A randomized controlled trial published in JAMA Psychiatry found that stellate ganglion block reduced PTSD symptom severity significantly compared to a sham procedure — a result that has drawn serious attention from both military medicine and civilian clinical practice. For veterans who have cycled through medications and therapy without adequate relief, that finding represents something worth understanding in detail. At Oasis Therapeutics, we offer stellate ganglion block (SGB) at our Nashua and Concord, New Hampshire clinics, administered by board-certified physicians with backgrounds in anesthesiology and pain management, at a veteran-owned practice built specifically for this population.
What Is the Stellate Ganglion?
The stellate ganglion is a collection of nerve cell bodies located in the neck, on either side of the voice box. It is part of the sympathetic nervous system — the branch of the autonomic nervous system responsible for the body’s fight-or-flight response. Under normal circumstances, the sympathetic nervous system activates in response to threat and deactivates once the threat has passed. In PTSD, that deactivation fails to happen reliably, leaving the nervous system in a state of chronic overactivation.
This sustained activation drives many of the hallmark symptoms of PTSD: hypervigilance (a heightened state of alertness to potential threat), intrusive memories, exaggerated startle responses, difficulty sleeping, and the persistent sense of danger even in objectively safe environments. Understanding the role of the sympathetic nervous system in these symptoms is central to understanding why SGB may be an effective intervention.
How Stellate Ganglion Block Works
SGB involves the injection of a local anesthetic — a medication that temporarily blocks nerve signal transmission — near the stellate ganglion. By quieting the activity of these nerves, the procedure can reduce the chronic sympathetic overactivation that underlies trauma-related symptoms. Research suggests this effect may be related to the block’s influence on nerve growth factor (NGF) activity in the brain, which is thought to contribute to the persistence of PTSD symptoms over time.
The procedure is performed under imaging guidance — either fluoroscopy (real-time X-ray) or ultrasound — to ensure precise placement of the needle. At Oasis Therapeutics, SGB is administered by our physician team with specialized training in interventional procedures. Imaging guidance is not optional in our practice; it is standard.
The procedure itself typically takes approximately 20 minutes. Patients are awake throughout and do not require general anesthesia or sedation. Most patients are able to return to their normal activities the same day, with minimal downtime.
What the Research Shows
The evidence base for SGB in PTSD has grown substantially in recent years, with several peer-reviewed studies contributing to the clinical picture. The JAMA Psychiatry randomized controlled trial — considered one of the strongest study designs in clinical research — found that SGB produced statistically significant reductions in PTSD symptom severity compared to patients who received a sham injection (JAMA Psychiatry). This level of evidence distinguishes SGB from anecdotal reports; it has been tested under controlled conditions with a comparison group.
Additional peer-reviewed research supports SGB as an effective treatment option for PTSD, including for patients with treatment-resistant presentations who have not responded adequately to first-line approaches (National Institutes of Health). Studies have also examined the effect of repeated SGB administration, with findings suggesting that some patients benefit from more than one injection spaced over time.
The neurological rationale for SGB’s effects in PTSD involves the amygdala — the brain region centrally involved in processing fear and stress responses, and one of the structures most consistently implicated in PTSD (National Institutes of Health). By modulating the sympathetic nervous system, SGB is understood to reduce the excessive fear-signaling that sustains PTSD symptoms over time.
It is worth stating clearly: SGB is not a cure, and results vary by individual. Not every patient experiences the same degree of benefit, and some may require additional sessions or complementary treatments to achieve meaningful improvement. We discuss this honestly with every patient before treatment begins.
What to Expect at Oasis Therapeutics
The consultation: Every patient begins with a thorough evaluation with our physician team. We review your full medical and psychiatric history, your prior treatment experiences, and your current symptoms. This evaluation determines whether SGB is clinically appropriate for your situation — not every patient is a candidate, and we will tell you directly if we believe a different approach is more suitable.
The procedure: On the day of treatment, you will be positioned on your back with your neck slightly extended. Imaging guidance is used to identify the precise injection site. A local anesthetic is administered to the skin surface, and the physician then guides the needle to the stellate ganglion and delivers the anesthetic solution. The procedure takes approximately 20 minutes. You will remain in the clinic briefly afterward for monitoring before being cleared to leave.
After the procedure: Common temporary effects include a sensation of warmth in the arm on the treated side, a slightly hoarse voice, and a drooping of the eyelid on the treated side — these are expected signs that the block has taken effect and typically resolve within a few hours. Serious complications are rare when the procedure is performed under imaging guidance by an experienced physician.
