Anti-Inflammatory Medications (NSAIDs)
Nonsteroidal anti-inflammatory drugs (NSAIDs), including medications such as ibuprofen and naproxen, can reduce pain and improve function in people with knee osteoarthritis. They are recommended in major osteoarthritis guidelines for short-term symptom management when medically appropriate. However, these medications do not restore cartilage or reverse osteoarthritis.
At Arc of Life Medical Center, we do not prescribe oral or topical NSAIDs as part of our knee osteoarthritis treatment approach. NSAIDs work by blocking cyclooxygenase (COX) enzymes and reducing prostaglandin production—pathways that are involved not only in pain and inflammation, but also in normal tissue-repair processes.
Research has raised concerns about NSAID use in certain healing environments. A systematic review of cartilage-repair research found that NSAIDs can affect chondrocyte differentiation and osteochondral graft incorporation and concluded that NSAID use after cartilage-repair procedures should generally be avoided unless the clinical benefit outweighs the concern. Most of this evidence, however, comes from laboratory and animal studies, so it should not be interpreted as proof that routine NSAID use causes cartilage loss in every patient with osteoarthritis.
There are similar concerns in other musculoskeletal tissues. A review of tendon, ligament, labrum, and meniscus healing found evidence that COX-2–selective NSAIDs can negatively affect some soft-tissue healing processes, while evidence for nonselective NSAIDs was less consistent. The authors emphasized that more high-quality human studies are needed.
NSAIDs are also particularly relevant when platelet-rich plasma (PRP) is being considered. Human studies show that nonselective NSAIDs can reduce platelet aggregation, and systematic reviews have raised concern that this could interfere with platelet activation and growth-factor release that PRP depends on.
NSAIDs can reduce symptoms, but they do not restore the joint, and because they interfere with inflammatory and platelet pathways involved in tissue repair, we do not routinely use them as part of our knee osteoarthritis treatment strategy.
Our approach emphasizes understanding what is driving the knee problem and using strategies aimed at improving movement, function, strength, joint loading, and appropriate tissue recovery rather than relying on ongoing anti-inflammatory medication for symptom control.
If you are already taking an NSAID prescribed or recommended by another healthcare professional, do not stop it solely because of this information. Medication decisions should be discussed with the clinician managing your medications.
Research Highlight
A 2022 systematic review examining medications before PRP treatment found that nonselective NSAIDs significantly reduced platelet aggregation, while COX-2–selective NSAIDs did not show the same effect. The authors recommended considering suspension of nonselective NSAIDs before PRP because of their potential to diminish platelet function.
A separate systematic review evaluating cartilage repair found potential adverse effects of NSAIDs on chondrogenesis and graft incorporation, although the evidence consisted primarily of laboratory and animal research rather than large human clinical trials.
References:
1. Kao DS, Zhang SW, Vap AR. (2022). “A Systematic Review on the Effect of Common Medications on Platelet Count and Function: Which Medications Should Be Stopped Before Getting a Platelet-Rich Plasma Injection?” Orthopaedic Journal of Sports Medicine.
DOI: 10.1177/23259671221088820
2. Merkely G, Chisari E, Rosso CL, Lattermann C. “Do Nonsteroidal Anti-Inflammatory Drugs Have a Deleterious Effect on Cartilage Repair? A Systematic Review.” Cartilage.
DOI: 10.1177/1947603519855770
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