The verdict
A cortisone shot suits a flare that needs fast relief, such as an inflamed bursa or an arthritic knee before a trip, where a few weeks of calm is the goal. It suits repeated use poorly, and it is generally avoided in certain tendons. PRP suits a chronic tendon problem or early to moderate arthritis in a man who can wait weeks for a response, wants to avoid repeated steroid exposure and is ready to pair the injection with rehab.
The two are not mutually exclusive over time, but they pull in different directions: cortisone suppresses inflammation, while PRP tries to use part of the healing response.
Side-by-side comparison
| Cortisone shot | PRP injection | |
|---|---|---|
| What is injected | A corticosteroid, usually with a numbing medicine | A concentrate of your own platelets |
| How fast it works | A few days | Several weeks, building over months |
| How long relief lasts | Several weeks | Months in responders; varies by condition |
| Repeat limits | Often 3 to 4 a year in practice | No fixed limit; usually one or a short series |
| Tendon concerns | Rupture risk; generally avoided in biceps, patellar and Achilles tendons | No known weakening effect |
| Strongest evidence | Short-term pain relief | Chronic tennis elbow |
| Insurance | Commonly covered | Few plans reimburse |
How each one works
Cortisone is a synthetic version of a stress hormone that switches off inflammation. Injected into a joint, bursa or the tissue around a tendon, it quiets swelling and pain. The AAOS guide to cortisone shots explains that the steroid takes a few days to kick in, which is why a numbing agent is usually mixed in, and that relief can last several weeks.
PRP comes from a small blood draw spun in a centrifuge to concentrate platelets. Their growth factors are meant to prompt repair in tissue that has stopped healing, such as a degenerated tendon. Because it works through the body’s repair process, the response is slower and depends on loading the tissue properly afterward.
That difference shapes what happens after each injection. After cortisone, men often feel well enough to go straight back to the activity that caused the problem, which can set up the next flare. After PRP, the usual plan is a short period of relative rest followed by a structured return to strength work, so the tendon is loaded in a way that encourages it to remodel rather than simply rested until the next setback.
What trials show in tennis elbow and knee arthritis
Tennis elbow is where the two have been tested most directly. In a JAMA trial of chronic tennis elbow, patients given a cortisone shot did worse at one year than those given a placebo injection: 83% versus 96% reported complete recovery or much improvement, and 54% versus 12% had a recurrence. In a head-to-head trial, 73% of PRP patients met the success threshold at one year compared with 49% given cortisone. The cortisone group felt better first, then declined, while the PRP group improved steadily.
Knee arthritis is less clear-cut. The AAOS PRP guide reports growing support for PRP in low- to moderate-grade knee osteoarthritis, with some results lasting up to two years. But the RESTORE trial, the largest placebo-controlled study so far with 288 patients, found PRP no better than saline for pain or cartilage at 12 months. On the steroid side, a two-year trial of repeated knee injections every 12 weeks found more cartilage loss than saline and no difference in pain. That makes PRP a reasonable option to discuss for knee arthritis, not a sure thing.
Side effects and limits
The AAOS lists infection and tendon tears among the risks of cortisone, notes that clinicians often set a practical limit of 3 to 4 shots a year, and advises that cortisone generally should not be used for tendinitis in the biceps, patellar or Achilles tendons because of rupture risk. Men with diabetes may also see a temporary rise in blood sugar after a steroid shot.
PRP’s most common side effect is extra pain at the injection site, which can feel worse than the original problem for a few days. The AAOS notes that other risks, such as infection or nerve injury, appear similar to those of a cortisone shot. Because PRP uses your own blood, allergic reactions to the injected material are not expected.
Cost and convenience
Cortisone wins on convenience and cost. It is a quick office injection that many insurance plans cover. PRP adds a blood draw and processing time, and the AAOS notes that few insurance plans reimburse it, so most men pay directly. The longer-term math can look different when cortisone shots keep being repeated. Our page on PRP injection cost for joints and tendons lists what drives the price.
How Ultimate Male evaluates joint and tendon pain
Cortisone injections are not part of Ultimate Male’s service menu, so the clinic will not offer you one, but your provider will tell you honestly if a steroid shot from your primary care or orthopedic clinician looks like the better short-term fit. What the clinic does offer is a PRP injection service that covers tendon, joint and soft-tissue problems. The visit takes under an hour, numbing is used, and the blood draw, processing and injection all happen in the same appointment.
Whether your particular joint or tendon is one the clinic treats, and whether imaging or a specialist opinion should come first, is settled at the evaluation with a PA-C or MD. Start with a free 10-minute call and describe where it hurts and what you have tried. The PRP for tendon and joint repair page explains the visit, and our BPC-157 vs PRP comparison covers the peptide question. If knee pain and weight are tangled together, see knee pain and excess weight.
