By: Alena Wiese
Summary: A double-blind trial of 106 patients, published in the European Journal of Pain in September 2026, found that a caudal epidural injection of dexamethasone did not outperform a saline placebo for recent-onset sciatica. The result joins a growing international body of evidence that favors careful evaluation and conservative care as the starting point.
The pain started two weeks ago, a sharp line running from the lower back into the calf, and now a person sits in an exam room asking the question heard in clinics from Orlando to Paris: would a shot help? Epidural steroid injections are one of the most familiar options offered for sciatica worldwide, and many people assume they are the fast track.
A new trial from France suggests the answer is less certain than that. For people with sciatica from a disc herniation that began less than three months earlier, an ultrasound-guided caudal injection of the steroid dexamethasone produced no measurable advantage over an injection of plain saline. Patients in both groups improved on average, which points to the natural course of acute sciatica and to how much of early recovery may happen with or without the drug.
The study, known as DEXHIA and led by researchers at the University Hospital of Nantes, appeared in the September 2026 issue of the European Journal of Pain. It randomized 106 adults, 53 to each group, and followed them for six months.
Does A Steroid Injection Help Acute Sciatica?
In this trial, it did not help more than a placebo. The primary goal was a change in the Oswestry Disability Index, a standard questionnaire about how back and leg pain limit daily life, three weeks after the injection. Disability scores fell by an average of 9.5 points in the dexamethasone group and 13.8 points in the saline group, a difference that was not statistically significant (p = 0.18).
No meaningful differences appeared in any relevant secondary outcome at three weeks, three months, or six months. Those outcomes included leg pain, back pain, quality of life, the need for another injection, and the need for surgery.
The dexamethasone group received 16 mg of the drug diluted in saline; the placebo group received 20 mL of saline alone. Over six months, 34 patients in the steroid group and 30 in the placebo group went on to receive a second, unblinded dexamethasone injection. Ten people in the steroid group and nine in the placebo group had lumbar surgery. Side effects of the injection were mild and short-lived, but they were more common in the steroid group. The trial was registered in advance with ClinicalTrials.gov (NCT05000658).
Source: No Efficacy of Dexamethasone Injections for Acute Sciatica: A Double-Blind Randomized Study Versus Saline, European Journal of Pain, September 2026.
What Does This Trial Not Tell Us?
It does not show that every epidural injection is useless for every person with sciatica. The study tested one drug, one dose, and one route, the caudal approach through the base of the spine, in people whose symptoms were less than three months old. Other routes and other patient groups were not studied.
With 106 participants, the trial was modest in size, and saline injected into the epidural space may not be a truly inactive treatment, since the volume of fluid itself could have an effect. Many patients in both groups also went on to a second, open-label steroid injection, which makes the six-month comparison harder to read. The results come from a single French university hospital system and may not match every setting.
What the trial does add is a clean, placebo-controlled answer to a narrow question, and that answer was no.
Why Are Researchers Around The World Rethinking Sciatica Treatment?
The rethink is driven partly by scale and partly by evidence. The World Health Organization reports that low back pain affected 619 million people worldwide in 2020, is projected to reach 843 million cases by 2050, and is the single leading cause of disability on the planet. WHO describes spine-related leg pain as a dull ache or a sharp, electric shock feeling, sometimes with numbness, tingling, or muscle weakness. With that many people affected, the cost of treatments that do not outperform placebo adds up quickly.
A second new paper shows how thin some of the comparison data remain. A meta-analysis from Houston Methodist Hospital, published Aug. 21, 2026, in Frontiers in Pain Research, pooled 31 studies with 2,452 patients with lumbar radiculopathy, the medical term for sciatica-type nerve pain. It found that transforaminal injections, placed beside the nerve root, produced greater short-term pain relief than interlaminar injections placed from the back. But every included comparison pitted one injection technique against another. None compared injections with placebo, exercise or other conservative care, and the authors flagged high heterogeneity and a lack of dose standardization.
In the United Kingdom, the National Institute for Health and Care Excellence, which updated its low back pain and sciatica guideline in 2026, advises considering manual therapy only as part of a treatment package that includes exercise.
Source: Effectiveness of epidural steroid injections in the treatment of lumbar radiculopathy: a systematic review and meta-analysis, Frontiers in Pain Research, August 2026.
Source: Low back pain fact sheet, World Health Organization, June 2023.
When Is Conservative Care The Wrong Choice For Sciatica?
Conservative care is the wrong first step when symptoms suggest serious nerve compression or another serious disease. Leg weakness that is new or getting worse, a foot that drags or slaps, trouble controlling the bladder or bowels, and numbness in the saddle area between the legs are reasons for same-day medical care. Back and leg pain with fever, unexplained weight loss, a history of cancer, or recent major trauma should also prompt a visit to a physician promptly. These signs are uncommon, but they are the reason every plan should start with an exam rather than a guess.
Where Do Orlando And Kissimmee Residents Fit Into This?
Locally, the same questions come up in South Orange and Osceola counties. ReliefNow Laser Orlando, at 4170 Town Center Blvd., Suite 100, in Orlando, serves patients from Orlando and Kissimmee and can be reached at 407-857-6166. Its chiropractors include Dr. Jeffrey N. Shebovsky, DC, who founded Orange Wellness in 1994 and holds Florida chiropractic license CH6499, along with Dr. Fernando Fernandez and Dr. Kurt Virgin.
Dr. Shebovsky’s background includes more than 30 years in practice, a Doctor of Chiropractic degree earned with honors from New York Chiropractic College, and a clinical focus that includes disc-related conditions. In a practice built on that model, the first visit centers on a history and a physical and neurological exam to judge whether leg pain behaves like an irritated nerve root, a hip or joint problem, or something that needs a physician. People with red flags are referred out rather than treated.
When conservative care does fit, progress is measured against a baseline, often with the same kind of disability questionnaire the French trial used, along with pain ratings and sitting and walking tolerance. If those numbers are not moving over several weeks, the plan is revisited, and outside referral is considered.
What Should A Person With New Sciatica Take From This Research?
The main takeaway is that recent-onset sciatica often improves over time, and that a procedure is not automatically faster or better. The DEXHIA findings do not settle every question about injections, and they are not a reason to ignore severe or worsening symptoms. They do offer useful context for a conversation with a clinician about what to try first, what to watch for, and how progress will be judged. For many people, that conversation, grounded in a careful exam, may be the most valuable part of early care.
About: Dr. Jeffrey N. Shebovsky, DC | ReliefNow® Laser Orlando | 4170 Town Center Blvd., Suite 100, Orlando, FL 32837 | 407-857-6166 |
Disclaimer: This article is for informational and educational purposes only and is not intended to provide medical advice, diagnosis, or treatment. Consult a qualified healthcare provider before beginning any treatment program.
