How to Treat Hyponatremia at Home Safely

Mild hyponatremia, where blood sodium dips just below the normal range, can sometimes be managed at home with simple measures like restricting fluid intake and adjusting your diet. But the word “safely” is doing a lot of work in that sentence. Hyponatremia spans a wide severity spectrum, and the approaches that help a mildly low sodium level can be dangerous or simply inadequate when levels drop further. Understanding where the line falls between a home-manageable situation and a medical emergency is the most important part of treating this condition outside a hospital.

When Home Management Is Reasonable and When It Is Not

Blood sodium normally sits between about 135 and 145 millimoles per liter. Hyponatremia is defined as anything below 135, but the risks escalate sharply as the number drops. Mild cases (roughly 130 to 134) often produce vague symptoms like low energy, mild nausea, or a general sense of feeling off. Moderate cases (125 to 129) can bring on headaches, confusion, and muscle cramps. Severe cases (below 125) are a different animal entirely and can cause seizures, loss of consciousness, and death.

Symptoms range from weakness and nausea at the mild end to seizures, coma, and cardiorespiratory distress in severe cases, and severely symptomatic hyponatremia is a medical emergency.¹ Home treatment only makes sense if your hyponatremia is mild, you know the cause, and a doctor has confirmed that the situation does not require hospital-level correction. If you have any neurological symptoms beyond mild fatigue, like confusion, unsteadiness, vomiting, or a severe headache, go to an emergency room. No home remedy can substitute for intravenous treatment when sodium levels are critically low.

Fluid Restriction as the Starting Point

The single most common recommendation for mild hyponatremia is to drink less fluid. This sounds counterintuitive in a culture that preaches hydration, but when sodium is low, the problem is often too much water relative to the amount of sodium in your body. Your kidneys normally flush excess water, but certain conditions interfere with that process, and the extra water dilutes your blood sodium.

For exercise-associated hyponatremia with negligible symptoms, restricting fluids alone can be enough to let sodium normalize on its own.² The same principle applies to mild chronic cases. Typical guidance ranges from limiting total daily fluid intake to around 1 to 1.5 liters, though the exact target depends on the cause and severity. Your doctor should set that number for you, because restricting too aggressively can cause dehydration, and not restricting enough won’t move the needle.

Fluid restriction is easier said than done. It means tracking everything you drink, including coffee, soup, and water-heavy fruits. Many people find it surprisingly hard to maintain for more than a few days, which is one reason doctors often pair it with other strategies.

Increasing Sodium and Solute Through Diet

Eating saltier food or taking salt tablets is another approach that makes intuitive sense: if sodium is low, add more sodium. In a hospital setting, salt tablets have been used alongside fluid restriction to safely raise sodium in elderly patients with chronic hyponatremia.³ At home, this might translate to adding more salt to meals or snacking on salty foods like broth, pickles, or salted nuts.

There is an important caveat here. Oral sodium works best in situations where the body’s overall fluid balance is roughly normal (what doctors call euvolemic hyponatremia) or where you are mildly volume-depleted. If your hyponatremia is caused by a condition that makes your body hold onto too much fluid, like heart failure or liver cirrhosis, adding salt can make things worse by increasing fluid retention. In advanced cirrhosis with hyponatremia, patients often have a kind of relative low blood volume where salt restriction could harm kidney function, but that does not mean loading up on salt is safe either.⁴ These fluid-overloaded states require medical supervision, not home salt therapy.

Boosting Protein Intake

A less obvious home strategy involves eating more protein. When your body metabolizes protein, it produces urea, which acts as an osmotic solute that helps your kidneys excrete more free water. Low protein diets, sometimes called “tea and toast” diets common among older adults, can actually contribute to hyponatremia because the kidneys don’t have enough solute to drive adequate water excretion.

A proof-of-concept study found that seven days of daily protein supplementation raised blood sodium by a median of about 3 millimoles per liter in patients with hyponatremia from the syndrome of inappropriate antidiuresis, with a corresponding rise in blood urea levels.⁵ That is a modest bump, but for someone whose sodium is hovering just below normal, a few points can move them back into the safe range. Patients with low solute intake and low urine output are the ones most likely to benefit from increasing dietary solute, whether through protein or oral urea supplements.⁶

In practical terms, this means adding eggs, chicken, fish, cheese, or legumes to meals rather than subsisting on low-protein, carbohydrate-heavy foods. It is a gentle intervention that won’t raise sodium dangerously fast but can nudge things in the right direction over days to weeks.

