What is hyperadrenergic POTS?
Hyperadrenergic POTS (hy-per-ad-ruh-NUR-jik), or hyperPOTS, is a form of POTS where standing up sets off a surge of norepinephrine, the chemical your sympathetic nerves use to rev the body up. Heart rate climbs by 30 or more beats per minute within 10 minutes, and blood pressure often rises with it. The usual lab marker is a standing norepinephrine level above 600 pg/mL (Raj, 2013).
If you have hyperPOTS, you probably know what it's like to feel wired and exhausted at the same time. You stand up and your heart pounds, your hands shake and you start sweating in a room that isn't warm. Surges can come at rest or wake you at night. Because it looks so much like panic, many people hear that it's anxiety long before anyone checks their norepinephrine.
The usual first step is a beta blocker, and it often takes the edge off the heart rate. The sweating, the blood pressure swings and the fog tend to stay, and the bigger question goes unanswered: what's driving the system this hard?
The name hyperadrenergic POTS is fairly new. The pattern behind it has been described for decades as autonomic hyperactivity, most clearly in people recovering from brain injury, where it's called paroxysmal sympathetic hyperactivity. One review of that research counted 31 different names for the same condition (Perkes, 2010). That older lens is the more useful one, because it points to the parts of the nervous system that are supposed to hold the surge back.
Hyperadrenergic POTS Symptoms
Symptoms of orthostatic intolerance tend to sort into 2 groups. One group comes from the brain getting less blood while you're upright. The other comes from the sympathetic nervous system revving up, either to fix that problem or with nothing to fix. HyperPOTS leans hard into the second group, and most people have some of both.
Tap the symptoms you get
Less blood reaching the brain
Sympathetic surge
Pick the ones you get and the bar shows which side you lean toward.
On exam, the same overdrive shows up as a fast heart rate, higher blood pressure, wide pupils, heavy sweating, color changes in the skin, overheating and tight or spasming muscles.
The anxiety deserves its own mention. When the surge comes from a nervous system running without enough restraint, the racing heart and the dread arrive first and the worried thoughts follow. Therapy can help with coping, but it can't reach a brake that isn't engaging, so if you've done the work and the anxiety hasn't moved, the mechanism may never have been in your thoughts to begin with.
Hyperadrenergic POTS vs Regular POTS
| Typical POTS | Hyperadrenergic POTS | |
|---|---|---|
| Heart rate on standing | Rises 30+ bpm within 10 minutes | The same rise, often with pounding and tremor |
| Blood pressure on standing | Holds fairly steady | Often rises, sometimes sharply |
| Standing norepinephrine | Often raised as the body compensates | Above 600 pg/mL, and above 1,000 in the most central cases |
| Valsalva, late phase 2 | Diastolic rise under 15 mmHg | Diastolic rise of 15 to 17 mmHg or more |
| How it feels | Lightheaded, foggy, heavy | Wired, shaky, sweaty, pounding |
Sources: Raj, 2013; Okamoto, 2024; Kulapatana, 2026.
The overlap is real. Raj's review notes that high norepinephrine in POTS usually follows something else, such as low blood volume or partly damaged nerves, and that only a smaller group has a primary surge in central drive (Raj, 2013). Which of those you have changes what helps.
What Causes Hyperadrenergic POTS? 3 Ways the System Gets Stuck On
The useful question is why the sympathetic system is running so hard. There are 3 main answers, and from the outside they can look identical.
1. It's compensating
Something real needs fixing, such as blood pooling in the legs or less blood reaching the brain, and the surge is the correct response. Turning it down without fixing the cause removes the rescue.
2. A feedback loop isn't closing
Think about eating. You're hungry, you eat, you feel full and you stop, so the action changes the sensation and the sensation ends the action. Blood pressure runs on the same kind of loop: pressure sensors report back, and the brainstem eases off once pressure is where it should be. When that report doesn't arrive, the brainstem keeps pushing. In one study, a drop in blood pressure triggered a bigger burst of sympathetic nerve traffic in POTS patients than in healthy people, alongside signs of fewer working sympathetic nerves at the far end (Bonyhay, 2004).
