Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/23/2025

Monovisc Intra-articular Injection for Knee Osteoarthritis

Evidence Against Viscosupplementation

  • The 2019 American College of Rheumatology/Arthritis Foundation guidelines conditionally recommend against intra-articular hyaluronic acid injections in patients with knee osteoarthritis 1, 2
  • When limited to trials with low risk of bias, meta-analysis has shown that the effect size of hyaluronic acid injections compared to saline injections approaches zero 2

Treatment Algorithm for Knee Osteoarthritis

First-Line Treatments

  • Land-based exercise (aerobic and/or resistance) is recommended for patients with knee osteoarthritis 4
  • Weight loss is recommended for overweight patients with knee osteoarthritis 4
  • Physical therapy is recommended for patients with knee osteoarthritis 1, 5
  • Knee bracing is recommended when appropriate for patients with knee osteoarthritis 4, 5
  • Acetaminophen (up to 3g daily in divided doses) is recommended for patients with knee osteoarthritis 4, 6
  • Oral NSAIDs are recommended for patients with knee osteoarthritis 4, 6
  • Topical NSAIDs are recommended, particularly for patients ≥75 years old with knee osteoarthritis 4, 7

Second-Line Treatments

  • Intra-articular corticosteroid injections are strongly recommended for knee OA, but typically provide only short-term relief 4, 6, 8
  • Intra-articular hyaluronic acid (including Monovisc) is not recommended due to limited evidence of benefit and potential harm 1, 2, 3

Clinical Considerations

  • The American Academy of Orthopaedic Surgeons recommends arthroscopic surgery for patients with meniscal tears and knee osteoarthritis who have failed conservative treatments 5
  • The American College of Rheumatology recommends shared decision-making for patients with knee osteoarthritis who have had an inadequate response to nonpharmacologic therapies, topical and oral NSAIDs, and intraarticular steroids 2, 4, 8

REFERENCES