Oral Urea as a Targeted Treatment

Oral urea is a treatment that sits somewhere between a dietary change and a prescription medication. It is essentially pure urea dissolved in a drink, and it works by increasing free water excretion through the kidneys. European guidelines support its use for managing hyponatremia caused by the syndrome of inappropriate antidiuresis, and it has been studied more extensively in recent years.⁷

A systematic review and meta-analysis found that urea treatment raised blood sodium substantially in patients with this syndrome, and the effect was comparable to both fluid restriction and vaptan medications (a class of drugs that block the hormone responsible for water retention).⁸ Urea’s safety profile is encouraging: no cases of osmotic demyelination syndrome (a dangerous brain injury from correcting sodium too fast) have been reported with urea use, and the rate of sodium rise tends to be gradual and predictable.⁷

The biggest obstacle is that urea tastes terrible. Poor palatability is the most commonly reported complaint.⁸ Research into better-tasting formulations is ongoing, and some clinics mix urea with orange juice or flavored syrups to mask the bitterness. In the United States, oral urea is available through compounding pharmacies, though it is not widely stocked on regular pharmacy shelves. You will need a doctor’s prescription or guidance to obtain and dose it properly, since effectiveness depends partly on the concentration of your urine.⁹

Medications That Can Cause Hyponatremia

Before reaching for salt tablets or protein shakes, it is worth asking whether something you are already taking is causing the problem. A number of common medications can lower blood sodium, and sometimes the most effective home intervention is working with your doctor to adjust or discontinue the offending drug.

Two medication classes stand out for their frequency. Thiazide diuretics (water pills prescribed for high blood pressure) are one of the most common culprits. Selective serotonin reuptake inhibitors, or SSRIs, which are widely prescribed for depression and anxiety, are the other. A study of older adults found that taking both at the same time increased the odds of developing hyponatremia by roughly a quarter compared to taking either one alone.¹⁰ Other medications linked to low sodium include certain antiepileptic drugs, some chemotherapy agents, and the recreational drug MDMA.

If your doctor identifies a medication as the likely cause, stopping or switching it can allow sodium to normalize without any other intervention. Never discontinue a prescription medication on your own just because you read it might cause hyponatremia. The drug may be treating something more dangerous than mildly low sodium. Instead, bring it up at your next appointment or call your prescriber.

Exercise-Associated Hyponatremia

Runners, cyclists, hikers, and anyone exercising for several hours in heat can develop hyponatremia if they drink too much water during activity. The underlying mechanism involves excessive fluid intake combined with ongoing secretion of the hormone that tells your kidneys to hold onto water, even when your body doesn’t need it. Sodium lost through sweat contributes somewhat, but overdrinking is the bigger driver.²

Mild exercise-associated hyponatremia with minimal symptoms can resolve with fluid restriction alone. In moderate cases, oral concentrated salt solutions can help raise sodium. For hyponatremic runners in critical situations, a concentrated oral salt solution can prompt a quick recovery.¹¹ However, giving fluids of any kind to someone with severely low sodium can be fatal because of the risk of brain swelling, which is why sodium levels should ideally be checked before treatment begins. Severe cases with confusion, vomiting, or altered consciousness require emergency intravenous treatment with concentrated saline.

Prevention is the better home strategy here. Drink to thirst during prolonged exercise rather than forcing down a set number of ounces per hour. The old advice to drink as much as possible has been walked back by sports medicine experts precisely because it contributed to exercise-associated hyponatremia.

Why Sports Drinks Are Not a Reliable Fix

Many people assume that switching from water to a sports drink during exercise will prevent hyponatremia because sports drinks contain sodium. Research does not support that assumption. Standard commercial sports drinks contain too little sodium relative to what you lose in sweat during prolonged exercise, and they do not prevent blood sodium from falling during long endurance events.¹² The sodium concentration in a typical sports drink is far below the concentration of your blood, so drinking large volumes of them still dilutes your blood sodium, just slightly less than plain water would.