3. The brakes have failed
Your nervous system is built in layers. The brainstem at the bottom is always ready to drive, and the newer, more advanced layers above it, including the cortex, cerebellum and hypothalamus, hold it in check with steady inhibition. To speed up, the brain simply eases off that brake. If the inhibition from above is lost, the brainstem runs with nothing holding it back, which the video above calls all gas and no brakes.
All 3 can produce the same racing heart, the same sweat and the same high lab number, and each one needs a different response.
Where the Brakes Can Fail, From Brain to Nerves
Sympathetic control runs in a chain of levels from the cerebral cortex down through the hypothalamus, brainstem and spinal cord to the nerves in your body. Neurologists call this column the neuraxis, and a problem anywhere along it can produce hyperPOTS (Benarroch, 1993).
Tap a level to see what happens when its brake fails.
All working
Gold signals from the higher centers hold the brainstem in check, feedback from pressure sensors closes the loop, and the sympathetic drive stays matched to what you're doing.
The same levels can be injured in many ways: low oxygen, reduced blood flow from a stroke, a car accident, sports injury or fall, shearing of the brain's wiring in a concussion, bleeding or fluid that raises pressure inside the skull, spinal cord injury, damaged peripheral nerves, infections that inflame the brain, and shifts in GABA and glutamate, the chemicals the brain uses to apply the brakes. In the brain injury research, 79% of reported cases of sympathetic hyperactivity followed traumatic brain injury, 10% followed oxygen loss and 5% followed stroke (Perkes, 2010).
This is why 2 people with the same diagnosis can respond so differently to the same treatment. One person's hyperPOTS starts in the frontal lobe after a concussion, and another's starts with small fiber neuropathy. When a treatment that helped someone else does nothing for you, it usually says more about where it was aimed than about you.
What Your Norepinephrine Level Actually Tells You
Norepinephrine is the chemical sympathetic nerves release to pass their signal along (Goldstein, 2010). A high standing level confirms the system is working hard, and it can't tell you which of the 3 reasons is behind it.
1 lab result, 3 possible causes
Nerve recordings don't settle it either. In a 2026 Vanderbilt study, people with hyperadrenergic POTS had sympathetic nerve traffic similar to other POTS patients, yet their blood vessels reacted far more strongly to each burst (Kulapatana, 2026). The same number can come from very different machinery.
How Hyperadrenergic POTS Is Diagnosed
Standard testing is built to confirm the label. A tilt table test or a 10 minute stand test records heart rate and blood pressure, and blood drawn after at least 10 minutes lying down and 10 minutes upright compares norepinephrine levels (Raj, 2013). Plasma metanephrines rule out pheochromocytoma, an adrenal tumor that can look similar.
Some autonomic labs add the Valsalva maneuver, where you bear down against a closed airway. A diastolic pressure rise of more than 17 mmHg late in phase 2 identified the patients with the highest sympathetic nerve activity in one study, with 71% sensitivity and 85% specificity, and a 2026 follow-up proposed 15 mmHg as the cutoff (Okamoto, 2024; Kulapatana, 2026).
Those tests rarely ask which level is failing. Answering that takes different measurements: whether the baroreflex works, whether blood flow to the brain holds up when you stand, how CO2 shifts with your breathing, how the frontal lobe and cerebellum perform on a bedside neurological exam with eye movement testing, balance and coordination, and whether the small nerves are intact.
Step inside a tilt test
Watch a tilt test in 3D and see the brain blood flow and CO2 our testing adds.
Take the 3D TourHyperadrenergic POTS Treatment: What Medications Do
Medication can make daily life more manageable, and it helps to know what each type actually does.
Beta blockers
Beta blockers block adrenaline's effect on the heart. In a Vanderbilt trial, a low 20 mg dose of propranolol lowered standing heart rate and improved symptoms. An 80 mg dose lowered heart rate further, yet symptoms improved less, and the authors noted that higher doses may make symptoms worse (Raj, 2009).
With the brakes failing, the sympathetic chain drives every target at once: pupils, sweat glands, heart, arteries and gut.
