A 2024 comprehensive review found SGB efficacy for PTSD symptoms ranges from 70–83% of treated patients achieving clinically significant positive outcomes across the full range of existing studies
Stellate Ganglion Block in The Woodlands, TX: Rapid Relief for PTSD, Anxiety, and Trauma
Twenty-eight thousand acres, 120,000 residents, a forest canopy that was preserved before a single home was built, and a community designed from the first shovel stroke to be the best version of what a planned community could be. The Woodlands doesn’t do things halfway. That same standard — methodical, evidence-based, quality-over-speed — applies to the mental health decisions that residents here make. If PTSD, chronic anxiety, or trauma-related dysregulation has been the problem that careful, systematic treatment hasn’t fully solved, stellate ganglion block offers a biologically direct intervention now recognized by behavioral health clinicians as performing at the level of the field’s highest-rated standard treatments. Dr. Ho, board-certified anesthesiologist and former pediatrician, performs this ultrasound-guided procedure at Catalyst Health & Wellness for Woodlands residents and patients from Spring, Conroe, Shenandoah, Tomball, and north Houston. Three Houston locations, open 5am–9pm, seven days a week.
Woodlands Clinicians Trust This Treatment
The Woodlands attracts physicians, executives, energy professionals, and specialists — people who evaluate treatments based on what the evidence says, not what the marketing says. Here’s what the most current evidence about SGB says from the perspective of the clinicians who have used it clinically with their own patients.
A 2024 study published in BMJ Open by Kirkpatrick and colleagues surveyed behavioral health clinicians — psychologists, psychiatrists, licensed counselors, and social workers — who had direct, first-hand experience using SGB in their clinical practice. The finding was striking: these clinicians, drawing on actual patient outcomes rather than published trials, rated SGB as “at least as useful as the highest rated standard interventions for the treatment of PTSD.” That’s not a pharmaceutical company claim or a research optimist’s projection. It’s a clinical judgment from practitioners who had tried SGB with their patients, compared the results to every other tool in their toolkit, and reached a conclusion. For The Woodlands’ evaluative, skeptical, high-standard community, that kind of on-the-ground clinical signal is precisely the evidence worth paying attention to.
The mechanism behind those outcomes — stellate ganglion blockade temporarily interrupting the sympathetic nerve conduction maintaining PTSD’s biological underpinnings — is now supported by Level 1B evidence from the 2020 JAMA Psychiatry RCT, a growing series of international studies, and the clinical experience of practitioners across the country who are producing results that meet or exceed standard care.
What is Stellate Ganglion Block?
The stellate ganglion — the cluster of sympathetic nerves formed by the inferior cervical and first thoracic ganglia at the base of the neck — is the anatomical relay node connecting the brain’s central autonomic network to the sympathetic nerve supply of the head, neck, upper body, and cardiovascular system. In PTSD and anxiety, trauma drives elevated nerve growth factor, which causes sympathetic nerve fiber sprouting, which sustains chronically elevated norepinephrine, which maintains the amygdala in a state of persistent hyperarousal. The system becomes self-reinforcing: elevated NGF maintains the sympathetic overdrive that elevates NGF.
Research consistently shows powerful results:
What Our Patients Say
How Stellate Ganglion Block Works
For The Woodlands' analytically oriented, evidence-driven community, the mechanism deserves full treatment rather than a summary.
Resetting the Sympathetic Nervous System
The 2024 BMJ Open clinician perception study's finding — that experienced behavioral health practitioners rate SGB at the level of their highest-rated standard interventions — implicitly reflects a clinical observation: SGB reaches something those standard interventions don't. That something is the sympathetic nervous system's self-reinforcing overactivation loop. Trauma elevates nerve growth factor. Elevated NGF drives sympathetic nerve sprouting — literally increasing the number of sympathetic fibers sending threat signals to the amygdala and cardiovascular system. Increased fiber density sustains elevated norepinephrine. Elevated norepinephrine maintains amygdala hyperresponsiveness. A hyperresponsive amygdala keeps the threat-detection system signaling danger. And each threat signal reinforces the NGF elevation that started the cycle.