Specialized oral rehydration solutions used in medical settings contain much higher sodium concentrations. These are not the same thing as what you buy at a gas station. If you are competing in an event lasting several hours and are concerned about hyponatremia, managing total fluid volume is more protective than switching to a sodium-containing drink.

Herbal Detoxes and Excessive Fluid Intake

The wellness industry’s enthusiasm for “detox” regimens and aggressive hydration creates a real hyponatremia risk that many consumers don’t anticipate. One documented case involved a 67-year-old man who developed severe hyponatremia with a sodium level of 111 (dangerously low) after following a five-day kidney detox program that required drinking over a gallon of fluid daily along with herbal teas.¹³ He arrived at the emergency department with neurological symptoms.

Some herbal preparations may also directly trigger inappropriate secretion of the water-retaining hormone. A scoping review of Chinese herbal medicine and hyponatremia found that roughly 90% of affected patients had blood work consistent with this syndrome.¹⁴ Whether the herbs themselves cause the hormone dysregulation or the associated high fluid intake is the main problem remains an open question, but the practical takeaway is the same: if you are managing hyponatremia at home, steer clear of any program that instructs you to drink large volumes of water, herbal teas, or juices. These regimens can undo your treatment efforts and push sodium levels into dangerous territory.

The Danger of Correcting Sodium Too Quickly

One of the reasons doctors are cautious about home treatment for hyponatremia is the risk of raising sodium too fast. When sodium has been low for more than about 48 hours (chronic hyponatremia), the brain adapts by shedding some of its own solutes to prevent swelling. If sodium then rises quickly, the brain can lose water faster than it can re-adapt, leading to a condition called osmotic demyelination syndrome. This damages the protective insulation around nerve fibers and can cause permanent neurological injury or death.

A systematic review and meta-analysis found that rapid correction of sodium was associated with more than triple the odds of developing osmotic demyelination syndrome. Specifically, correcting sodium by more than 8 millimoles per liter in 24 hours was linked to a roughly fourfold increase in risk.¹⁵ For patients whose sodium starts below 115, the risk is especially high, and some experts recommend limiting correction to under 8 millimoles per liter per day.¹⁶

At home, you cannot monitor your sodium level hour by hour the way a hospital can. This is the core reason that moderate and severe hyponatremia should not be treated at home. Even well-intentioned interventions like salt loading or aggressive fluid restriction can overshoot the safe rate of correction. If you are managing mild hyponatremia at home, periodic blood tests to check your sodium level are essential so your doctor can confirm that correction is happening at a safe pace.

Older Adults and the Subtle Toll of Mild Hyponatremia

Mild chronic hyponatremia is often dismissed as harmless because it rarely causes obvious symptoms. But in older adults, it carries real consequences that tend to fly under the radar. A study comparing hospitalized patients with mild hyponatremia to controls with normal sodium found that patients with low sodium were far more likely to have been admitted for falls. Their gait was measurably unsteadier, and their reaction times on attention tests were slower.¹⁷

For an older person living alone, unsteadiness and impaired attention can mean a hip fracture or a head injury from a fall. This makes it worth treating even “mild” hyponatremia in the elderly rather than waiting for it to get worse. Simple measures like reviewing medications with a doctor (thiazides and SSRIs are common in this age group), increasing dietary protein, and limiting unnecessary fluid intake can all contribute to bringing sodium back up. Families and caregivers should be aware that chronic low sodium is not benign in older adults, even if the lab value is only a few points below normal.

Infants and Water Intoxication

Babies under six months old are uniquely vulnerable to hyponatremia because their kidneys are immature and cannot handle excess water effectively. Water intoxication in infants most often occurs when caregivers dilute formula more than instructed or give supplemental water between feedings. Infants in families experiencing poverty are especially at risk when formula is stretched with extra water to make it last longer. Even babies who are otherwise well can develop symptomatic hyponatremia, including seizures, from being given too much plain water.¹⁸

The home treatment for this problem is prevention, not correction. Infants should receive breast milk or properly mixed formula as their sole fluids for the first six months. If a baby has vomiting or diarrhea, the appropriate response is a pediatric oral rehydration solution, not plain water. If you suspect an infant has water intoxication (signs include irritability, drowsiness, low body temperature, or facial puffiness), this is an emergency requiring immediate medical attention. No home remedy is appropriate for a baby with suspected hyponatremia.