That result makes sense once you see where a beta blocker acts. It quiets the heart and leaves the drive untouched, so the signal still reaches the sweat glands, blood vessels, pupils and gut. And if the fast heart rate was helping hold blood flow to the brain, slowing it can deepen the fog.
Central sympatholytics
Clonidine and methyldopa act centrally to turn down sympathetic outflow, and Raj lists them as options for the central hyperadrenergic group (Raj, 2013). Guanfacine, another central sympatholytic, was tested in an uncontrolled Vanderbilt cohort, where 85% of patients flagged as hyperadrenergic by the Valsalva marker reported improvement on guanfacine, compared with 44% of the others (Okamoto, 2024).
That pattern fits the brakes model: in this group, quieting the central drive tends to help more than blocking one organ. Neither approach rebuilds the brake itself. Medication decisions belong with your prescriber, and they work best alongside a plan aimed at the level that's failing.
Treating the Level That's Failing
The goal is to restore restraint where it was lost, and the work depends on the level.
A hypothalamic problem calls for different exercises than a brainstem problem, so the evaluation comes before the plan.
Still working out which pattern fits you? The free POTS Roadmap walks through the 6 steps our team uses to find the cause and where to start.
Get the free RoadmapWhy HyperPOTS and MCAS Often Show Up Together
Many people with hyperPOTS also carry a mast cell activation diagnosis, with flushing, hives, gut trouble and food reactions. Mast cell disorders can produce a hyperadrenergic response to standing, with a racing heart and rising blood pressure together (Raj, 2013). The insula and cingulate cortex sit in the brain's central autonomic network (Benarroch, 1993), and in our clinical model the same circuits shape immune responses, so when restraint is lost high in the system, cardiovascular and immune overactivity can travel together. For some people that means 2 diagnoses with a single shared mechanism underneath.
Key Takeaways
- HyperPOTS is measurable: a heart rate rise of 30+ bpm on standing, often a blood pressure rise, and standing norepinephrine above 600 pg/mL.
- A high norepinephrine level has at least 3 possible causes: compensation, a feedback loop that isn't closing, or lost brakes from higher centers.
- The brakes can fail at any level from the cortex to the peripheral nerves, and each level needs different work.
- Beta blockers quiet the heart without touching the drive, and in the Vanderbilt trial a low dose helped symptoms more than a high one.
Hyperadrenergic POTS FAQ
What is hyperadrenergic POTS?
Hyperadrenergic POTS is a form of POTS where standing triggers a surge of norepinephrine. Heart rate rises by 30 or more beats per minute within 10 minutes, blood pressure often rises too, and standing norepinephrine is usually above 600 pg/mL. People often describe feeling wired, shaky and sweaty, with surges that can come at rest or at night.
Is it hyperadrenergic or hyperandrogenic POTS?
The correct term is hyperadrenergic, from adrenergic, which refers to adrenaline and norepinephrine, the chemicals behind the surge. Androgens are sex hormones such as testosterone, and they aren't part of the definition. The 2 words sound alike, so the mix-up is common.
How do you pronounce hyperadrenergic?
Hy-per-ad-ruh-NUR-jik. Most people shorten hyperadrenergic POTS to hyperPOTS.
What's the difference between hyperadrenergic POTS and regular POTS?
Both involve a heart rate rise of 30 or more beats per minute on standing. In hyperadrenergic POTS, blood pressure often rises on standing too, standing norepinephrine is above 600 pg/mL, and the symptoms lean toward palpitations, tremor, sweating and anxiety-like surges. Typical POTS leans more toward lightheadedness, fog and fatigue, though most people have some of both.
How is hyperadrenergic POTS diagnosed?
A tilt table or stand test records heart rate and blood pressure, and blood drawn lying down and after 10 minutes upright compares norepinephrine levels. Plasma metanephrines rule out pheochromocytoma, an adrenal tumor that can look similar. Some labs also use the Valsalva maneuver, where a diastolic rise of 15 to 17 mmHg or more in late phase 2 points to high sympathetic activity. None of these show which level of the nervous system is driving it, which takes a neurological and blood flow evaluation.
