Do hyaluronic acid injections relieve OA knee pain?
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Hyaluronic acid (HA) injections relieve pain more than placebo. The effect is small but similar to results from oral nonsteroidal anti-inflammatory drugs (NSAIDs) or steroid injection (strength of recommendation ([SOR]: B, conflicting meta-analyses). The various HA products all appear to be equally effective in reducing pain (SOR: B, randomized clinical trials [RCTs]). Data concerning the effect of HA on functional ability are conflicting.
Journal of Family Practice, 58(5) 2009: 281c-281e.