Steroid Knee Injection Safety and Efficacy

Common Local Side Effects

Post-injection pain flare occurs commonly, with injection-site soreness reported in approximately 9% of patients, according to the American Academy of Physical Medicine and Rehabilitation 1
Vasovagal reactions occur in approximately 2.5% of patients, manifesting as dizziness, lightheadedness, or syncope, as reported by the American Academy of Physical Medicine and Rehabilitation 1
Facial flushing and sweating are steroid-specific side effects occurring in approximately 1.6% of patients, typically resolving within 24-48 hours, according to the American Academy of Physical Medicine and Rehabilitation 1

Increased deep infection risk after total knee replacement has been reported when steroids are administered within 3 months before surgery, with all three deep infections in one study occurring in patients who received pre-operative injections, as noted by the American College of Surgeons 2
Both injections should be avoided within 3 months prior to knee replacement surgery due to potential infection risk, as recommended by the American College of Surgeons 2

Transient hyperglycemia occurs commonly in diabetic patients, requiring glucose monitoring for 1-3 days post-injection, according to the American Diabetes Association 2

Immunosuppressed patients face substantially elevated infection risks, including rare cases of epidural abscess, meningitis, and endocarditis, as reported by the American Academy of Physical Medicine and Rehabilitation 1
Diabetic patients require specific counseling about hyperglycemia and glucose monitoring, as recommended by the American Diabetes Association 2

Short-term efficacy is well-established, with significant pain relief lasting 1-4 weeks, though some patients experience benefits up to 12 weeks, according to the European League Against Rheumatism 3
Medicare typically limits injections to no more frequently than every 3 months for the same joint, as noted by the Centers for Medicare and Medicaid Services 2