Written and medically reviewed by David Nazarian, MD — Board Certified in Internal Medicine and Medical Director of PRP Treatment Beverly Hills. Last medically reviewed: October 2026.
Quick answer: PRP and corticosteroid injections are not interchangeable. Corticosteroid injections can reduce inflammation and pain relatively quickly in selected conditions, while PRP is an autologous platelet-based treatment with a different mechanism and a slower, less predictable response. Which option makes sense depends on the diagnosis, treatment goal, evidence for that condition, and the patient’s medical history.
How PRP and cortisone differ
| Feature | PRP | Corticosteroid injection |
|---|---|---|
| What is injected? | Platelet-rich plasma prepared from the patient’s blood | Anti-inflammatory corticosteroid medication |
| Main goal | Investigational biologic modulation of local tissue response | Reduce inflammation and pain |
| Onset | Usually gradual if benefit occurs | Often faster symptom relief |
| Evidence | Varies substantially by diagnosis | Established for selected inflammatory and musculoskeletal uses |
| Durability | Condition-dependent and uncertain | May be temporary; repeated use requires clinical judgment |
What does the evidence show?
For knee osteoarthritis, recent systematic reviews of randomized trials suggest both PRP and corticosteroid injections can improve symptoms, with some analyses reporting more sustained improvement after PRP. However, PRP preparations, injection schedules, and study methods vary, and this does not mean PRP is superior for every joint or tendon problem.
What about tendon injuries?
The answer depends on the tendon. Corticosteroid injections may provide short-term pain relief in some conditions but can have limitations with repeated use around certain tendons. PRP evidence is mixed and condition-specific. For lateral epicondylitis, for example, recent placebo-controlled evidence has not shown a consistent benefit from PRP.
When might cortisone be preferred?
A corticosteroid injection may be considered when rapid anti-inflammatory symptom relief is appropriate and the expected benefit outweighs the risks. The underlying diagnosis, tissue being injected, frequency of prior injections, diabetes, infection risk, and other factors matter.
When might PRP be discussed?
PRP may be discussed when evidence supports its use for the specific condition, conservative care has not been sufficient, and the patient understands that benefit is not guaranteed. I prefer to compare PRP with the best-established alternatives rather than present it as a universally more “natural” or superior injection.
Related: How I decide whether PRP is worth doing, PRP knee injections, and PRP for tendon and sports injuries.
