Do steroid injections really work for Sciatica?

For decades, steroid injections have been a common treatment option for people struggling with sciatica. When pain shoots from the lower back down the leg, many patients are offered an epidural steroid injection in the hope of reducing inflammation and easing symptoms.

However, a new French study published in September 2026 is challenging that approach and raising an uncomfortable question: Are steroid injections actually any better than a placebo?

What Is Sciatica?

Sciatica is not a condition itself but a symptom caused by irritation or compression of the sciatic nerve, often due to a lumbar disc herniation. Common symptoms include:

• Pain radiating from the lower back into the buttock and leg
• Tingling or pins-and-needles sensations
• Numbness
• Muscle weakness
• Difficulty sitting, standing or walking comfortably

While many cases improve over time, severe symptoms can have a major impact on work, sleep, mobility and quality of life.

Because inflammation around the affected nerve is believed to contribute to pain, corticosteroid injections have long been used in an attempt to provide relief.

The Study

Researchers at Université de Nantes conducted a prospective, randomized, placebo-controlled, double-blind trial involving 106 adults with sciatica caused by a lumbar disc herniation that had been present for less than three months. Participants were randomly assigned to receive either:

• A caudal epidural injection containing dexamethasone (a corticosteroid), or
• A saline placebo injection.

Importantly, neither the patients nor the investigators assessing outcomes knew which treatment participants had received, making this one of the strongest study designs available.

What Did They Find?

The results were surprising.

At three weeks, the steroid group did not show significantly better improvement in disability scores compared with the placebo group. The primary study endpoint failed to demonstrate a meaningful advantage for dexamethasone over saline.

Researchers also found no significant differences in:

• Leg pain
• Low back pain
• Quality of life measurements
• Need for additional injections
• Likelihood of surgery during follow-up

Even after six months, outcomes remained remarkably similar between the two groups.

The researchers concluded that caudal dexamethasone injections provided no clinical benefit over saline placebo for acute sciatica.

An Interesting Finding About Side Effects

While serious complications were not reported, mild and temporary adverse effects occurred more frequently in the steroid group.

This is significant because one of the main arguments for trying steroid injections is that they may provide meaningful symptom relief with relatively low risk. If benefits are minimal or absent, even small additional risks become harder to justify.

What Does This Mean for Patients?

This study does not prove that all steroid injections are ineffective for all forms of sciatica. It focused specifically on:

• Acute sciatica
• Lumbar disc herniation
• Caudal epidural dexamethasone injections

Different patients, different techniques, or different steroid formulations may produce different outcomes.

However, the findings add to a growing body of evidence suggesting that the benefits of epidural steroid injections may be smaller than many people assume.

A separate September 2026 systematic review found that while one injection approach may provide a modest short-term advantage, differences between techniques largely disappear after a few months.

The Bigger Picture

For many people with sciatica, recovery may depend less on injections and more on a comprehensive approach that can include:

• Appropriate physical activity
• Targeted exercise programs
• Ergonomic workplace adjustments
• Postural support
• Weight management where appropriate
• Education and self-management strategies
• Medical review for persistent or worsening symptoms

Research continues to show that there is rarely a single “magic bullet” for back pain or sciatica. Instead, successful long-term management often involves addressing multiple factors that influence pain and function.

What Should You Do If You’re Considering an Injection?

If your healthcare provider has recommended a steroid injection, this study should not be viewed as a reason to automatically reject treatment. Rather, it highlights the importance of having an informed discussion about:

• Expected benefits
• Potential risks
• Alternative treatment options
• The likelihood of natural recovery
• Whether the injection is intended for short-term symptom management or longer-term improvement

The best treatment decision will always depend on the individual patient, the cause of the symptoms and the clinical advice of their healthcare team.

Final Thoughts

This well-designed French trial delivered a clear message: in patients with recent sciatica caused by lumbar disc herniation, dexamethasone epidural injections performed no better than saline placebo across multiple important outcomes.

While steroid injections will likely remain part of the treatment toolbox, studies like this remind us that common treatments should continually be tested against the evidence. Sometimes the results challenge long-held assumptions, and ultimately that leads to better care for patients.

Sources

1. No Efficacy of Dexamethasone Injections for Acute Sciatica: A Double-Blind Randomized Study Versus Saline. European Journal of Pain, September 2026.
   View study on PubMed [pubmed.ncb…lm.nih.gov]
2. Route or Reach? Caudal Epidural Versus Nerve-Root-Targeted Injection for Lumbar Radiculopathy: A Systematic Review of Randomized Controlled Trials. European Spine Journal, September 2026.
   View study on PubMed [pubmed.ncb…lm.nih.gov]