Psychogenic Polydipsia and Compulsive Water Drinking

Some people develop chronically low sodium because they compulsively drink enormous quantities of water, a condition called psychogenic polydipsia. This is most commonly seen in people with schizophrenia or other serious psychiatric conditions but can also occur in the general population among people who have adopted extreme hydration habits based on wellness trends or anxiety about dehydration.

Behavioral treatment can be effective. One case report documented an eight-week outpatient behavioral intervention that successfully maintained normal sodium levels in a primary care patient with chronic polydipsia. For patients with psychiatric conditions, managing polydipsia typically requires coordinating with a psychiatric team to address the underlying compulsive behavior through medication adjustment and behavioral strategies. In one hospitalized case involving a patient with schizophrenia and psychogenic polydipsia, sodium normalized over three weeks through a combination of fluid monitoring, behavioral management, and medications including a salt supplement.¹⁹

If you recognize yourself in this description, drinking many liters a day out of habit or anxiety rather than genuine thirst, it is worth getting a blood sodium check. Cutting back on fluid intake is the core fix, but understanding why you are overdrinking in the first place often requires professional help to sustain long-term change.

1
PubMed. Diagnosis and Management of Hyponatremia: A Review
2
PubMed Central. Pathophysiology and treatment of exercise-associated hyponatremia
3
PubMed Central. Salt Tablets Safely Increase Serum Sodium in Hospitalised Elderly Patients With Hyponatraemia Secondary to Refractory Idiopathic Syndrome of Inappropriate Anti-Diuresis
4
PubMed Central. Dietary salt in liver cirrhosis: With a pinch of salt!
5
European Journal of Endocrinology. Effect of protein supplementation on plasma sodium levels in the syndrome of inappropriate antidiuresis: a monocentric, open-label, proof-of-concept study—the TREASURE study
6
PubMed Central. Estimated Daily Urine Volume and Solute Excretion from Spot Urine Samples to Guide the Therapy of Hyponatremia in SIADH
7
Clinical Nutrition ESPEN. Palatability of two different formulations of urea for the treatment of hyponatremia: A double-blind, randomized, cross-over study
8
American Journal of Kidney Diseases. Efficacy and Safety of Urea Treatment in Patients With Hyponatremia Related to the Syndrome of Inappropriate Antidiuretic Hormone Secretion: A Systematic Review and Meta-Analysis
9
JAMA Network Open. Use of Urea for the Syndrome of Inappropriate Secretion of Antidiuretic Hormone: A Systematic Review
10
PubMed Central. Evaluation of hyponatremia among older adults exposed to selective serotonin reuptake inhibitors and thiazide diuretics
11
PubMed Central. Exercise-Associated Hyponatremia in Marathon Runners
12
PubMed Central. Sodium ingestion and hyponatraemia: sports drinks do not prevent a fall in serum sodium concentration during exercise
13
PubMed Central. Acute Severe Hyponatremia as a Serious Health Implication of Herbal Detox Regimens
14
Hong Kong Journal of Emergency Medicine. Is hyponatremia caused by Chinese herbal medicine a myth? A scoping review and a review of local data in Hong Kong
15
PubMed Central. Hyponatremia Correction and Osmotic Demyelination Syndrome Risk: A Systematic Review and Meta-Analysis
16
PubMed Central. Osmotic Demyelination Syndrome following Correction of Hyponatremia by ≤10 mEq/L per Day
17
PubMed. Mild chronic hyponatremia is associated with falls, unsteadiness, and attention deficits
18
Pediatrics. Hyponatremic Seizures Secondary to Oral Water Intoxication in Infancy: Association With Commercial Bottled Drinking Water
19
PubMed Central. Treatment of Psychogenic Polydipsia and Hyponatremia: A Case Report