Frequently Asked Questions


» What is Dehydration?

The body requires the correct balance of fluid and electrolytes (salts and minerals) to maintain everyday functions and preserve health. Internally, the body has special mechanisms which help to keep this balance in check. However, the loss of fluid and electrolytes through urine, sweat, vomit, diarrhea and other bodily fluids can upset this balance, and in some cases, a person may experience dehydration. The signs and symptoms of mild to moderate dehydration will occur when as little as 2% of the body weight is lost through fluid.

» What are the signs and symptoms of dehydration?

There are many different signs and symptoms of moderate dehydration. These include:

  • Increased thirst
  • Fatigue / Lethargy
  • Dizziness
  • Headaches
  • Dark or decreased urine output
  • Sticky or dry mouth
  • Loss of skin elasticity
  • Irritability

Try to recognize the common signs and symptoms of dehydration. If and when they occur, start using an oral rehydration solution, Hydralyte, as soon as possible.

Remember that dehydration can be of particular concern for the elderly and for young children.

» How does dehydration occur?

Dehydration occurs when there is the loss of fluid and electrolytes from the body at a faster rate than they are being replaced. Fluid and electrolyte loss can occur through urine, sweat, vomit and diarrhea.

» Does excessive sweating cause dehydration?

The loss of fluid and electrolytes through sweat can lead to dehydration in some circumstances.
When excessive sweating is caused by vigorous or prolonged physical activity (i.e. during endurance sport or exercise), dehydration may occur. This can happen if adequate fluid consumption (with an appropriate hydration fluid) does not occur.

In cases where excessive sweating is due to a fever, there is also a chance of dehydration if adequate hydration is not achieved.

» Is it possible to be dehydrated and not realize? If so how (aside from thirst) would you know?

Sometimes we just forget to eat or drink enough, and dehydration can happen without realizing. Often thirst is one of the later symptoms of dehydration to appear. By the time we get thirsty, we can already be moderately dehydrated. Some earlier signs of dehydration are sticky or dryness of the mouth, decreased urine output, and dark yellow colored urine.

» Can dehydration cause diarrhea?

Diarrhea is a common cause of moderate dehydration. Dehydration does not itself cause diarrhea.

» Why does your head hurt when you are dehydrated?

One of the common symptoms of moderate dehydration is a headache. If you are experiencing a headache, consider whether dehydration could be the cause. If you are experiencing dehydration use a clinical rehydration formula (such as Hydralyte) which will restore the body’s fluid and electrolyte levels and relieve any dehydration present.


» How long after exercising should I rehydrate?

When you are planning to exercise, you should ensure that you start in a well hydrated state. To ensure you are well hydrated, aim to drink 8 glasses of water a day. Then, during exercise your fluid intake should match your fluid outlay. A good tip is to take 2 to 3 sips of an oral rehydration solution (such as Hydralyte) while performing sustained moderate to vigorous physical activity – this will help to prevent potential dehydration.

» What are some tips to rehydrate efficiently once you become dehydrated?

If you are experiencing dehydration, you need to act fast and drink an effective rehydration solution. The best option is a scientifically formulated oral rehydration solution (like Hydralyte) as this contains the correct balance of sugar and salt, to ensure that you rapidly restore what the body has lost. Oral rehydration solutions are formulated based on the World Health Organization guidelines for rapid and effective rehydration. It is important to start drinking these products as soon as you notice any signs of dehydration (such as dry mouth, dizziness, fatigue), and sip small amounts at regular intervals to enhance absorption (better than drinking a large bottle all at the one time. You should also monitor yourself for the signs and symptoms of more severe dehydration (such as fainting or very low blood pressure) – if these happen you should seek medical advice as soon as possible.

» What is the fastest way to rehydrate our body?

To rapidly rehydrate the body, you need to consume a hydration beverage that contains the correct balance of glucose and electrolytes for fast and effective absorption. The World Health Organization suggests an oral rehydration solution (such as Hydralyte), which provides fast and effective restoration of both fluid and electrolytes. In situations where you are fluid and electrolyte depleted (such as in cases of stomach flu, heavy sweating or other illnesses) an oral rehydration solution may provide fast and effective rehydration.


» How do you know if you are hydrated?

One way to tell if you are well hydrated is to monitor your body for any signs and symptoms of dehydration, such as:

  • Increased thirst
  • Fatigue / Lethargy
  • Dizziness
  • Headaches
  • Dark or decreased urine output
  • Sticky or dry mouth
  • Loss of skin elasticity
  • Irritability


» Where can I find Hydralyte?

You can find Hydralyte at multiple fine retailers including Rite Aid, HEB, Giant Eagle & Bartell Drugs. Hydralyte is also available to purchase online at, and

» What are the main ingredients in Hydralyte?

Hydralyte contains a variety of ingredients. The main ingredients are glucose, sodium, potassium, chloride and citrate. Each Hydralyte product format and flavor contains different ingredients. Please refer to our product packaging or visit the relevant product pages below for the full list of ingredients:

Hydralyte Effervescent Electrolyte Tablets

Hydralyte Oral Electrolyte Solution

Hydralyte Oral Electrolyte Powder

» How do I take Hydralyte and how long for (i.e. what are the directions for use)?

Please refer to our product packaging for directions for use. Alternatively, please look at this information on the product pages:

Hydralyte Effervescent Electrolyte Tablets

Hydralyte Oral Electrolyte Solution

Hydralyte Oral Electrolyte Powder

» How do I use Hydralyte Effervescent Electrolyte Tablets?

Use under medical supervision.

