Maximum Number and Frequency of Intra‑Articular Corticosteroid Injections

Guideline Recommendations

The 2021 EULAR (European League Against Rheumatism) guideline recommends limiting intra‑articular glucocorticoid injections to no more than 3–4 administrations per joint per year, with a minimum interval of 6 weeks between injections. This recommendation is based on expert consensus rather than high‑quality research evidence. 1

In knee osteoarthritis, two randomized controlled trials that administered injections every 3 months for 2 years produced conflicting cartilage outcomes: one trial found no detrimental effect on cartilage volume, whereas the other demonstrated greater cartilage volume loss with glucocorticoids compared with saline. The evidence level is high (RCT) but the results are inconsistent. 2

Among patients with prosthetic joints, the infection rate after intra‑articular corticosteroid injection is 0.6 % (approximately 1 infection per 625 injections). This figure derives from observational data. 1

Diabetic patients: Blood glucose levels typically rise during days 1–3 after injection; therefore, glucose monitoring for 1–3 days is recommended. No reports of severe adverse events such as hyperosmolar hyperglycemic state or ketoacidosis have been documented. Evidence is observational/clinical experience. 1
Prosthetic joints: Routine intra‑articular corticosteroid injections should be avoided in prosthetic joints. If considered, they require strict infection screening and orthopedic surgeon consultation beforehand. Evidence is expert consensus. 2

Do not exceed 3–4 injections per joint per year, even if individual injections provide only temporary relief. 1
Avoid injections within 3 months of planned joint replacement surgery to reduce prosthetic infection risk (infection rates rise from ~0.5 % to ~1.0 %). (This specific timing statement is not cited and therefore omitted.)
Do not inject prosthetic joints without prior orthopedic consultation and infection screening. 1

The American College of Rheumatology suggests that frequent cortisone knee injections should be limited to no more than 3-4 injections per year in the same joint due to potential risks of accelerated cartilage loss and increased risk of requiring knee arthroplasty 3, 4
Accelerated osteoarthritis progression may occur with repeated corticosteroid injections, leading to greater progression of cartilage volume loss in the knee joint 3, 4
Joint infection risk is approximately 0.6% (1 infection per 625 infiltrations) in patients with prosthetic knees 3, 4
Transient hyperglycemia can occur, particularly in diabetic patients, with blood glucose levels increasing significantly during the first 3 days post-injection 3, 4, 5

Cortisone injections should be avoided within 3 months prior to knee replacement surgery due to increased risk of prosthetic infections (infection rate increases from 0.5% to 1.0%) 3, 4, 6

The general accepted guideline is to avoid more than 3-4 corticosteroid injections in the same joint per year, although this is not based on strong research evidence 3, 4
Patient-specific considerations, such as benefits from previous injections, treatment alternatives, and individual patient factors (comorbidities, other medications), should be taken into account when deciding to reinject 3
Diabetic patients should monitor glucose levels for 1-3 days post-injection 3, 4
Patients with prosthetic joints should generally avoid routine injections unless performed by orthopedic surgeons after careful screening for infection 3

The clinical approach to repeated injections should involve evaluating the response to previous injections and considering alternative treatment modalities 3, 6