PRP vs. Corticosteroid Injections for Knee Pain: What’s the Difference?
If you’ve been living with knee pain from osteoarthritis or a soft tissue injury, you’ve likely been offered — or have heard of — two very different types of injections: corticosteroids (“cortisone shots”) and Platelet-Rich Plasma (PRP). Both go into the same joint, but they
work in fundamentally different ways, and understanding that difference matters for choosing the right option.
How Corticosteroid Injections Work
Corticosteroids are powerful anti-inflammatory medications. Injected into a painful joint, they reduce inflammation quickly and can bring significant short-term relief — often within days.
Where they fall short: the relief is typically temporary, lasting weeks to a few months. Corticosteroids don’t repair tissue or address the underlying degeneration — they calm the symptoms without treating the cause. Repeated steroid injections have also been associated with potential cartilage effects over time, which is why most guidelines recommend limiting how often they’re used in the same joint.
How PRP Works
PRP is prepared from your own blood. A sample is drawn and processed to concentrate the platelets, which contain growth factors involved in the body’s natural healing response. When injected into the joint, PRP is intended to support tissue healing and modulate inflammation, rather than simply suppressing it.
What to expect: PRP tends to work more gradually than a steroid shot — relief often builds over several weeks rather than appearing overnight — but for many patients the benefit lasts longer. Because it uses your own blood components, the safety profile is generally favourable, with a low risk of allergic reaction.
So Which Is Right for You?
This depends on your specific diagnosis, the stage of your joint disease, and your treatment goals:
- Corticosteroids may make sense for a short-term flare, or when quick relief is the priority (for example, ahead of a specific event).
- PRP is often considered for patients looking for a longer-term, disease-modifying approach, particularly earlier in the course of osteoarthritis.
Neither option is universally “better” — the right choice depends on an accurate diagnosis and a clear conversation about what you’re trying to achieve. This is exactly the kind of decision that benefits from a structured clinical evaluation rather than a one-size-fits-all approach.
If you’re weighing your options for knee pain, book a consultation to discuss which approach fits your specific case.
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