PRP vs Cortisone: Understanding the Difference
PRP vs cortisone is a common question when joint or tendon pain becomes persistent. These are two treatment options patients frequently weigh up. These are cortisone injections and platelet-rich plasma (PRP) therapy. Both are given by injection, and both can reduce pain. However, they work in completely different ways. The choice between them matters more than most patients realise.
How Cortisone Works
Cortisone is a corticosteroid — a powerful anti-inflammatory medication. When injected into a painful joint or tendon, it rapidly reduces inflammation. This provides significant short-term pain relief, often within days. For acute flare-ups, inflammatory arthritis, or situations where fast relief is the primary goal, cortisone remains a clinically useful tool.
However, cortisone does not repair damaged tissue. It suppresses the inflammatory response, which reduces pain in the short term. However, it does nothing to address the underlying structural cause. Repeated cortisone injections have also been linked to weakening of tendons and cartilage over time. For this reason, most practitioners limit how often they are used in any given joint.
How PRP Works
Platelet-rich plasma (PRP) therapy takes a fundamentally different approach. A small sample of your own blood is drawn and processed in a centrifuge to concentrate the platelets. These cells are responsible for clotting and for releasing growth factors that stimulate tissue repair. This concentrated plasma is then injected directly into the affected area.
Rather than suppressing inflammation, PRP works with your body’s own healing mechanisms. The growth factors released by the platelets signal surrounding cells to begin repair. This includes cartilage, tendon fibres, ligament tissue, and joint structures. The goal is not just pain relief, but actual tissue regeneration.
Because PRP uses your own blood, the risk of allergic reaction or rejection is extremely low. It is considered a biologic treatment — meaning it harnesses biological processes rather than introducing synthetic chemicals into the body.
Which Works Better — and For What?
The honest answer is that it depends on your condition, its severity, and your treatment goals.
Some cases involve acute inflammatory flare-ups, such as a sudden worsening of bursitis or reactive inflammation after an injury. Here, cortisone’s rapid anti-inflammatory effect makes it the more appropriate short-term choice. It can get pain under control quickly so that rehabilitation and recovery can begin.
Other cases involve chronic tendon and joint conditions, such as knee osteoarthritis, patellar tendinopathy, rotator cuff tendinopathy, Achilles tendinopathy, or lateral epicondylitis. For these, PRP tends to offer more meaningful and longer-lasting results. Multiple clinical studies have shown PRP to be superior to cortisone at six and twelve months in conditions like knee osteoarthritis and chronic tendinopathy. This held true even when cortisone produced better results at the one-month mark.
In other words: cortisone often wins in the short term; PRP tends to win over time.
The Risk of Over-Relying on Cortisone
One concern with repeated cortisone use — particularly in tendons — is the potential for structural weakening. Cortisone can reduce collagen synthesis, which means tendons that are repeatedly injected may become more susceptible to rupture. For active patients, athletes, or anyone hoping to stay mobile and pain-free long term, this is an important consideration.
PRP carries no such risk. Because it works by stimulating the body’s natural repair processes rather than suppressing them, it does not weaken tissue. In fact, improved collagen organisation and tendon structure have been documented in studies following PRP treatment.
Can PRP and Cortisone Be Used Together?
In some cases, yes — though not simultaneously. Cortisone can be used first to bring severe inflammation under control. A PRP injection may then follow some weeks later, once the cortisone effect has subsided. Your treating practitioner will assess whether a staged approach is appropriate for your particular injury and presentation.
Making the Right Choice for Your Condition
Both treatments have their place in orthopaedic care. The key is matching the right treatment to the right patient at the right time. Several factors influence the decision. These include the type and severity of the condition, how long it has been present, previous treatments, and your goals for recovery and activity.
A thorough clinical assessment — including a review of imaging where appropriate — is essential before committing to either approach.
If you are based in Sydney’s north-west (Castle Hill, Norwest, Kellyville, Baulkham Hills, Pennant Hills) or the Southern Highlands (Bowral, Mittagong, Moss Vale), book a consultation with Dr John PRP to discuss which treatment approach is best suited to your condition and goals.
For further reading, visit the Healthdirect Australia overview of PRP therapy.
