Hyponatremia, low sodium levels and the risk of drinking too much water

Written by Mohan Garikiparithi
Published on

Hyponatremia, low sodium levels ...

Hyponatremia is a condition where a person has low sodium levels, which can increase the risk of drinking too much water. Sodium is an electrolyte and it helps regulate fluid levels in the body.

An underlying medical condition can be responsible for hyponatremia. This underlying medical condition can be that of drinking too much water, which causes sodium to become low and fluid levels to become high. When we intake high amounts of water our cells begin to swell, which can lead to health complications.

Treatment for hyponatremia focuses on treating the underlying condition, and you will also need to cut back on the amount of water you consume.

How much sodium and water does the body need?

The typical American diet loads us up with sodium, so it may seem strange that a person can actually have low sodium – but it is possible if consumption of water is high. Recommended sodium intake is 2,300 mg a
day, or 1,500 mg a day if you are over the age of 51. And yet, just a teaspoon of salt contains 2,325 mg, which alone puts you over the daily recommendation.

Water is also important for health; it makes up a large part of the body. Water helps keep the body functioning, but even something so essential can be overconsumed. Because we are constantly losing fluids through sweating, crying and even breathing, it’s important to replenish it. It’s advised that men consume 13 cups – or three liters – of water a day and women should stick with nine cups, or 2.2 liters.

As for what constitutes too much water, well, every person is different. Factors like athletic ability and time in which the water is consumed can play a role in drinking too much.

How to know if you drank too much water

If you’re concerned that you’re drinking too much water, there are signs you can look for. For example, your urine is a good indicator. If your urine is completely clear, that is a sign you’re overly hydrated. Additionally, if you drink water when you’re not thirsty, it can lead to overconsumption as well. Lastly, if you feel bloated or have actually put on weight based on how much water you consumed, that also indicates you drank too much.

Hyponatremia causes

Normal sodium levels in the body should range from 135 to 145 milliequivalents per liter (mEq/L). When sodium levels drop below 135 they are considered too low. Causes of hyponatremia are:

  • Medications like diuretics, antidepressants and pain killers
  • Heart, kidney and liver problems
  • Syndrome of inappropriate anti-diuretic hormone (SIADH) – water becomes retained instead of being expelled
  • Chronic, severe vomiting or diarrhea
  • Drinking too much water
  • Dehydration
  • Hormonal changes
  • Ecstasy – a psychoactive drug in the amphetamine class

Hyponatremia symptoms

Signs and symptoms of hyponatremia include:

  • Nausea and vomiting
  • Headache
  • Confusion
  • Loss of energy and fatigue
  • Restlessness and irritability
  • Muscle weakness, spasms or cramps
  • Seizures
  • Coma

Hyponatremia treatment

Hyponatremia is treated by focusing on the underlying cause of the condition. If hyponatremia is caused by fluid intake, it is advised to cut back on water consumption. A doctor may also change the use of diuretics in order to maintain sodium levels.

If hyponatremia is more severe, then more aggressive action must take place. This can involve the use of intravenous fluids, which provide sodium or medications to manage symptoms associated with hyponatremia.

Hyponatremia prevention

There are many ways to prevent hyponatremia from affecting you. Prevention tips include:

  • Treat conditions that can contribute to hyponatremia, like adrenal gland insufficiency.
  • Educate yourself and become aware of health conditions that may increase the risk of hyponatremia.
  • Be mindful when partaking in high-intensity activities – athletes are at high risk of hyponatremia due to excessive sweating and consuming too much water.
  • Replace water with sport drinks during high-intensity activities as they can replace essential electrolytes.
  • Drink water in moderation.

Related Reading:

Sodium potassium balance in diet critical for renal and cardiovascular health

For good cardiovascular health and renal health you need a proper sodium potassium balance in your diet. Balanced sodium and potassium levels have been shown to lower blood pressure and lower your risk of heart disease, heart attack and stroke. Unfortunately, the typical American diet contains too much sodium, which can lead to an unbalance between the two. Continue reading…

4 ways you’re drinking water wrong

Staying hydrated is essential for good health. A large percentage of our body is made up of water so keeping that supply full is important. It seems easy enough that to stay hydrated you should drink, but you could be hydrating yourself incorrectly. Continue reading…



On any matter relating to your health or well-being, please check with an appropriate health professional. No statement herein is to be construed as a diagnosis, treatment, preventative, or cure for any disease, disorder or abnormal physical state. The statements herein have not been evaluated by the Foods and Drugs Administration or Health Canada. Dr. Marchione and the doctors on the Bel Marra Health Editorial Team are compensated by Bel Marra Health for their work in creating content, consulting along with formulating and endorsing products.