If you are comparing PRP vs. cortisone injections, the most important thing to understand is that they do different jobs.
Cortisone is a powerful anti-inflammatory. It can reduce pain quickly, but the effect is temporary, and repeated injections can expose local tissues to additional steroid-related risks. PRP, or platelet-rich plasma, is prepared from your own blood and is intended to support the body’s healing response rather than simply suppress inflammation. PRP has shown benefit for a number of tendon and joint conditions, including osteoarthritis in selected patients. It generally takes longer to work and is usually not covered by insurance.
For patients who want a biologic treatment made from their own blood and are looking beyond short-term suppression of inflammation, PRP may be the more appealing option. Cortisone still has a role when rapid short-term relief is the primary goal, but the choice should be based on the diagnosis and what the treatment is expected to accomplish.
What Is a Cortisone Injection?
Cortisone is a corticosteroid medication delivered directly to the painful area. When inflammation is driving the pain, a cortisone injection can reduce symptoms substantially within a few days. Relief may last anywhere from several weeks to several months.
One of the most useful roles of cortisone is helping a patient begin rehabilitation. If a painful shoulder or knee makes physical therapy difficult, an injection may reduce the pain enough to create a window for treatment. In that situation, the cortisone injection provides short-term relief, while physical therapy is what produces the more durable improvement.
Learn more about cortisone injections.
What Is a PRP Injection?
PRP stands for platelet-rich plasma. During the procedure, a small amount of your blood is drawn and placed in a centrifuge. This separates and concentrates the platelets, which are then injected into the injured or painful area.
Platelets contain growth factors involved in the body’s healing response. The goal of PRP is to influence the local healing environment instead of only reducing inflammation.
PRP preparations can differ in platelet concentration and whether white blood cells are included, so the treatment is not identical from one system to another. Those differences matter because platelet dose and preparation method can influence the biologic product delivered to the injured area.
Learn more about whether PRP injections are worth it.
PRP vs. Cortisone Injections: Key Differences
How quickly do they work?
Cortisone usually begins working within a few days. PRP generally takes several weeks, and some patients experience a temporary increase in soreness after the injection.
How long do the results last?
Cortisone provides temporary relief. Repeat cortisone injections do not work as effectively as the initial injection and can cause irreparable tissue damage.
PRP improvement usually develops more gradually, but when it helps, the benefit may last longer because the treatment is intended to support the body’s healing response rather than provide short-term anti-inflammatory suppression.
How do they work?
Cortisone suppresses inflammation. PRP is intended to influence the body’s healing response.
Which has stronger evidence?
Cortisone has a long history of use and strong evidence for short-term relief of inflammatory pain. PRP has evidence supporting its use in several chronic tendon conditions and in osteoarthritis, with results varying according to the joint, severity of disease, and PRP preparation.
How much do they cost?
Cortisone injections are generally covered by insurance when medically appropriate. PRP injections are usually not covered and are typically paid for out of pocket.
Can the injections be repeated?
Cortisone injections into the same area are deliberately spaced and limited because repeated steroid exposure can affect tendon, cartilage, and other local tissues. PRP can be repeated without the negative effects associated with cortisone injections.
Where Cortisone Still Has a Role
A cortisone injection may still be useful when:
- The pain is clearly being driven by inflammation
- You need relief quickly
- Pain is preventing you from beginning physical therapy
- A specific flare needs to be brought under control
- A rapid, short-term reduction in inflammation is the primary treatment goal
- The injection is being used as a short-term bridge to make rehabilitation possible
Cortisone can be useful as a short-term part of a larger treatment plan, particularly when reducing inflammation makes rehabilitation possible. Repeat cortisone injections do not work as effectively as the initial injection and can cause irreparable tissue damage, so cortisone is generally not viewed as a long-term regenerative strategy.
