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ORS Hydration – 24 Blackcurrant Tablets

ORS Hydration – 24 Blackcurrant Tablets

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  • ✔️ Restores electrolytes lost through sweat, illness, or exercise
  • ✔️ Blackcurrant flavour encourages consistent fluid intake when unwell
  • ✔️ Each tablet dissolves in 200ml water for rapid rehydration
  • ✔️ Suitable for adults and children needing electrolyte replacement
  • ✔️ Compact 24-tablet tube ideal for travel, gym, or home use

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What Are ORS Hydration Tablets and How Do They Help?

 

Staying properly hydrated is about more than just drinking water. When you sweat heavily, experience vomiting or diarrhoea, or simply forget to drink enough during a busy day, your body loses electrolytes — minerals like sodium and potassium that are essential for normal cell function. ORS hydration tablets are designed to address exactly that. Each blackcurrant-flavoured effervescent tablet dissolves in water to create a refreshing oral rehydration solution that replaces both fluids and the key electrolytes your body needs to recover. You can find this product and similar options in our vitamins and supplements collection.

The ORS brand has built a solid reputation in the UK for producing straightforward, no-fuss rehydration products. This pack contains 24 tablets, making it practical for home use, travel, or keeping in your gym bag. At £4.53, it represents genuine value for a clinically sound approach to managing dehydration.

 

How Do ORS Hydration Tablets Work in the Body?

 

The science behind oral rehydration therapy is well established. The NHS recognises oral rehydration solutions as the first-line approach for managing mild to moderate dehydration, particularly following illness. ORS hydration tablets work by exploiting a natural transport mechanism in the small intestine:

  • Glucose and sodium in the solution activate the sodium-glucose co-transporter (SGLT1) in the gut lining.
  • This co-transport draws water across the intestinal wall and into the bloodstream far more efficiently than plain water alone.
  • Potassium and bicarbonate help restore the body's electrolyte balance and correct mild acid-base disturbances caused by fluid loss.
  • The blackcurrant flavour makes the solution more palatable, which encourages consistent drinking — particularly useful when you feel unwell.

This mechanism, known as oral rehydration therapy (ORT), was developed decades ago and remains one of the most clinically validated approaches to treating dehydration worldwide.

 

Who Should Consider Using ORS Hydration Tablets?

 

These tablets are suitable for a wide range of people and situations. Whether you're recovering from a stomach bug, managing the effects of a hot day, or looking for a post-exercise recovery drink, ORS hydration tablets offer a practical solution. They're particularly useful for:

  • Adults and children experiencing mild to moderate dehydration from diarrhoea or vomiting
  • People who exercise regularly and lose significant electrolytes through sweat
  • Travellers who may be at higher risk of dehydration in hot climates — check our travel health range for more useful products
  • Individuals recovering from illness who struggle to maintain adequate fluid intake

They are not intended to replace medical treatment for severe dehydration, which requires urgent clinical assessment. If someone is unable to keep fluids down, is showing signs of severe dehydration (such as sunken eyes, no urination, or confusion), or is an infant, seek medical advice promptly.

 

How Do ORS Hydration Tablets Compare to Sachets?

 

Feature ORS Hydration Tablets Dioralyte Sachets
Format Effervescent tablet Powder sachet
Portability Very compact, easy to carry Bulkier, sachets can tear
Flavour options Blackcurrant (this pack) Blackcurrant, citrus, natural
Pack size 24 tablets Typically 6 or 20 sachets

 

Is This Product Suitable for Everyone, and How Should It Be Stored?

 

Most adults and children can use ORS hydration tablets safely, but there are some important considerations. People with kidney disease, heart conditions, or those on a sodium-restricted diet should speak to their GP or pharmacist before use, as the sodium content may not be appropriate for their condition. Similarly, individuals with rare metabolic conditions affecting glucose or electrolyte handling should seek medical advice first.

