POTS: When Your Nervous System Forgets How to Stand Up

POTS has had a major moment over the past few years, partly because long COVID brought a wave of new cases and partly because patients are finally getting better at pushing for real answers. But this condition has been misdiagnosed, minimized, and undertreated for a long time. Most of the people I see with it have been told it's anxiety, deconditioning, or that they just need to drink more water. Sometimes all three.

POTS stands for Postural Orthostatic Tachycardia Syndrome. It's a form of dysautonomia (dysfunction of the autonomic nervous system). The defining feature is a heart rate increase of 30 or more beats per minute within ten minutes of standing, without a significant drop in blood pressure. That doesn't sound alarming on paper, but the lived experience can be: dizziness, heart pounding out of your chest, brain fog so thick you can't string a sentence together, exhaustion after minimal exertion, and a body that seems to fall apart every time you get vertical.

The conventional workup often stops at a tilt table test and a prescription. That's not enough. These patients need a layered approach.

This Is a Signaling Problem

POTS isn't a heart condition. The heart is just the one making noise. The real issue is upstream: the autonomic nervous system isn't regulating the transition from lying or sitting to standing properly. In most POTS patients, the sympathetic branch (fight-or-flight) is chronically overactivated. Norepinephrine can be elevated, blood volume is often low, and the body is trying to compensate for poor venous return from the lower extremities by driving the heart rate up.

Vagal tone matters here more than most people realize. The vagus nerve is the main highway of the parasympathetic nervous system, and low vagal tone is common in POTS. When vagal tone is poor, the brake on sympathetic activity is weak, so the heart rate spikes higher and takes longer to recover. Interventions that directly train vagal tone (slow diaphragmatic breathing, cold water on the face, humming, gargling, certain breathwork practices) change measurable outcomes. Heart rate variability is an objective marker of autonomic regulation, and it responds to these practices. I have patients track HRV with an Oura ring. The nightly readout shows how well the nervous system recovered, and it makes the feedback between daily habits and autonomic response visible in a way that's hard to argue with.

This is why managing POTS isn't just about which medication to reach for. If the nervous system stays stuck in overdrive, medications provide partial relief at best.

The Adrenal Connection

The adrenal glands sit right at the center of the POTS-nervous system relationship. Two of their key outputs, cortisol and aldosterone, are directly relevant. Aldosterone regulates sodium and water retention, which determines blood volume. Low aldosterone means low blood volume, which makes the standing-up problem dramatically worse. Cortisol shapes how the body responds to stress and how well the nervous system recovers between demands.

The DUTCH test is how I actually assess this. Looking at the full diurnal cortisol curve, cortisol metabolites, and the cortisol awakening response tells me whether someone is running hot and burning out or already depleted. In POTS patients I often see both patterns across the day: spikes in the morning with a crash by afternoon, or a flat, suppressed output across the board. These require different interventions.

For a depleted pattern, adrenal glandulars and adaptogens like ashwagandha or licorice root can help. Glycyrrhizin, the active compound in whole licorice root, mildly inhibits the enzyme that breaks down cortisol and has a mild aldosterone-like effect, which is directly relevant to blood volume in POTS. For the overdriven sympathetic pattern, phosphatidylserine helps normalize the cortisol curve, and certain B vitamins support the methylation pathways that keep catecholamine metabolism moving efficiently.

I don't default to an "adrenal cocktail" for everyone. Those have their place, but the approach has to follow the data. Without knowing the actual pattern, you're guessing.

Diet as a Foundation

Before supplements and medications, diet. Food sensitivities drive gut inflammation, increase intestinal permeability, and feed the neuroinflammation that keeps the nervous system dysregulated. In POTS patients, this isn't a peripheral issue. It's central.

An elimination diet removing the sensitive 7 foods is where I start. Those seven are gluten, dairy, eggs, soy, corn, peanuts, and tree nuts. The protocol is straightforward: remove all seven for four weeks, then reintroduce them one at a time, every three to four days, watching for symptom changes. Heart rate variability, fatigue, brain fog, and GI symptoms are all worth tracking. Some people react to one food, some to several, some find a clean diet resolves symptoms they assumed were fixed and structural.

Gluten and dairy are the ones I see cause the most trouble in this population. Both can worsen gut permeability, and leaky gut directly amplifies systemic inflammation and immune dysregulation. POTS and mast cell activation syndrome (MCAS) overlap significantly, and food triggers for mast cells vary by patient. High-histamine foods like fermented foods, aged cheeses, cured meats, and alcohol can provoke symptoms in some POTS patients even when the food isn't a traditional sensitivity.

