Hyaluronic acid injections (also called viscosupplementation) are a non-surgical treatment that may help relieve pain and improve joint movement in people with knee osteoarthritis. Hyaluronic acid is a substance naturally found in healthy joint fluid, where it acts as both a lubricant and a shock absorber. With age or conditions such as arthritis, the natural hyaluronic acid in the joint can break down, reducing its ability to protect cartilage and cushion movement. Injecting a purified form of hyaluronic acid into the knee may help restore lubrication, reduce friction, and improve comfort during everyday activities.
Two commonly used brands in Sydney, NSW are Synvisc and Monovisc, both of which are available through Dr Darren Paterson. He offers these injections for suitable patients across the North Shore, Northern Beaches, Tamworth, and Central Coast NSW, often as part of a broader, personalised management plan that may also include physiotherapy, activity modification, and other non-surgical treatments.
How hyaluronic acid injections work
Hyaluronic acid injections aim to restore some of the knee joint’s natural lubrication and cushioning, which may be reduced in arthritis. This can help the joint move more smoothly and comfortably.
- Hyaluronic acid is injected directly into the affected knee joint
- It supplements the joint’s natural fluid to improve lubrication
- It may help reduce pain and stiffness, making movement easier
- For some people, it can delay the need for surgery by improving symptoms enough to continue with daily activities and rehabilitation
When hyaluronic acid injections may be considered
This treatment is generally recommended for patients whose knee arthritis symptoms are not well controlled with lifestyle measures or standard non-surgical treatments. It may be a way to reduce pain and maintain mobility without immediate surgery.
These injections may be recommended if you:
- Have mild to moderate knee osteoarthritis
- Experience persistent knee pain despite physiotherapy, activity modification, or oral medications
- Are unable to take certain anti-inflammatory medications due to other health conditions
- Are seeking to delay or avoid joint replacement surgery in the short term
The procedure
Hyaluronic acid injections are performed in rooms or under imaging guidance, depending on the case. The process is quick and usually well tolerated, with minimal downtime. The process includes:
- Assessment – Dr Paterson will confirm your diagnosis and ensure the injection is appropriate for your condition.
- Preparation – The skin is cleaned and the joint may be numbed with a local anaesthetic.
- Injection – Hyaluronic acid is injected directly into the knee joint, often in a single treatment (depending on the product used).
- Aftercare – You can usually resume light activity immediately but should avoid strenuous exercise for 48 hours.
Expected benefits and duration of relief
The benefits of hyaluronic acid injections can vary between patients. While it is not a cure for arthritis, it may provide a window of symptom relief that helps you stay active and participate in physiotherapy or other treatments.
- Relief may take several days to a few weeks to develop
- Some patients experience pain relief for up to 6–12 months, while others may have shorter or longer-lasting results
- The response varies depending on the severity of arthritis and overall joint health
Risks and considerations
Possible side effects are generally mild and temporary, and may include:
- Soreness or swelling at the injection site
- Warmth or redness around the knee
- Temporary flare-up of pain
Serious complications such as infection are rare. Dr Paterson will discuss potential risks and benefits before proceeding.
Cost of hyaluronic acid injections
The cost of hyaluronic acid injections varies depending on the brand and formulation used.
Estimated out-of-pocket cost:
- Most patients can expect to pay $785.60 per injection, which includes the cost of the product and the procedure
- Hyaluronic acid injections are not covered by Medicare however, partial rebates may be available from some private health insurers*
*Our team can confirm exact pricing at the time of booking.
Is a hyaluronic acid injection right for you?
Hyaluronic acid injections are not a cure for arthritis but can be an effective way to manage symptoms in selected patients. During your consultation, Dr Paterson will assess your knee, review your medical history, and discuss whether this treatment fits into your overall management plan.