# PRP vs cortisone: one works sooner and one takes time

*PRP vs Cortisone for Joint Soreness | PRP Glendale*

> PRP vs cortisone explained simply: cortisone may work sooner, while blood-based PRP may take longer to judge. Learn what a visit should cover.

Cortisone often starts easing swelling within days. The slower shot uses platelet-rich plasma, or PRP, prepared by spinning drawn blood and saving its platelet-heavy layer.

## Cortisone usually brings the earlier relief

Cortisone is a strong medicine that calms swelling around a joint or tendon. Relief can begin within days, then fade over the next few months.

That speed may matter before travel, work, or an event with much walking. It doesn’t make repeat shots the right answer for everyone.

Say how long earlier shots helped and how often soreness returned. Those details show more than a broad claim that one treatment is better.

## PRP takes longer to judge

The blood treatment is called PRP, short for platelet-rich plasma. Staff spin the drawn blood and save a liquid holding extra platelets.

At a cut, those platelets gather and begin the repair response. A provider puts the concentrated liquid through a needle into the sore joint, or beside the tendon causing trouble.

For several days, you may feel more soreness where the shot went. Knee studies often check relief several months later, so the first week tells little.

Some knee groups felt better than cortisone groups after several months. Yet a large test found PRP and salt-water groups felt about the same after twelve months.

## The better choice depends on timing and the exam

Quick relief may matter most when daily movement has become hard. Slower care may appeal after cortisone relief has faded several times.

Neither shot helps every cause of soreness, so the exam still matters. Ask what caused the soreness, when relief might begin, and when to check again.

The visit should cover physical therapy, a brace, and lighter activity too. Those choices can help alongside either shot and may be enough alone.