  • Remove two tablets from tube and replace the cap tightly. Dissolve the tablets into 200 mL (7 fl oz) of water.
  • Sip slowly and frequently while symptoms persist. Discard unused solution after 2 hours, or 24 hours if refrigerated.
  • Always dissolve in water. Never place tablet directly into mouth.
  • Do not use if cap seal is broken. Replace the cap tightly after use.

For full directions of use (for vomiting and diarrhea or fever or heavy sweating) refer to the product page here.

» Are hydration tablets the same as hydration drinks?

In the Hydralyte range, there are ready to drink solutions, powder packets and effervescent tablets. When these are consumed according to the directions for use on packaging, they are all equally effective to prevent and relieve dehydration.

» Is Hydralyte more effective than rehydrating with water?

Firstly, water is the best hydration fluid to consume on a daily basis, as part of a healthy, well-balanced diet. However, if you experience dehydration there are many rehydration drinks available. Oral rehydration solutions (such as Hydralyte) are clinically formulated to contain the correct balance of fluid and electrolytes. This allows for faster and more effective absorption of fluid and electrolytes by the body, and as a result, dehydration can be corrected very quickly.

» Does Hydralyte contain added sugars?

Hydralyte contains glucose at a low concentration, sufficient for successful rehydration. The sweetener in Hydralyte is sucralose, a modified form of table sugar.

» What is the source of glucose in Hydralyte?

The source of glucose in Hydralyte is corn (also called maize).

» How many calories does Hydralyte contain?

There are 80 food calories in 1 Liter (1.1 QT) of solution prepared from Hydralyte Oral Electrolyte Powders and Oral Solutions.

There are 110 food calories in 1 Liter (1.1 QT) of solution prepared from Hydralyte Effervescent Electrolyte Tablets.

» What is the sweetener in Hydralyte?

Hydralyte contains sucralose, a modified form of table sugar.

» Does Hydralyte contain isomalt, sodium saccharin or aspartame?

Hydralyte does not contain isomalt, sodium saccharin or aspartame.

» Does Hydralyte contain fructose?

Hydralyte does not contain any added fructose. However it contains natural flavors that may contain small quantities of fructose. If you suffer from dietary fructose intolerance (malabsorption), Hydralyte will generally be well-tolerated. Should any unpleasant symptoms arise, cease taking the product. If you suffer hereditary fructose intolerance, consult your healthcare professional before use.

» What are the preservatives used in Hydralyte?

Hydralyte Oral Electrolyte Powder and Hydralyte Effervescent Electrolyte Tablets DO NOT contain any preservatives.

Hydralyte Oral Electrolyte Solutions contain small amounts of potassium sorbate and sodium benzoate to prevent product spoilage. Both of these ingredients are found naturally in fruits such as oranges, lemons and cranberries, and help protect the fruit from mould.

» Are the colors and flavors in Hydralyte natural?

Hydralyte Oral Electrolyte Powder and Hydralyte Effervescent Electrolyte Tablets:

  • Orange: Natural orange flavor, natural color (powder) synthetic color (effervescent)
  • Berry: Natural and artificial flavor, natural grape anthocyanin color
  • Lemonade: Lemon lime flavor with other natural flavors, natural color

Hydralyte Oral Electrolyte Solutions:

(Note – all colors used are approved artificial (synthetic) colors). All artificial colors are FDA batch certified.

  • Orange: Yellow 6, orange flavor with other natural flavors
  • Berry: Red 40, Blue 1, berry flavor with other natural flavors
  • Lemonade: No color, lemon lime flavor with other natural flavors

» Does Hydralyte contain salicylates?

  • There are no salicylates ADDED to Hydralyte (some other products use it as a preservative).
  • Hydralyte contains natural flavors, which are extracts of fruit; and fruit naturally contains some salicylates. Oranges and blackcurrants for example contain small concentrations.
  • Our flavor supplier advises that the level of salicylates is either very small or there are none in our orange flavor. (The supplier does not routinely measure salicylates).
  • Please consult your doctor if you have salicylates intolerance.

» Is Hydralyte gluten and wheat free?

Yes, all forms of Hydralyte are gluten and wheat free.

» Does Hydralyte contain yeast or traces of nuts?

Hydralyte does not contain any yeast or traces of nuts.

» Does Hydralyte contain genetically modified ingredients?

Hydralyte does not contain any genetically modified ingredients.

» Does Hydralyte contain lactose (milk sugar) or dairy products?

Hydralyte does not contain any lactose or dairy products.

» Is Hydralyte suitable for vegetarians and vegans?

Hydralyte is suitable for vegetarians and vegans.

» Does Hydralyte has a Kosher or Halal certificate?

We don’t have a Kosher or Halal certificate, but we can advise you that Hydralyte does not contain animal-derived ingredients.

Hydralyte is also parve (free of meat and dairy products).

» How long can I use Hydralyte after opening or preparation?

Please refer to label/packaging.

  • Hydralyte Ready to Use Flavored Electrolyte Solutions – Refrigerate after opening and discard 1 month after opening.
  • Hydralyte Flavored Electrolyte Powders and Hydralyte Effervescent Electrolyte Tablets – 2 hours after preparation (or 24 hours after preparation if refrigerated).

» Can I take too much Hydralyte?

Patients should not take more Hydralyte than is advised on the packaging. Please refer to Hydralyte packaging for usage directions.

» Is Hydralyte suitable for pregnant or breastfeeding mothers?

Please consult your physician before use if pregnant or breastfeeding.

» Is Hydralyte suitable for children under 12 months?

For children under under 12 months please consult your physician.

» The label says ‘use under medical supervision’ - what does this mean?

Hydralyte is a medical food.

As such, it is a food formulated to be used under the supervision of a healthcare professional for the dietary management of dehydration.