Introduction

Knee osteoarthritis is a common and often debilitating condition that affects millions of people, causing pain, stiffness, and limited movement. These symptoms can make everyday tasks like walking, climbing stairs, or even simple household chores a challenge. For many, simply reducing pain for a short while is not enough—they want reliable, ongoing comfort that lets them carry on with life without constant setbacks.

This article takes a closer look at two injection treatments for knee osteoarthritis: Arthrosamid and corticosteroids. We will explore how these options differ, particularly in their ability to provide longer-term relief that supports daily function and continuity. Professor Paul Lee, a specialist in cartilage health, along with the experienced MSK Doctors team, offer expert, patient-centred care to help individuals choose the treatment best suited to their needs.

What Are Arthrosamid and Corticosteroid Injections?

Arthrosamid is an injectable gel made from polyacrylamide hydrogel, which acts as a cushion inside the knee joint. Unlike some treatments that might damage joint tissue over time, Arthrosamid is designed with a “non-catabolic” approach—this means it does not break down cartilage or joint structures. Instead, it helps relieve pain and improve movement by creating a more supportive joint environment, with effects intended to last for months or even years.

On the other hand, corticosteroid injections are well-established treatments that reduce inflammation quickly within the joint. They work by calming the immune response that causes swelling and pain, bringing relief often within days. However, this effect typically lasts only a few weeks, and corticosteroids do not contribute to protecting or repairing the joint itself.

A recent study comparing corticosteroids and hyaluronic acid injections (another common treatment) found that “CS [corticosteroids] offered clinically relevant benefits compared to HA at short-term while HA provided superior functional improvement at long-term.” This highlights how corticosteroids tend to be favoured for immediate relief during flare-ups, whereas longer-lasting treatments like Arthrosamid might offer steadier support.

Choosing between these options depends on individual factors such as the severity of symptoms, medical history, and lifestyle priorities.

Sustained Effect and Planning for Everyday Function

One of the main differences between Arthrosamid and corticosteroid injections is how long their benefits last. Corticosteroids often bring quick relief but this tends to be short-lived, meaning repeat injections might be necessary. However, repeated steroid use is not always ideal, as it may affect joint health if overused.

In contrast, Arthrosamid has been shown to provide meaningful symptom improvement for up to 24 months in many patients. Research shows this treatment is particularly effective for older individuals without diabetes and those with less severe osteoarthritis. To quote one study, “Polyacrylamide hydrogel injections… provided improvement in knee OA symptoms over 24 months, in older, non-diabetic patients with lower KL grades.” Additionally, “patient factors that increased the odds of reaching [meaningful improvement] included being older, having a lower OA grade, not having diabetes, and having both knees affected.”

Having relief that lasts this long makes it easier for people to plan and maintain their daily routines—whether that’s work, family time, or leisure activities—without the disruption caused by unpredictable pain.

It’s also worth noting that another study comparing corticosteroids with hyaluronic acid found that “the symptomatic trajectory after 36 months showed no worsening in knee OA patients undergoing intra‐articular injections and different benefits based on the treatments.” This suggests that while none of these injections halt the progression of osteoarthritis completely, their benefits on symptoms can influence quality of life over the medium term.

Professor Paul Lee and the MSK Doctors team use such evidence alongside clinical experience to help patients find the best fit for their long-term goals.

Side Effects and Suitability: A Closer Look

Safety is always a key consideration when choosing treatment. Arthrosamid’s non-catabolic nature means it is particularly suitable for patients worried about preserving their joint tissue.

The same research study noted some complications, stating that “155 out of 314 knees developed complications,” and that “49 patients required total knee replacement over two years, with those having more severe osteoarthritis more likely to need surgery.” This shows that while Arthrosamid can be beneficial, it is not a cure-all, and patients must be carefully selected and monitored.

Corticosteroids, although effective, carry their own risks—especially if used frequently. These may include joint irritation, temporary worsening of symptoms after injection, or more serious joint damage over time. However, one study reassuringly found that “both corticosteroids and hyaluronic acid groups showed no overall clinical worsening from baseline to 36 months,” though some structural changes in the joint were observed.

The MSK Doctors team take a personalised approach, weighing up the potential benefits and risks of each option, and providing clear guidance to help patients make informed choices.

Continuity and Quality of Life: Patient-Centred Considerations

Maintaining consistent comfort is central to living well with knee osteoarthritis. When patients experience fewer flare-ups and more reliable relief, they can continue with work, family life, and hobbies without being constantly disrupted by pain or stiffness.

Professor Paul Lee and the MSK Doctors team prioritise this continuity in care. They work closely with patients to understand their unique situations, preferences, and expectations, ensuring treatment plans fit not just medical needs but also life’s demands.

Conclusion

In summary, Arthrosamid and corticosteroid injections offer different advantages for managing knee osteoarthritis. Corticosteroids provide quick, short-term relief that can be valuable during flare-ups, while Arthrosamid aims to deliver a steadier, longer-lasting effect that supports ongoing joint health and everyday function.

Ultimately, the best choice depends on individual circumstances including symptom severity, health background, and lifestyle priorities. Professional advice from expert clinicians like Professor Paul Lee and the MSK Doctors team can help patients navigate these options and make decisions that suit their personal needs.

For personalized medical advice, always consult a qualified healthcare professional.