SSRIs and SNRIs adjust the norepinephrine and serotonin consequences of this cycle without interrupting the cycle itself. Exposure therapies build cognitive and behavioral scaffolding around the hyperresponsive system without resetting the system. SGB interrupts the cycle at the stellate ganglion — the anatomical node sustaining the sympathetic outflow that drives every downstream consequence. By temporarily blocking nerve conduction here, it allows NGF to normalize, norepinephrine to drop, and the amygdala to recalibrate. That recalibration — not symptom management, but system reset — is the clinical experience behavioral health practitioners described when rating SGB alongside their highest-rated standard interventions.
Reducing Brain Inflammation and Hyperactivity
Beyond the immediate sympathetic reset, SGB produces measurable changes in the amygdala's threat-processing function. VA neuroimaging researchers at Long Beach documented the first functional imaging evidence of amygdala activity changes following SGB in 2015 — correlating those imaging changes with patients' reported symptom improvement and establishing a neurobiological basis for the observations clinicians had been making clinically for years. The right stellate ganglion, specifically, has a sympathetic communication advantage with the right insula and amygdala — which is why right-sided SGB is the primary approach and why the imaging changes are most pronounced in those structures.
For Woodlands patients managing professional demands that require sustained concentration, rapid executive function, and emotional regulation under pressure, this amygdala recalibration has direct functional relevance: the cognitive resources previously consumed by chronic hyperarousal become available for the work and relationships that define high-functioning daily life.
Conditions We Treat with Stellate Ganglion Block in The Woodlands
SGB addresses sympathetic nervous system dysregulation across a range of conditions. At Catalyst Health & Wellness, we offer SGB for:
PTSD
Rapid relief from hyperarousal, hypervigilance, and trauma symptoms
Read MoreAnxiety Disorders
Reducing the physical manifestations of severe anxiety
Read MorePanic Disorder
Calming the fight-or-flight response that drives panic attacks
Read MoreCombat-Related Trauma
Extensively studied in military populations with strong results
Read MoreComplex Trauma
Addressing symptoms from prolonged or repeated traumatic experiences
Read MoreTrauma with Physical Symptoms
Especially effective when anxiety manifests physically
Read MoreSGB integrates powerfully with Catalyst's other treatments. Many Woodlands patients find that SGB's system reset makes ketamine therapy, Spravato, or trauma-focused psychotherapy significantly more effective than prior attempts.
Your Stellate Ganglion Block Journey at Catalyst Health & Wellness
No cost, no commitment. A clinical team member discusses your full history — including prior treatment attempts, medication history, and what you're hoping the procedure will change. You receive an honest clinical assessment of whether SGB is appropriate for your situation, including if it isn't.
Step 1: Free Phone Consultation
No cost, no commitment. A clinical team member discusses your symptoms, treatment history, and what you’re looking for. You receive an honest clinical assessment of whether SGB is appropriate for your situation — including if it isn’t.
Step 2: Medical Evaluation
Dr. Ho conducts a thorough pre-procedure evaluation: medical history, current medications, prior procedures, and contraindication review. Every question is addressed before any commitment is made.
Step 3: Day of Procedure
Budget two to three hours at the clinic. Arrange transportation — post-procedure driving isn’t advisable. Comfortable clothing with accessible collar area. Normal eating unless instructed otherwise.
Step 4: The SGB Procedure
Dr. Ho uses real-time ultrasound imaging to visualize the stellate ganglion and surrounding anatomy before needle placement. Skin is numbed first. The anesthetic is delivered under continuous imaging guidance. The injection takes approximately 15–20 minutes. Warmth, slight hoarseness, or a sense of physical release during the procedure confirm the block is working.
Step 5: Recovery & Observation
One to two hours of monitored recovery follows. Temporary Horner syndrome effects — drooping eyelid, hoarseness, warmth on the treated side — resolve within a few hours and confirm the stellate ganglion was successfully reached. Our team remains present throughout.
