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 Cypress, TX: Rapid Relief for PTSD, Anxiety, and Trauma
Named the #1 hottest zip code for homebuyers in the United States in 2023, Cypress draws families for a reason — the Cy-Fair school district, the master-planned communities stretching across northwest Harris County, and the deeply family-oriented culture that makes this one of Houston’s most livable suburban corridors. People here invest in their family life deliberately. When PTSD or trauma-related anxiety is quietly dismantling that investment — through irritability that erupts without warning, emotional distance that keeps family members at arm’s length, or the inability to be genuinely present in the home you’ve built — stellate ganglion block offers a direct biological intervention that addresses those specific symptoms at their neurological source. Dr. Ho, board-certified anesthesiologist and former pediatrician, performs this ultrasound-guided procedure at Catalyst Health & Wellness, serving Cypress and patients from Copperfield, Jersey Village, Bridgeland, Fairfield, and northwest Harris County. Three Houston locations, open 5am–9pm, seven days a week.
Cypress TX - Protect Your Family First
There’s a specific way PTSD damages family life that rarely gets named directly. It’s not usually the flashbacks or the nightmares — those are private. It’s the irritability that turns dinner into a confrontation. The emotional numbing that makes your spouse feel like they’re living with a stranger. The inability to enjoy a birthday party or a soccer game because you’re scanning the environment instead of being present in it. The anger that arrives faster and louder than the situation warrants — and that the people closest to you absorb most.
These symptoms aren’t personal failures or relationship problems. They’re the arousal and reactivity cluster of PTSD — and according to a landmark 2016 study in Military Medicine by Mulvaney et al., “irritability or angry outbursts, difficulty concentrating, and sleep disturbance” are the symptoms that show the greatest improvement in the first week following stellate ganglion block. The 2024 secondary analysis of the JAMA Psychiatry RCT, published in Translational Psychiatry, confirmed this finding at scale across 113 service members — finding that the arousal and reactivity symptom cluster “demonstrated the greatest symptom severity reductions after SGB, relative to sham.” The symptoms that damage family relationships most are also the ones SGB most consistently and most rapidly addresses.
Catalyst Health & Wellness serves Cypress as a fully REMS-certified SGB provider. The procedure works at the biological mechanism maintaining those symptoms. Dr. Ho’s expertise ensures it’s done correctly. And the goal isn’t symptom reduction on a clinical scale — it’s being present in your own home.
What is Stellate Ganglion Block?
The stellate ganglion — a cluster of sympathetic nerves formed by the fusion of the inferior cervical and first thoracic ganglia at the base of the neck — is the primary relay node connecting the brain’s central autonomic network to the sympathetic nerve supply of the head, upper body, and cardiovascular system. In PTSD and chronic anxiety, trauma drives elevated nerve growth factor, which causes sympathetic nerve sprouting and chronically elevated norepinephrine, which maintains the amygdala in a state of persistent high alert.
Research consistently shows powerful results:
What Our Patients Say
How Stellate Ganglion Block Works
Understanding why SGB specifically reduces irritability, emotional reactivity, and the arousal symptoms that damage family relationships requires understanding what the sympathetic nervous system is doing to produce them.
Resetting the Sympathetic Nervous System
The arousal and reactivity symptoms of PTSD — irritability, hypervigilance, exaggerated startle, concentration difficulties, sleep disruption — are the direct outputs of a sympathetic nervous system running chronically overactivated. Elevated norepinephrine from the locus coeruleus floods the amygdala, maintaining it in a state of threat-readiness that hasn't been able to stand down since the traumatic experience. Every additional stressor — a child's loud noise, a traffic jam, an unexpected question — arrives into a system that is already at near-maximum sympathetic activation. The result is the disproportionate, fast-arriving reaction that patients describe as feeling "out of nowhere" but that their families receive as a pattern.
The 2024 Translational Psychiatry secondary analysis identifies why SGB specifically improves these symptoms: SGB's "presumed downregulating effects on sympathetic nervous system activity" directly reduce the elevated norepinephrine and amygdala hyperresponsiveness that produce the arousal cluster.
By temporarily blocking stellate ganglion nerve conduction — the sympathetic relay sustaining that elevated state — SGB allows norepinephrine to normalize, the amygdala to recalibrate, and the threshold for reactive arousal to rise back toward something closer to a pre-trauma baseline.
Reducing Brain Inflammation and Hyperactivity
Beyond the immediate sympathetic reset, SGB produces downstream changes in the amygdala's processing of emotionally relevant stimuli. The amygdala in PTSD is hyperresponsive: it fires more readily, more intensely, and to a broader range of cues than it would in a regulated state. This hyperresponsiveness is what makes neutral sounds seem threatening, ordinary frustrations feel intolerable, and what should be manageable parenting or relationship moments escalate into disproportionate reactions.
VA neuroimaging researchers documented changes in amygdala activity following SGB using fMRI, correlating those changes with symptom improvement. The Blakey 2024 secondary analysis further specified that "reductions in irritability or angry outbursts, concentration difficulties, and sleep disturbance" — the three highest-impact family symptoms — were confirmed as the most pronounced item-level improvements in the arousal and reactivity cluster following SGB. For Cypress families, this means the research is specifically describing the symptom set that has been hardest on the people who live with PTSD's effects.
