis should always precede treatment to confirm suitability.
The PainFree Knee Injection Programme
Alongside Arthrosamid, Droitwich Knee Clinic also offers the PainFree knee injection — another advanced, non-surgical approach to chronic knee pain management. The PainFree treatment focuses on reducing joint inflammation and restoring comfort using targeted injection protocols developed for patients seeking alternatives to both surgery and the standard injection cycle.
The availability of multiple advanced injection options at a single specialist clinic means patients are not limited to one-size-fits-all treatment. A thorough consultation will identify which approach — Arthrosamid, PainFree, PRP, hyaluronic acid, or a combination — best matches the patient’s diagnosis, history, and goals.
What to Expect From the Arthrosamid Procedure
The procedure itself is straightforward. After a consultation confirming suitability, Arthrosamid is administered as a single injection into the knee joint under ultrasound or clinical guidance, typically taking around 15 to 20 minutes. It is performed as an outpatient procedure, meaning patients go home the same day.
Some patients experience mild soreness or swelling in the joint for 24 to 72 hours following the injection, which is a normal inflammatory response. Pain relief and functional improvement typically develop gradually over the following weeks as the gel integrates and the joint environment stabilises. Most patients begin to notice meaningful benefit within four to eight weeks.
Because Arthrosamid integrates into the joint tissue rather than simply being absorbed, the effects are sustained without the need for frequent repetition. This is a meaningful quality of life advantage — fewer clinic visits, fewer procedures, less disruption.
A Non-Surgical Path Worth Taking Seriously
The management of knee osteoarthritis has historically been framed as a binary choice: manage with painkillers and standard injections until the joint deteriorates enough to require replacement. Arthrosamid and similar advanced treatments are beginning to change that framing — offering a genuine middle path for patients who need more than standard treatment but less than surgery.
For the right patient, this is not a second-best option. It is a clinically sound, evidence-backed treatment that has demonstrated real impact on both pain levels and quality of life. The key is an accurate assessment by a specialist who understands the full range of options and is not anchored to any single approach.
At Droitwich Knee Clinic, with over 30 years of specialist experience and access to the latest injection technologies, patients in Birmingham and across the West Midlands have access to exactly this kind of nuanced, expert-led care.
Droitwich Knee Clinic | 27 New Road, Bromsgrove B60 2JL | Tel: 01527 919848 | droitwichkneeclinic.co.uk