Step 6: Assessing Response & Follow-Up
Changes typically emerge within hours to days. Our team follows up to track response and determine next steps: a second procedure two weeks later, maintenance scheduling, or complementary treatment options at Catalyst.
The Science Behind Stellate Ganglion Block
A systematic review published in Chronic Stress examined 17 published studies on SGB for psychiatric disorders, finding preliminary evidence supporting feasibility for treating sympathetic nervous system dysregulation conditions. Improvements were observed within 5 minutes and lasted one month or longer.
The 2020 randomized controlled trial in JAMA Psychiatry enrolled 113 active-duty service members across three military hospitals. Two SGBs two weeks apart produced a mean PTSD symptom reduction of −12.6 points versus −6.1 for sham — establishing Level 1B clinical evidence for SGB, the highest standard yet achieved for this procedure.
The 2024 BMJ Open study by Kirkpatrick and colleagues surveyed behavioral health clinicians — those with direct, first-hand SGB experience in their clinical practice — about their perceptions of SGB’s utility compared to standard PTSD treatments. Among clinicians who had actually used SGB with patients and compared those outcomes to standard care, the consensus was that SGB performs “at least as useful as the highest rated standard interventions for the treatment of PTSD.” This clinician-perception evidence bridges the gap between RCT data and real-world clinical utility — representing the accumulated judgment of practitioners who’ve seen both approaches work, and found SGB meets the standard of their best alternatives.
Key research findings:
- Behavioral health clinicians with first-hand SGB experience rated it at least as useful as their highest-rated standard PTSD treatments — a clinician consensus that reflects real-world outcomes, not just trial data
- The 2020 JAMA Psychiatry RCT established Level 1B evidence — the highest clinical standard yet achieved for SGB
- Standard PTSD treatments achieve remission in 30–40% of patients; SGB produces clinically significant positive outcomes in 70–83% — the largest gap in comparative effectiveness in the PTSD treatment landscape
- Effects appear within minutes to hours and typically last one month or longer; the 2025 bilateral SGB retrospective study confirmed 96% of patients maintained significant improvement at six-month follow-up
Why Choose Catalyst Health & Wellness for Stellate Ganglion Block in The Woodlands
01
Led by Dr. Ho – Anesthesiology Expertise
The 2024 BMJ Open study specifically notes that clinicians who viewed SGB most favorably were those with training in "the biological/medical model of PTSD" — a framing that aligns precisely with anesthesiology training. Dr. Ho's board certification in anesthesiology places him in the small group of physicians whose core training is built around nerve block anatomy, ultrasound guidance, and the clinical management of local anesthetic procedures in proximity to major vascular structures. For Woodlands patients who hold every provider to the highest standard, that credential is the appropriate benchmark.
02
Ultrasound-Guided Precision
The 2024 BMJ Open study’s clinician respondents specifically emphasized precision of technique as a variable in SGB outcomes. Every SGB at Catalyst uses real-time ultrasound imaging — direct visualization of the stellate ganglion and surrounding anatomy before needle placement. This is the standard of care reflected in the most rigorous published studies and the only approach Dr. Ho uses.
03
Whole-Person Approach
The Woodlands patients often arrive with sophisticated clinical questions about mechanism, response probability, maintenance protocols, and how SGB fits within their broader care picture. Our team engages at that level rather than simplifying past it. Treatment plans are built around your complete history and coordinated with existing psychiatric, psychological, and primary care providers. What this means:
- Individualized clinical assessment based on your specific trauma history and prior treatment response
- Active coordination with your existing care team
- Discussion of how SGB integrates with ongoing therapy for optimal combined outcomes
- Long-term engagement extending beyond the initial induction series
04
Extended Hours & Flexible Scheduling
The Woodlands attracts a workforce that includes energy executives, physicians, attorneys, and financial professionals — all managing demanding schedules that don’t accommodate standard weekday clinical windows. Our 5am to 9pm hours, Monday through Sunday at all three Houston locations, solve that. Pre-dawn appointments, evening sessions, weekend procedures — all available consistently. The 27-mile drive from The Woodlands to our Heights clinic via I-45 is the only obstacle, and our extended hours remove even that.