## Sources

1. A Bayesian network meta-analysis restricted to LARGE randomized trials (at least 100 patients per group; 57 trials, 22,795 participants, 18 intra-articular interventions) found treatment effects were larger in the 35 high-risk-of-bias trials than in the 22 low/unclear-risk trials. Excluding high-risk trials, the effects of 16 of the 18 intra-articular interventions in knee or hip OA were smaller than the minimal clinically important difference and most were consistent with placebo effects; triamcinolone had the highest probability of exceeding the MID at weeks 2-6.
   Pereira TV, Saadat P, Bobos P, et al. — [Effectiveness and safety of intra-articular interventions for knee and hip osteoarthritis based on large randomized trials: A systematic review and network meta-analysis](https://pubmed.ncbi.nlm.nih.gov/39265924/). *Osteoarthritis and Cartilage*, 2025. DOI: 10.1016/j.joca.2024.08.014.
2. A meta-analysis of 11 randomized trials (730 patients) with lateral epicondylitis found corticosteroid better than PRP in the short term (under 2 months) on VAS pain (MD 0.93; 95% CI 0.42-1.44) and DASH (MD 10.23; 95% CI 9.08-11.39), while PRP was better in the long term (6 months or more) on VAS (MD -2.18; 95% CI -3.13 to -1.22), DASH (MD -8.13) and Mayo Elbow Performance Score (MD 16.53). The two treatments trade places over time rather than one dominating.
   Xu Y, Li T, Wang L, et al. — [Platelet-Rich Plasma Has Better Results for Long-term Functional Improvement and Pain Relief for Lateral Epicondylitis: A Systematic Review and Meta-analysis of Randomized Controlled Trials](https://pubmed.ncbi.nlm.nih.gov/38357713/). *American Journal of Sports Medicine*, 2024. DOI: 10.1177/03635465231213087.
3. A meta-analysis of eight studies (648 patients, mean age 59) judged at low risk of bias found PRP significantly better than intra-articular corticosteroid for knee OA symptoms at 3, 6 and 9 months (P<0.01), with the largest effects at 6 months (SMD -0.78; 95% CI -1.34 to -0.23) and 9 months (SMD -1.63; 95% CI -2.14 to -1.12). This is the strongest available case for PRP as a longer-acting alternative to a steroid shot.
   McLarnon M, Heron N — [Intra-articular platelet-rich plasma injections versus intra-articular corticosteroid injections for symptomatic management of knee osteoarthritis: systematic review and meta-analysis](https://pubmed.ncbi.nlm.nih.gov/34134679/). *BMC Musculoskeletal Disorders*, 2021. DOI: 10.1186/s12891-021-04308-3.
4. In a randomized comparative trial of chronic severe recalcitrant plantar fasciitis, the corticosteroid group's mean AOFAS score rose from 52 to 81 at three months but fell back to 58 at 12 months and 56 at 24 months, while the PRP group rose from 37 to 95 at three months and held at 92 at 24 months. The pattern - steroid relief that fades, PRP relief that persists - is the clearest single illustration of the durability difference.
   Monto RR — [Platelet-rich plasma efficacy versus corticosteroid injection treatment for chronic severe plantar fasciitis](https://pubmed.ncbi.nlm.nih.gov/24419823/). *Foot & Ankle International*, 2014. DOI: 10.1177/1071100713519778.
5. A randomized double-blind trial of 80 patients with chronic gluteal tendinopathy (lateral hip pain) compared a single ultrasound-guided PRP injection with a single corticosteroid injection. At 12 weeks the PRP group had significantly better modified Harris Hip Scores (P=.048), and 82% versus 56.7% of patients reached the minimal clinically important difference (P=.016).
   Fitzpatrick J, Bulsara MK, O'Donnell J, et al. — [The Effectiveness of Platelet-Rich Plasma Injections in Gluteal Tendinopathy: A Randomized, Double-Blind Controlled Trial Comparing a Single Platelet-Rich Plasma Injection With a Single Corticosteroid Injection](https://pubmed.ncbi.nlm.nih.gov/29293361/). *American Journal of Sports Medicine*, 2018. DOI: 10.1177/0363546517745525.
6. In the RESTORE trial - the largest placebo-controlled PRP trial in knee osteoarthritis - 288 adults aged 50+ with symptomatic Kellgren-Lawrence grade 2-3 medial knee OA received three weekly intra-articular injections of leukocyte-poor PRP from a commercial system or saline placebo. At 12 months the mean change in knee pain was -2.1 points with PRP versus -1.8 with saline (difference -0.4; 95% CI -0.9 to 0.2; P=.17) against a minimum clinically important difference of 1.8, and the change in medial tibial cartilage volume was -1.4% versus -1.2% (difference -0.2%; 95% CI -1.9% to 1.5%; P=.81). Twenty-nine of 31 prespecified secondary outcomes showed no significant between-group difference. The authors concluded the findings do not support use of PRP for knee OA.
   Bennell KL, Paterson KL, Metcalf BR, et al. — [Effect of Intra-articular Platelet-Rich Plasma vs Placebo Injection on Pain and Medial Tibial Cartilage Volume in Patients With Knee Osteoarthritis: The RESTORE Randomized Clinical Trial](https://pubmed.ncbi.nlm.nih.gov/34812863/). *JAMA*, 2021. DOI: 10.1001/jama.2021.19415.
7. A meta-analysis of 34 randomized trials (1403 PRP knees, 1426 control knees) found WOMAC favoured PRP over placebo at 12 months (P=.02) and over hyaluronic acid at 6 and 12 months (P<.001), and favoured PRP over steroids on VAS pain and KOOS at 6 months. Critically, the authors reported that the superiority of PRP did NOT reach the minimal clinically important difference for any outcome, and graded the quality of evidence as low.
   Filardo G, Previtali D, Napoli F, et al. — [PRP Injections for the Treatment of Knee Osteoarthritis: A Meta-Analysis of Randomized Controlled Trials](https://pubmed.ncbi.nlm.nih.gov/32551947/). *Cartilage*, 2021. DOI: 10.1177/1947603520931170.
8. In a 2-year double-blind randomized trial, intra-articular triamcinolone every 12 weeks produced significantly greater cartilage volume loss than saline (mean change in index compartment cartilage thickness -0.21 mm versus -0.10 mm; between-group difference -0.11 mm; 95% CI -0.20 to -0.03) and no significant difference in knee pain (-1.2 versus -1.9). The authors concluded the findings do not support this treatment for symptomatic knee osteoarthritis - which is the honest reason a patient may want an alternative to repeat steroid shots.
   McAlindon TE, LaValley MP, Harvey WF, et al. — [Effect of Intra-articular Triamcinolone vs Saline on Knee Cartilage Volume and Pain in Patients With Knee Osteoarthritis: A Randomized Clinical Trial](https://pubmed.ncbi.nlm.nih.gov/28510679/). *JAMA*, 2017. DOI: 10.1001/jama.2017.5283.
9. The devices used to spin PRP at the point of care are cleared by FDA as clinical centrifuges, product code JQC, a Class I device under 21 CFR 862.2050 - for example the Biomet GPS Platelet Separation Kit (K030555, cleared 2003) and the Harvest SmartPrep2 / SmartPrep Platelet Concentration System (K103340, cleared 2010). That clearance covers the equipment that separates blood. It is not an FDA approval of platelet-rich plasma as a treatment for osteoarthritis, tendinopathy or any other orthopedic condition, and copy must never blur the two.
   U.S. Food and Drug Administration (Center for Devices and Radiological Health) — [510(k) Premarket Notification database and Product Classification: JQC, Centrifuges (Micro, Ultra, Refrigerated) For Clinical Use, 21 CFR 862.2050](https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfPCD/classification.cfm?ID=JQC). *FDA accessdata (CDRH device databases)*, 2003.

## A visit begins with an exam of the sore joint

QC Kinetix offers consultations and regenerative treatments, meaning non-surgical blood care prepared on site and intended to support the body’s repair response after an exam.

Book a free consultation: <https://prp.qckaz.com/?src=prpglendale.com>

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What may ease the soreness and when an exam helps.

Help for knee, shoulder, hip, elbow, heel, or ankle soreness in Glendale, with home care, visit timing, PRP, cortisone, costs, and nearby clinics.

Plain Glendale guidance about joint soreness, home care, visits, and treatment choices.

This site is operated by the owners of the QC Kinetix clinics serving the Phoenix area, including the Peoria and Banner Estrella offices these pages send readers to, so read it as first-party writing from a business that benefits when you book - and check the sources for yourself.

Copyright 2026 The Glendale Injection Desk. General education about joint and tendon injections, not medical advice about your own joint; talk to a clinician who can examine it.