PRP vs. Hyaluronic Acid for Hip Arthritis: Which Injection Works Better?
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By Dr. Jeffrey Peng, MD · Published March 6, 2025 · 5 min read
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Hyaluronic acid injections and PRP therapy are two of the most effective non-surgical treatments for hip osteoarthritis. Both have been shown to reduce pain and improve function — but is one better than the other? And if both work, does combining them into a single injection produce even better results?
A recently published randomized clinical trial directly compared PRP alone, hyaluronic acid alone, and the two combined in patients with hip arthritis (Nouri et al., 2022). The findings offer clear guidance for patients and clinicians weighing these options.
What Did the Study Compare?
This randomized clinical trial enrolled 92 patients with mild to moderate hip osteoarthritis and assigned them to one of three groups: PRP alone, hyaluronic acid alone, or PRP combined with hyaluronic acid. Each patient received two ultrasound-guided injections spaced two weeks apart.
In the PRP group, 35 cc of blood was drawn and concentrated down to 5 cc of PRP, yielding an average of roughly 7 billion platelets per injection. No activating agents were added. The hyaluronic acid group received a high molecular weight preparation, and the combination group received both injections administered sequentially in the same session.
Outcomes were measured at 2 months and 6 months using validated hip pain and function questionnaires including the WOMAC, visual analog scale, and Lequesne index.
Does PRP Work Better Than Hyaluronic Acid for Hip Arthritis?
All three groups showed meaningful improvements in pain and function at both 2 months and 6 months compared to baseline. This is consistent with existing evidence that both hyaluronic acid and PRP are effective treatments for hip osteoarthritis.
However, when the groups were compared head-to-head, both the PRP group and the PRP-plus-HA group showed significantly better outcomes than hyaluronic acid alone. Specifically, patients receiving PRP had superior results on the WOMAC and Lequesne disability scores at the 6-month mark. The improvements from PRP appeared to be more durable, with therapeutic effects lasting through the full follow-up period.
This finding aligns with the broader body of evidence. Multiple randomized controlled trials and systematic reviews have now concluded that PRP injections are superior to hyaluronic acid injections for reducing symptoms related to hip osteoarthritis.
Does Combining PRP and Hyaluronic Acid Give Better Results?
Because PRP and hyaluronic acid work through different biological mechanisms, many clinicians have theorized that combining them would produce synergistic effects. This is why some physicians routinely add hyaluronic acid to PRP at the time of injection.
The results of this trial do not support that practice. When the PRP-only group was compared to the PRP-plus-HA group, there were no significant differences in any outcome measure. Adding hyaluronic acid to PRP at the time of injection provided no additional benefit in pain, function, or disability scores.
The authors concluded that PRP is superior to HA for improving function and disability related to hip osteoarthritis, and that adding HA to PRP at the time of injection does not improve outcomes.
Why Cortisone Injections Are the Worst Option for Hip Arthritis
While hyaluronic acid may not match PRP in head-to-head comparisons, it is still far preferable to cortisone injections for hip osteoarthritis. Research has demonstrated that even a single corticosteroid injection into the hip can significantly increase the risk of developing rapidly progressive idiopathic arthritis — a condition where the joint deteriorates at an accelerated rate.
A controlled cohort study of 1,471 patients who received fluoroscopically guided hip corticosteroid injections found that approximately 7 percent developed rapidly progressive arthritis of the hip (Boutin et al., 2021). Risk factors included older age, pre-existing joint space narrowing, and more advanced osteoarthritis at the time of injection.
For this reason, in my practice I generally advise patients with hip arthritis to avoid cortisone injections and consider PRP or hyaluronic acid as safer and more effective alternatives.
How to Use PRP and Hyaluronic Acid Together Strategically
Although combining PRP and HA in the same injection session does not improve outcomes, that does not mean there is no role for both treatments in a long-term management plan. The key is to space them out rather than administer them together.
For patients who can afford multiple PRP injections throughout the year, PRP alone may be sufficient. However, for many patients — particularly those whose insurance covers hyaluronic acid — it makes sense to take advantage of that covered benefit as maintenance therapy between PRP treatments.
For example, if you are receiving PRP injections once every 6 to 12 months, you might consider adding hyaluronic acid injections at the 3-month and 9-month marks. The purpose of this staggered approach is to maintain a healthier joint environment throughout the year. One of the reasons osteoarthritis progressively worsens is the ongoing release of inflammatory cytokines and destructive enzymes into the joint. By spacing out PRP and HA treatments, the goal is to reduce chronic inflammation and protect remaining cartilage.
Injections Are Just One Part of the Equation
It is important to remember that injections — whether PRP, hyaluronic acid, or any other — are only one component of a comprehensive approach to hip osteoarthritis. Exercise therapy is equally important, if not more so, for maintaining joint function, strengthening the surrounding musculature, and slowing disease progression.
If you have hip arthritis, I recommend combining any injection protocol with a targeted exercise program to achieve the best possible outcomes. Consider scheduling a consultation to develop a personalized treatment plan.
References
1. Nouri F, Babaee M, Peydayesh P, Esmaily H, Raeissadat SA. Comparison between the effects of ultrasound guided intra-articular injections of platelet-rich plasma (PRP), high molecular weight hyaluronic acid, and their combination in hip osteoarthritis: a randomized clinical trial. BMC Musculoskelet Disord. 2022;23(1):856. doi:10.1186/s12891-022-05787-8
2. Boutin RD, Pai J, Meehan JP, Newman JS, Yao L. Rapidly progressive idiopathic arthritis of the hip: incidence and risk factors in a controlled cohort study of 1471 patients after intra-articular corticosteroid injection. Skeletal Radiol. 2021;50(12):2449-2457. doi:10.1007/s00256-021-03815-7
Medical Disclaimer: This content is for educational purposes only and does not substitute for the medical advice of a physician. Always consult your healthcare provider before beginning any new treatment program. The information presented reflects the opinion of Dr. Jeffrey Peng and does not represent the views of his employers or affiliated hospital systems.
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