05
Comprehensive Treatment Options
SGB works best as part of a comprehensive approach to trauma recovery. We offer additional treatments that can complement your care:
IV Ketamine Therapy
Rapid relief for PTSD, depression, and anxiety
IM Ketamine Therapy
Intramuscular ketamine for those who prefer this method
Spravato Treatment
FDA-approved nasal esketamine for treatment-resistant depression
TMS Therapy
Non-invasive brain stimulation for depression and OCD
Many patients find that combining SGB with ketamine therapy produces the most comprehensive relief from trauma symptoms.
06
Safe, Comfortable Environment
We understand that people with trauma need to feel safe. Every detail of our treatment environment has been designed with your comfort in mind. Our staff is trained in trauma-informed care, and we move at your pace throughout the entire process. You’ll never be rushed or pressured.
Getting Started with Stellate Ganglion Block in The Woodlands
The Woodlands was built on the principle that quality is worth planning for — that the best version of something takes forethought, resources, and a commitment to getting it right. If PTSD or anxiety has been the one domain where your careful approach hasn’t produced the quality outcome you expected, SGB offers a biologically grounded intervention that behavioral health clinicians with first-hand experience are now rating at the level of their best tools. The evidence is solid. The physician is the right specialist. The clinic is accessible from The Woodlands via I-45.
Call (713) 772-5315 for your free consultation. We’ll engage with your history at the depth you expect, answer every question specifically, and give you an honest clinical picture of whether SGB makes sense for your situation. No charge, no pressure, complete confidentiality.
Monday-Sunday, 5am-9pm
Free consultation
Rapid relief
Three Houston locations
Expert anesthesiology care
Commonly Asked Questions
Get Help NowHow quickly does stellate ganglion block work?
Many patients notice improvement within days of the procedure, and some experience relief within minutes. Research shows that effects can appear within 5 minutes and last a month or longer. This rapid onset is one of SGB’s most remarkable features, especially for people who’ve been suffering with trauma symptoms for years.
Is stellate ganglion block safe?
Yes, SGB has been performed safely since the 1920s for various conditions. The procedure has a well-established safety profile with decades of clinical use. Common temporary effects include drooping eyelid, hoarse voice, and warmth on the treated side—all of which resolve within hours. Dr. Ho’s expertise as an anesthesiologist and use of ultrasound guidance ensures the highest safety standards.
Does the procedure hurt?
Most patients experience minimal discomfort. You’ll feel a small pinch from the initial numbing injection, followed by pressure as the medication is administered. The procedure itself takes only minutes, and most patients tolerate it very well. Dr. Ho’s gentle technique and experience help ensure your comfort.
How many SGB treatments will I need?
Many patients experience significant improvement after one or two treatments. Research protocols typically involve two SGBs administered two weeks apart. Some patients benefit from additional treatments over time. We’ll assess your response and recommend a treatment schedule based on your individual results.
How long do the effects last?
Effects typically last one month or longer, with some patients experiencing sustained improvement for many months. A 2025 study found that 96% of patients maintained significant improvement at 6-month follow-up. If symptoms return, the procedure can be repeated.
Can I combine SGB with other treatments?
Yes, many patients find that SGB works best as part of a comprehensive treatment approach. Combining SGB with ketamine therapy, for example, can provide both rapid sympathetic nervous system reset and enhanced neuroplasticity for processing trauma. SGB may also make traditional trauma therapy more tolerable and effective.
Do I need to talk about my trauma during treatment?
No. Unlike trauma-focused therapies that require detailed discussion of traumatic events, SGB works on the biological mechanisms underlying PTSD symptoms. You can share as much or as little as you’re comfortable with. The procedure addresses the physical hyperarousal component of trauma without requiring you to revisit painful memories.
Will insurance cover stellate ganglion block for PTSD?
Coverage varies by insurance plan. SGB for PTSD may be covered by some insurers, particularly when documented as treatment for a recognized condition with failed conventional treatments. We can help verify your benefits and discuss payment options during your consultation.
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