PRP vs cortisone injections: a plain comparison

Cortisone acts faster, but PRP tends to hold its benefit longer. In our guides, this is often the next question readers ask after ruling out stem cell therapy because of the cost. Neither option is a cure, and neither has been proven to repair the underlying joint damage. In practice, the choice comes down to cost, timing, trial evidence, and the safety of repeat treatments, trade-offs worth weighing rather than guessing about.

PRP vs Cortisone at a Glance

The table below covers the criteria that actually change the decision between PRP and cortisone injections.

The pattern: cortisone is the cheaper, faster, insurance-friendly option, and it is genuinely FDA-approved as a drug, just used off-label for many of the joints it treats. PRP costs more and takes longer to kick in, but the trial data shows it holding its benefit past the point where cortisone typically fades.

What Each Injection Is

PRP and cortisone are built from completely different material, and that difference explains almost everything else about cost, timing, and risk.

PRP is platelet-rich plasma. A provider draws your blood, spins it in a centrifuge, and concentrates the platelets before re-injecting them into the joint. Platelets release growth factors, the signaling proteins your body uses in healing. PRP does not contain any drug.

Cortisone is a corticosteroid, a lab-made version of a hormone your adrenal glands already produce. Injected into a joint, it shuts down local inflammation quickly. Triamcinolone, one of the corticosteroids clinics commonly inject into joints, is an FDA-approved medicine in its own right. The drug itself is approved. Using it in a given joint for arthritis pain is typically the off-label part. The FDA has not approved any PRP product for joint use at all.

The Cost Gap Between PRP and Cortisone

Cortisone is the cheaper option by a wide margin, and it’s usually the one your insurance pays for. A single cortisone shot typically runs $100 to $500, and most health plans cover it as standard orthopedic care.

A PRP course costs more. Budget $500 to $2,500 for a course of one to three sessions, all of it typically out of pocket, because PRP remains an off-label, FDA-unapproved use for joints. Our PRP injection cost guide breaks the price down by body area.

Run the math for your case before you choose. Three cortisone shots at $300 each over two years costs $900. One PRP course at $1,500 costs more upfront, but if it holds for a year where cortisone would have needed a repeat shot at month four, the totals get closer than the sticker prices suggest.

Faster Relief vs Longer-Lasting Relief

The evidence splits cleanly along a timeline. A 2025 systematic review of randomized trials comparing PRP and corticosteroid injections for knee osteoarthritis found six trials with 36 to 80 patients each and follow-up out to 24 months.

Cortisone won the short game. One trial in that review showed cortisone reaching its maximum pain relief at one month, while PRP took closer to three months to reach its own peak. For someone who needs to walk down the aisle at a wedding in two weeks, that speed matters most.

PRP won the long game in most of the same trials. The review’s authors describe PRP as outperforming cortisone in long-term pain reduction, while cortisone’s benefit commonly faded after about 15 weeks. A separate meta-analysis of 14 randomized trials covering 1,512 patients found no PRP advantage over hyaluronic acid at one month, but a meaningful gap by 12 months, a similar early-flat, later-diverging pattern to what shows up against cortisone.

Not every trial agreed. One study in the systematic review found no significant difference between PRP and cortisone even at 24 months. That trial is the exception. Most of the reviewed trials still show PRP pulling ahead by 12 months.

How Often You Can Safely Repeat Each

Both injections carry a mild, well-documented safety profile for a single shot. The real difference shows up with repeated use over time.

PRP’s side effects are limited mostly to injection-site soreness for a day or two, since the material is your own blood. Because nothing foreign goes in, there’s no meaningful ceiling on how often you can repeat it, beyond the cost.

Cortisone’s short-term profile is also mild: injection-site pain, a temporary blood-sugar bump, occasional flushing. The concern is cumulative. The Arthritis Foundation cites two to three cortisone shots a year in the same joint as a reasonable ceiling, and notes that repeated shots can thin the cartilage and weaken nearby tendons and ligaments over time. No study sets a firm lifetime limit, which is exactly why most orthopedists track how many shots a given joint has already had.

Who This Is Not For

PRP is a poor fit if you need relief within days, since the reported timelines put its peak effect around three months. It’s also the wrong choice if a full course is genuinely unaffordable, since insurance rarely pays for it. If you’re on a blood thinner or have an active infection near the injection site, most providers will decline PRP until that clears.

Cortisone is the wrong choice if you’ve already had two or three shots in the same joint this year, given the cartilage-thinning concern. It’s also a weak fit for anyone chasing a result that outlasts a few months, since the trial data consistently shows its benefit fading faster than PRP’s.

What Would Change This Answer

A large, well-controlled trial showing no long-term PRP advantage would flatten this whole comparison back to “cortisone is cheaper and just as good,” since the durability edge is PRP’s main argument for the extra cost. On the other side, a documented case of serious cartilage loss tied to a single cortisone shot, rather than years of repeated ones, would push the safety math further toward PRP even for a first injection. Neither has happened yet in the literature reviewed here.

A Simple Way to Decide

Match the injection to your actual timeline and budget. Do not match it to whichever one a clinic promotes hardest.

1. Need relief within days? Cortisone is the only one of the two built for that timeline.
2. Already had two cortisone shots in this joint this year? That’s the Arthritis Foundation’s own ceiling. PRP is the lower-risk repeat option.
3. Insurance won’t cover an out-of-pocket course? Cortisone’s coverage advantage may decide it for you regardless of the evidence.
4. Chasing an effect that lasts past three to four months? The trial data favors PRP on duration, even though it costs more upfront.
5. Undecided after those four? Ask your provider to walk through your specific joint’s imaging and history before you pick, since neither injection is proven to fix the underlying damage either way.

A Common Mistake with Cortisone Specifically

The failure mode we see most often with cortisone is not a single bad shot. It’s losing count. A patient gets one shot from an orthopedist in January, then a second from a physical therapist’s referring physician in June, then a third from an urgent-care clinic in November for an unrelated flare, and nobody along the way tracked that it was the same knee three times in one year. Each individual clinician saw a reasonable request. The joint received the Arthritis Foundation’s full annual ceiling without anyone noticing.

The fix is simple. Keep your own running count per joint, by year, and tell every new provider what that joint has already had before they draw up a shot. If you’re already at two or three for the year and the pain is back, that’s the point to ask about PRP instead of a fourth cortisone injection. Don’t wait for a clinician to tell you the joint “can’t take any more” before you raise it.

The Bottom Line on PRP vs Cortisone

Cortisone is the faster, cheaper, better-covered option for a flare that needs fixing this week. PRP costs more and takes longer to build, but the trial data shows it holding its edge past the point where cortisone typically fades. Neither is FDA-approved specifically for this joint use in PRP’s case, and neither reverses the underlying arthritis or damage causing the pain. Price your specific joint with the cost estimator, count how many cortisone shots that joint has already had this year, and choose the injection that matches your actual timeline rather than the one a clinic pushes hardest.