Is the anxiety in hyperPOTS psychological?
The anxiety is real, and in hyperPOTS it's often driven by the body. When sympathetic and limbic output run without enough restraint, the racing heart, dread and hypervigilance come first and the worried thoughts follow. That's why therapy alone often doesn't resolve it, even though it can help with coping.
Do beta blockers work for hyperadrenergic POTS?
They can lower heart rate and ease palpitations, and low doses tend to work better than high ones. In a Vanderbilt trial, 20 mg of propranolol improved symptoms more than 80 mg did. A beta blocker acts at the heart and leaves the central drive running, so sweating, blood pressure swings and fog often stay. Talk with your prescriber before changing any medication.
Does hyperadrenergic POTS go away?
The label doesn't predict the course. What changes the outlook is finding which level is failing and why, then training that level. A surge that started after a concussion, after a virus or with small fiber neuropathy each calls for a different plan.
Can the brakes fail on the parasympathetic side too?
It can, and the result is a slow heart rate, low blood pressure, small pupils, flushing and extra saliva or airway secretions. It's more common in orthostatic intolerance than in hyperPOTS. Some people, often athletes, drop right after they stop exercising as blood stays in their muscles and both heart rate and pressure fall. Strong swings between both sides are rare outside severe brain injury, where they're called autonomic storms.
Can hyperadrenergic POTS be treated without medication?
Many people work on it without medication or alongside it. Rehabilitation aimed at the failing level, such as frontal inhibition work, baroreflex training, vestibular and eye movement therapy and better sensory input, targets the brakes directly. Medication changes belong with your prescriber.
Keep Reading
Sources
- Raj SR. Postural tachycardia syndrome (POTS). Circulation. 2013;127:2336-2342. doi:10.1161/CIRCULATIONAHA.112.144501
- Raj SR, Black BK, Biaggioni I, et al. Propranolol decreases tachycardia and improves symptoms in the postural tachycardia syndrome: less is more. Circulation. 2009;120:725-734. doi:10.1161/CIRCULATIONAHA.108.846501
- Okamoto LE, Urechie V, Rigo S, et al. Hyperadrenergic postural tachycardia syndrome: clinical biomarkers and response to guanfacine. Hypertension. 2024;81:2237-2247. doi:10.1161/HYPERTENSIONAHA.124.23035
- Kulapatana S, Okamoto LE, Rigo S, et al. Hyperadrenergic postural tachycardia syndrome associated with augmented neurovascular transduction. Clinical Autonomic Research. 2026;36:271-283. doi:10.1007/s10286-025-01183-z
- Perkes I, Baguley IJ, Nott MT, Menon DK. A review of paroxysmal sympathetic hyperactivity after acquired brain injury. Annals of Neurology. 2010;68:126-135. doi:10.1002/ana.22066
- Benarroch EE. The central autonomic network: functional organization, dysfunction, and perspective. Mayo Clinic Proceedings. 1993;68:988-1001. doi:10.1016/s0025-6196(12)62272-1
- Benarroch EE. Paraventricular nucleus, stress response, and cardiovascular disease. Clinical Autonomic Research. 2005;15:254-263. doi:10.1007/s10286-005-0290-7
- Guyenet PG. The sympathetic control of blood pressure. Nature Reviews Neuroscience. 2006;7:335-346. doi:10.1038/nrn1902
- Bonyhay I, Freeman R. Sympathetic nerve activity in response to hypotensive stress in the postural tachycardia syndrome. Circulation. 2004;110:3193-3198. doi:10.1161/01.CIR.0000147280.90339.E9
- Goldstein DS. Catecholamines 101. Clinical Autonomic Research. 2010;20:331-352. doi:10.1007/s10286-010-0065-7
Dr. Keiser is a board-certified chiropractic neurologist (DC, DACNB, FABBIR), not a medical doctor (MD/DO). This content is for educational purposes and does not constitute medical advice. It is not a substitute for professional medical evaluation, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. Medication decisions should be made with your prescribing physician.
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