Steroid Injection Side Effects: What the Evidence Shows

This covers what the peer-reviewed literature actually shows about local joint and soft-tissue effects, systemic and endocrine effects, the specific avascular necrosis risk, and what a hospital should track when corticosteroid injections are part of routine orthopaedic or pain-management practice.

What local side effects does a steroid injection carry at the injection site?

Local corticosteroid injection side effects include post-injection flare, skin hypopigmentation and atrophy, infection, tendon rupture, accelerated cartilage thinning and osseous injury, according to a 2023 review published in the American Journal of Roentgenology. These effects are specific to the injected site and distinct from any systemic absorption.

Repeated joint injections carry cumulative local risk: thinning of joint cartilage, weakening of the ligaments around the joint, and increased intra-articular inflammation from a reaction to crystallised corticosteroid have all been documented with repeat dosing at the same site. Skin hypopigmentation is more visually apparent and more frequently reported in patients with darker skin tones, which is a documented reporting bias worth accounting for in patient counselling.

Tendon rupture is an uncommon but recognised local complication, reported more often with injections placed close to weight-bearing tendons such as the Achilles, which is one reason injection technique and site selection matter as much as the drug itself in determining local risk.

Does a steroid injection cause avascular necrosis?

Avascular necrosis, also called osteonecrosis, is a rare but serious documented complication of intra-articular corticosteroid injection, with case reports describing rapid-onset avascular necrosis of the hip following even a single injection. This is not a common outcome, but it is a real one that changes the risk calculus for repeat dosing into weight-bearing joints specifically.

The mechanism is thought to involve disrupted blood supply to bone, compounding whatever baseline vascular risk factors (smoking, alcohol use, corticosteroid use from other sources) a patient already carries. A hospital tracking steroid injection outcomes should flag any joint pain or restricted range of motion that develops weeks to months after an injection for follow-up imaging, rather than dismissing it as expected post-injection soreness.

What systemic side effects follow a steroid injection?

Systemic corticosteroid injection side effects include adrenal suppression or insufficiency, facial flushing, hypertension, hyperglycemia and osteoporosis, arising from drug absorbed from the injection site into general circulation rather than staying localised. These effects scale with injection frequency, dose and the specific corticosteroid formulation used.

A statistically significant decrease in femoral bone mineral density has been documented after a single epidural steroid injection in postmenopausal women, with the effect shown to be dose-dependent in peer-reviewed research. This finding is specific to a vulnerable population already at elevated fracture risk, making bone density a relevant consideration before repeat epidural dosing in postmenopausal patients.

Adrenal suppression from repeated systemic absorption is typically transient and reverses once dosing stops, but a patient receiving frequent injections across multiple joints or sites over a short period can accumulate a systemic dose comparable to an oral corticosteroid course without anyone tracking it as such.

How does steroid injection affect blood sugar in diabetic patients?

Corticosteroid injections, including intra-articular and epidural routes, can cause transient hyperglycemia in patients with diabetes by inducing insulin resistance and increasing hepatic glucose output, even though the injection is localised rather than systemic in intent. The degree and duration of glucose elevation depends on the corticosteroid used and the injected dose reaching systemic circulation.

A hospital administering steroid injections to a known diabetic should build in a period of post-injection glucose monitoring rather than treating the injection as glucose-neutral simply because it isn't an oral or IV systemic steroid course. This is a documented, dose-related effect, not a rare idiosyncratic reaction, and the monitoring window typically needs to cover several days rather than just the hours immediately after the procedure.

Are NSAID injections a safer alternative to steroid injections for joint pain?

A systematic review comparing NSAID injections to corticosteroid injections for musculoskeletal pain found insufficient high-quality evidence to establish NSAID injections as a clearly safer or more effective alternative across indications. The evidence base for NSAID injections as a substitute remains thinner than the decades of corticosteroid injection data.

This means the choice between the two isn't a settled substitution question answerable in general terms; it depends on the specific joint, indication and patient risk profile, and belongs with the treating clinician rather than a blanket recommendation either way. A hospital formulary stocking both options should treat them as distinct clinical tools rather than interchangeable substitutes pending stronger comparative evidence.

What should a hospital track when corticosteroid injections are routine practice?

A hospital running an orthopaedic or pain-management practice with regular corticosteroid injections should maintain a per-patient injection log recording site, formulation, dose and date, specifically because both local and systemic risk are cumulative and dose-dependent rather than triggered by any single injection in isolation. Without that log, a patient who develops avascular necrosis or bone density loss months later can't be traced back to the injection history that likely contributed.

That same injection log depends on the hospital's own pharmacy reliably stocking and dispensing the corticosteroid formulation used, rather than the drug being sourced ad hoc from whichever outside chemist happens to have it in stock that day. When a prescribed corticosteroid isn't available in-house, the prescription, and the dosing record tied to it, walks out with the patient. Medyzen's managed hospital pharmacy services are built around exactly this kind of reliable in-house stocking and record continuity, and our piece on prescription leakage covers what that walk-out costs a hospital in both revenue and clinical follow-up. Our pharmacy inventory management guide covers the batch-tracking discipline that keeps a per-patient injection log accurate over time.

Sources

1. 1Local and Systemic Side Effects of Corticosteroid Injections for Musculoskeletal Indications — American Journal of Roentgenology, PubMed, 2023
2. 2Accelerated avascular necrosis after single intra-articular injection of corticosteroid into the hip joint — National Institutes of Health, National Library of Medicine
3. 3Side effects of corticosteroid injections: what's new? — PubMed, National Library of Medicine
4. 4Are non-steroidal anti-inflammatory drug injections an alternative to steroid injections for musculoskeletal pain?: A systematic review — National Institutes of Health, National Library of Medicine
5. 5Central Drugs Standard Control Organisation — Drugs and Cosmetics Act, 1940 and Rules, 1945

This article is for informational purposes and is not a substitute for professional medical advice. It summarises peer-reviewed evidence on corticosteroid injection side effects for clinical reference; it is not a recommendation for or against any specific injection or patient. Consult the treating clinician for any individual case.