Conditions We Treat with Stellate Ganglion Block in Cypress
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 Cypress patients find that SGB's arousal reduction 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 symptoms, treatment history, and what you're hoping to change. You receive an honest assessment of whether SGB is clinically appropriate — including a direct answer if it isn't.
Step 1: Free Phone Consultation
No cost, no commitment. A clinical team member discusses your symptoms, treatment history, and goals. You receive an honest assessment of whether SGB is clinically appropriate — including a direct answer 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 2024 secondary analysis published in Translational Psychiatry — by Blakey and colleagues from RTI International — went deeper than the original RCT, asking which specific PTSD symptom clusters respond most strongly to SGB versus sham. The finding: the arousal and reactivity cluster demonstrated the greatest symptom severity reductions following SGB. Post-hoc item-level analysis confirmed that the specific drivers were “reductions in hypervigilance, concentration difficulties, and sleep disturbance” — along with “reductions in physiological reactions to trauma cues, emotional reactions to trauma cues, and intrusions” in clinician-rated outcomes. This symptom-level specificity is directly relevant to Cypress families experiencing PTSD’s impact on daily home life.
Key research findings:
- The 2024 Translational Psychiatry secondary analysis confirms the arousal and reactivity cluster — including irritability, hypervigilance, concentration, and sleep — as the most SGB-responsive PTSD symptom cluster
- The 2016 Military Medicine Mulvaney study identified “irritability or angry outbursts, difficulty concentrating, and sleep disturbance” as showing the greatest improvement in the first week post-SGB — exactly the symptoms most impactful on family relationships
- The 2020 JAMA Psychiatry RCT established Level 1B evidence — the highest clinical standard achieved for SGB in PTSD
- Effects appear within minutes to hours and last one month or longer; the 2025 bilateral SGB retrospective study confirmed 96% improvement at six-month follow-up
Why Choose Catalyst Health & Wellness for Stellate Ganglion Block in League City
01
Led by Dr. Ho – Anesthesiology Expertise
SGB requires nerve block anatomy expertise, ultrasound guidance proficiency, and the clinical judgment to manage anesthetic delivery adjacent to major cervical vascular structures. Dr. Ho's board certification in anesthesiology covers these skills at their foundation — not as additions to another specialty. For League City's results-oriented professional community — where credentials are evaluated and expertise matters — that background is the appropriate standard. His former career as a pediatrician ensures precision is paired with genuine patient attentiveness.
02
Ultrasound-Guided Precision
The 2025 prevention trial specifically uses ultrasound-guided SGB — confirming that imaging guidance remains the standard for rigorous SGB research. Every SGB at Catalyst uses real-time ultrasound. The target anatomy is visualized before the needle is placed. This is not optional — it’s how the procedure should be done.
03
Whole-Person Approach
League City patients often arrive having already read the research, thought carefully about the mechanism, and developed specific clinical questions. Our team engages at that level rather than simplifying past it. Treatment plans reflect your complete history and are coordinated with existing care providers. What this means:
- Treatment shaped around your specific trauma type, symptom profile, and prior treatment history
- Active coordination with your existing therapist, psychiatrist, or VA provider
- Guidance on combining SGB with other Catalyst treatments for comprehensive outcomes
- Ongoing support extending well beyond the procedure itself
04
Extended Hours & Flexible Scheduling
Aerospace professionals, marine professionals, first responders, and NASA-connected workers manage 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 procedures, weekend sessions — all available.
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 League City
League City is a place for people who move with intention — who choose where they live and what they invest in carefully, and whose planning extends forward as well as backward. If PTSD, anxiety, or trauma has been the one domain where that intentional approach hasn’t yet paid off — where the available options have helped partially but never fully — SGB offers a mechanistically understood, evidence-supported intervention that’s available now. The prevention research is emerging. The treatment evidence is solid. The physician is the right specialist.
Call (713) 772-5315 for your free consultation. We’ll discuss your history, answer every question at the depth you deserve, and give you an honest clinical picture of whether SGB makes sense for your situation. No charge, no pressure, complete confidentiality.
Our South Loop and Heights locations are both accessible from League City via the Beltway 8 and I-45.
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.
Our Locations
Blog & insight
Insights on Healing, Growth, and Mental Wellness
June 13, 2026
FAQ: Common Questions About Ketamine Treatment Answered
If you've been researching ketamine therapy in Houston, chances are you've come across a lot of conflicting information. One article calls it a miracle cure. Another paints it as a risky party drug. Somewhere in between sits the truth, and you deserve straightforward answers before making any decision about your mental health or chronic pain…
June 10, 2026
Can Ketamine Therapy Help with Both Depression and Anxiety?
If you've spent years battling depression only to find anxiety creeping in alongside it (or vice versa), you're not imagining the connection. These two conditions show up together far more often than people realize, and the overlap can make recovery feel like trying to untangle a knot that keeps tightening. Traditional antidepressants and anti-anxiety medications…
June 7, 2026
Neuropathic Pain and Ketamine: Relief When Nerve Pain Won’t Quit
If you live with neuropathic pain, you already know it doesn't behave like ordinary pain. It burns when nothing touched you. It shocks down your leg while you're sitting still. It turns the brush of a bedsheet into something sharp. And the medications your doctor prescribed, the gabapentin, the duloxetine, maybe even opioids, take the…
Make an Appointment
Our mission is to empower individuals to overcome life’s challenges through professional psychological support.