When PRP May Be the Better Long-Term Option
PRP may be especially worth discussing when:
- A tendon problem has not improved with physical therapy and activity modification
- Cortisone helped previously, but the relief is wearing off more quickly each time
- You want to avoid repeated steroid injections into the same area
- You have osteoarthritis, including bone-on-bone arthritis, and want to discuss whether PRP may help reduce pain and improve function
- You can accept a slower onset of relief
- You understand that insurance may not cover the procedure
- You prefer a treatment made from your own blood rather than repeated corticosteroid medication
PRP is particularly appealing to patients looking for a more natural, biologic approach that uses their own blood, platelets, and growth factors to help improve their condition. It does not have the same negative effects associated with cortisone injections. Whether it is appropriate still depends on the diagnosis, the tissue involved, and the severity of the underlying condition.
What Neither Injection Can Do
Neither cortisone nor PRP can regrow lost cartilage or repair a full-thickness tendon tear.
If the underlying problem is structural, such as a large rotator cuff tear, advanced arthritis, or mechanical instability, an injection may reduce pain temporarily but will not correct the structure itself. It may be reasonable to use an injection to manage symptoms or buy time, but it should not be expected to replace treatment for the actual problem.
Repeated corticosteroid injections into the same area are approached cautiously because steroid exposure can adversely affect local tendon and cartilage, and repeated injections may provide diminishing relief. PRP can be repeated without the negative effects associated with cortisone injections.
How to Choose Between PRP and Cortisone
The most useful question is not, “Which injection is better?” It is, “What is causing the pain, and what treatment is most likely to change it?”
Once there is an accurate diagnosis, the choice between PRP and cortisone is often much clearer. If both injections are reasonable options, the decision usually comes down to several trade-offs:
- How quickly you need relief
- Whether the pain is primarily inflammatory or related to a chronic tendon problem
- How long the benefit may last
- Whether you want to avoid repeated steroid exposure
- Whether you prefer a biologic treatment or short-term medication-based relief
- Whether the injection is being used alone or as part of rehabilitation
Those trade-offs should be considered with your physician based on your diagnosis, medical history, and treatment goals.
Frequently Asked Questions
Is PRP better than cortisone?
PRP is often the more attractive option for patients who want a biologic treatment made from their own blood and are seeking a potentially longer-lasting improvement rather than short-term anti-inflammatory relief. Cortisone usually works faster, but its benefit is temporary and repeated injections can expose local tissues to steroid-related effects.
The decision still depends on the diagnosis and treatment goals, but cost alone is not a reason to choose cortisone when PRP is otherwise the more appropriate treatment.
Can you have PRP after a cortisone shot?
Usually, yes. However, physicians will typically leave a gap between a cortisone injection and PRP treatment. Tell your physician about any recent steroid injections so the timing can be planned appropriately.
How many cortisone shots can you have?
There is no single fixed number that applies to every patient or every part of the body. Injections into the same area are deliberately spaced and limited because repeat cortisone injections do not work as effectively as the initial injection and can cause irreparable tissue damage.
If you need cortisone injections frequently, that is usually a reason to reconsider the underlying problem and the broader treatment plan rather than simply scheduling another injection.
Does insurance cover PRP?
Generally, no. PRP is typically an out-of-pocket treatment, so it is important to confirm the cost before proceeding. Cortisone injections are usually covered by insurance when medically appropriate.
How long does it take for PRP to work?
PRP typically takes 8 weeks to 6 months rather than days to work. When improvement occurs, it often builds over approximately 2 to 6 months. Some patients experience a temporary increase in soreness during the first few days after the injection.
Does PRP work for arthritis?
PRP has been shown to even help patients with bone-on-bone arthritis. PRP does not regrow cartilage or reverse established structural damage.
Can PRP or cortisone replace physical therapy?
Usually not. An injection may reduce pain enough to make physical therapy possible, but it does not replace the strength, mobility, and movement improvements that rehabilitation is designed to produce.
Talk With an Orthopedic Specialist
If you are trying to decide between PRP and cortisone injections, or wondering whether either treatment is appropriate, an evaluation can identify what is actually causing the pain and what options are most likely to help.
Call 916-732-3005 or request an appointment.
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