Blood sugar stability matters more than most patients expect. Glucose spikes drive sympathetic activation. Protein and fat at every meal, no refined carbohydrates on their own. It sounds basic, but consistent blood sugar takes real load off a nervous system that's already stretched.

And sodium. POTS patients generally need more of it. Adequate dietary sodium paired with enough fluid helps expand plasma volume, which is often critically low. Most patients aren't doing this aggressively enough.

Amino Acids

Amino acids are significantly underused in POTS management. They're the raw material for the neurotransmitters and hormones running this whole system, and the right ones make a real difference.

L-tyrosine is the precursor to norepinephrine, epinephrine, and dopamine. This is where it gets patient-specific: in hyperadrenergic POTS (where norepinephrine is already elevated and causing the racing heart), you don't want to drive that pathway harder. But in post-viral or low-output POTS with depleted catecholamines, L-tyrosine can help restore what's missing. Knowing which type you're dealing with changes the recommendation entirely.

Taurine is one I use regularly across POTS cases. It has an inhibitory, calming effect on the nervous system, modulates calcium handling in cardiac tissue, and may reduce the exaggerated heart rate response to standing. It also has a meaningful effect on anxiety, which matters because anxiety and POTS have a real bidirectional relationship: each makes the other worse.

Magnesium glycinate is a baseline for nearly every POTS patient I work with. It supports muscle relaxation, sleep quality, and heart rate regulation. The glycinate form crosses into the nervous system more readily than other forms and has a gentle calming effect that compounds over time.

L-theanine and glycine both shift the nervous system toward parasympathetic. Glycine also improves sleep architecture and may reduce the overnight sympathetic activity that leaves so many POTS patients waking up exhausted. Glutamine supports gut lining integrity, which matters because gut dysbiosis and intestinal permeability are common in POTS and contribute to the neuroinflammation that keeps the nervous system dysregulated.

Medications

Beta blockers are the most commonly prescribed medication for POTS, and for good reason. They block the effect of adrenaline at beta-1 receptors in the heart, which directly limits how high the heart rate can spike with position changes.

Propranolol is often used in low doses (10 to 20mg). It's non-selective, addressing both cardiac and peripheral beta receptors, and it crosses the blood-brain barrier, which can help with the anxiety and cognitive piece. Atenolol and metoprolol are selective for cardiac beta-1 receptors and better tolerated by patients who are sensitive to propranolol's CNS effects.

Carvedilol is non-selective with alpha-1 blocking added, which causes vasodilation. For some POTS patients this helps. For others with already-low blood pressure, it makes things worse. It requires careful titration.

Fludrocortisone is a synthetic mineralocorticoid that acts like aldosterone, expanding plasma volume by promoting sodium and water retention. It's useful, particularly in patients with the low-blood-volume presentation, but it requires monitoring. Side effects at the wrong dose include headache, swelling, elevated blood pressure, and potassium depletion. Patients on fludrocortisone need potassium supplementation and regular labs.

Midodrine is an alpha-1 agonist that causes vasoconstriction in the peripheral veins, which reduces blood pooling in the legs when standing. It works well in combination with beta blockers and is most useful when orthostatic hypotension is part of the picture alongside the tachycardia.

Low dose naltrexone (LDN) is one I reach for regularly in POTS, particularly in post-viral cases and anywhere neuroinflammation or immune dysregulation is part of the picture. At doses of 1.5 to 4.5mg taken at bedtime, LDN transiently blocks opioid receptors overnight, which triggers a rebound upregulation of the body's own endorphins and has a downstream modulatory effect on microglial activation and systemic inflammation. For patients stuck in a chronic sympathetic overdrive pattern that isn't shifting, LDN can function as a reset. The effect is more of a recalibration than suppression. Tolerance is generally good, and side effects are minimal compared to most of what else is in this section.

What Actually Moves the Needle

The patients who do best are working on all of it at once. Blood volume through fluids, sodium, and compression. Nervous system regulation through vagal toning, sleep, and targeted supplements. Adrenal support guided by what DUTCH actually shows. Medications chosen for how their POTS actually presents.

POTS is not one condition. Hyperadrenergic, hypovolemic, post-viral, autoimmune — they look similar on the surface and respond very differently to treatment. What helps one patient makes another feel worse. The workup has to be thorough, and the plan has to follow the individual.

If you've been told your symptoms are anxiety, that your tilt table was "borderline," or that you just need to drink more water and exercise, and you're still not well, you deserve a more thorough look.