Follow-up: Some patients experience significant relief after a single injection. Others benefit from a series of injections over several weeks or months. Our team follows up with you to assess your response and adjust the treatment plan accordingly. We also offer specialized care for veterans and first responders that goes beyond a single procedure, coordinating comprehensive support tailored to this community.
Addressing Two Common Concerns
“I’ve been dealing with this for years — is it too late?” The duration of PTSD symptoms does not determine whether SGB will be effective. Many of the patients who come to us have been managing trauma-related conditions for years, often after multiple unsuccessful treatment attempts. A long history of PTSD is not a contraindication to SGB; in many cases, it is precisely the kind of treatment-resistant presentation the procedure was studied in.
Cost and insurance: SGB coverage varies by insurance plan and the condition being treated. Our care coordination team verifies your specific coverage before treatment is scheduled, so you know your out-of-pocket costs before you commit to anything. For patients whose plans do not cover SGB, we offer discounted direct-payment rates and financing through CareCredit. HSA and FSA funds are eligible.
Frequently Asked Questions
How quickly does stellate ganglion block work for PTSD? Some patients report noticeable changes within hours to days of the procedure. Others experience a more gradual reduction in symptoms over the weeks following treatment. The timeline varies by individual, and your response to the first injection helps guide decisions about whether additional sessions are appropriate.
Is stellate ganglion block the same as a nerve block for pain? SGB uses the same basic technique as other nerve block procedures — a precisely placed injection of local anesthetic near a nerve cluster — but its application for PTSD is distinct in its target and its proposed mechanism. Traditional nerve blocks for pain typically target peripheral nerves to interrupt pain signal transmission. SGB targets the sympathetic nervous system’s influence on brain function.
Do I need to stop my current medications before SGB? This is determined during your consultation based on your specific medications and medical history. Some medications may need to be adjusted around the procedure; others do not. We review all current medications as part of the evaluation process.
Can SGB be combined with other treatments? Yes. SGB is not a standalone protocol for most patients — it works best as part of a comprehensive treatment plan that may include ketamine infusion therapy, TMS, or ongoing psychiatric care. We discuss combination approaches during the evaluation and build a plan based on your individual presentation.
Is SGB only for combat-related PTSD? No. While the research base includes a significant proportion of military veterans, SGB is clinically appropriate for PTSD arising from any traumatic experience, including first responder incidents, assault, accidents, or other events. The underlying neurobiology being addressed is the same regardless of the source of trauma.
Key Takeaways
- Stellate ganglion block (SGB) is a minimally invasive procedure that targets the sympathetic nervous system and has demonstrated significant reductions in PTSD symptom severity in a JAMA Psychiatry randomized controlled trial.
- The procedure involves a precisely placed injection of local anesthetic near the stellate ganglion — a nerve cluster in the neck — under imaging guidance, and takes approximately 20 minutes.
- At Oasis Therapeutics, SGB is administered by board-certified physicians with specializations in anesthesiology and pain management, using imaging guidance as standard practice.
- SGB is most effective as part of a broader treatment plan; it may be combined with ketamine infusion therapy, TMS, or other clinical approaches depending on the individual patient’s needs.
- Results vary by individual. A thorough clinical evaluation is required before treatment, and we verify insurance coverage before anything is scheduled.
PTSD is a neurobiological condition, not a failure of toughness — and SGB is a clinical intervention with a real and growing evidence base that addresses that condition at its physiological roots. If you are a veteran or first responder in the Nashua or Concord area and want to understand whether SGB is appropriate for your situation, we welcome that conversation. Schedule a consultation through our website to request an evaluation. We encourage you to discuss all treatment options with your healthcare providers as you make these decisions.
References
JAMA Psychiatry. Effects of Stellate Ganglion Block on PTSD Symptoms. https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2753810
National Institutes of Health. Stellate Ganglion Block for PTSD. https://pmc.ncbi.nlm.nih.gov/articles/PMC6865253/
National Institutes of Health. Fear, Stress, and the Amygdala. https://pmc.ncbi.nlm.nih.gov/articles/PMC2882379/
Medical Disclaimer
The information in this blog is for educational purposes only and does not constitute medical advice. Stellate ganglion block and all other treatments described should only be pursued under the supervision of a licensed provider familiar with your full medical and psychiatric history. Individual results vary. Not all treatments are appropriate for all patients. If you are experiencing a mental health crisis or thoughts of self-harm, please call or text 988 to reach the Suicide and Crisis Lifeline or go to your nearest emergency room.