Store the tablets in a cool, dry place below 25°C, away from direct sunlight and moisture. Keep the tube tightly closed after each use to prevent the tablets from absorbing humidity, which can affect their effervescent action. Keep out of reach of children. Once dissolved in water, the solution should be consumed within one hour.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

ORS Hydration – 24 Blackcurrant Tablets specifications
Treatment category Rehydration / Electrolyte replacement
Mechanism of action Sodium-glucose co-transport to enhance intestinal water absorption
Effective for Mild to moderate dehydration from illness, exercise, or heat
Suitable for Adults and children (check age guidance on pack)
Active ingredients Sodium chloride, potassium chloride, sodium bicarbonate, glucose
Pack size 24 tablets
UK classification General Sale Medicine (GSL)
Preparation Effervescent tablet
Route of administration Oral (dissolved in water)

Specifications of ORS Hydration – 24 Blackcurrant Tablets

 

What Is ORS Hydration and What Is It Used For?

 

ORS Hydration Blackcurrant Tablets are an over-the-counter oral rehydration product used to prevent and treat mild to moderate dehydration. Each tablet contains a balanced combination of electrolytes — sodium, potassium, and bicarbonate — alongside glucose, which together help your body absorb water more effectively than drinking plain water alone.

The NHS recommends oral rehydration solutions as the first-line treatment for dehydration caused by diarrhoea and vomiting in both adults and children. These tablets are also used by people who lose fluids through excessive sweating during exercise or in hot weather, and by those who simply struggle to maintain adequate hydration during illness. If you're also managing symptoms like loose stools, you may find our diarrhoea treatments collection helpful alongside rehydration therapy.

 

What Do You Need to Know Before Using ORS Hydration Tablets?

 

Before using these tablets, it's important to check whether they are appropriate for you. Do not use ORS Hydration Tablets if any of the following apply:

  • You have been diagnosed with hypernatraemia (high blood sodium levels)
  • You have severe kidney impairment or are on dialysis
  • You have a condition requiring strict fluid restriction
  • You are allergic to any of the ingredients listed on the packaging
  • Your child is under the recommended age stated on the pack without first consulting a GP

The following groups should seek medical advice before use:

  • People with heart failure or high blood pressure managed with diuretics
  • Those with diabetes, due to the glucose content
  • Individuals on a low-sodium diet
  • Pregnant or breastfeeding women (generally considered safe, but always check with your midwife or GP)

Regarding drug interactions, no significant interactions are documented at standard doses for this type of oral rehydration product. However:

  • High potassium intake may interact with potassium-sparing diuretics (e.g. spironolactone) or ACE inhibitors — speak to your pharmacist if you take these
  • Sodium content may be relevant if you take lithium — consult your GP

 

How Should You Use ORS Hydration Tablets?

 

Using these tablets correctly is straightforward. Follow these steps each time you prepare a dose:

  1. Fill a clean glass or bottle with 200ml of water (cool or room temperature — not hot).
  2. Drop one tablet into the water.
  3. Wait for the tablet to fully dissolve — this usually takes around one to two minutes.
  4. Stir gently if needed, then drink the solution slowly.
  5. Consume the prepared solution within one hour of dissolving.
  6. Repeat as needed, following the dosage guidance below or as directed by your pharmacist.
Indication Age Group Dose Frequency
Dehydration from illness Adults & children over 12 1 tablet in 200ml water As needed; follow pack guidance
Post-exercise rehydration Adults 1 tablet in 200ml water After exercise or as required
General hydration support Adults & older children 1 tablet in 200ml water As directed on pack

Always read the full instructions on the packaging. If symptoms of dehydration persist or worsen after 24 hours, seek medical advice. For children under 12, consult a pharmacist or GP before use.

 

What Are the Possible Side Effects of ORS Hydration Tablets?

 

ORS Hydration Tablets are generally very well tolerated when used as directed. Side effects are uncommon, but it's worth knowing what to look out for.

Common side effects (may affect a small number of users):

  • Mild nausea, particularly if taken on an empty stomach
  • Bloating or a feeling of fullness
  • Mild stomach discomfort

Less common side effects (rare at recommended doses):

  • Vomiting — if this occurs, sip the solution very slowly in small amounts
  • Elevated blood sodium (hypernatraemia) if used excessively or in those with impaired kidney function
  • Allergic reaction — seek immediate medical attention if you notice rash, swelling, or difficulty breathing

If you experience any side effect that concerns you, stop use and speak to your pharmacist or GP. You can also report suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

 

How Should You Store ORS Hydration Tablets?

 

Correct storage keeps the tablets effective for their full shelf life. Follow these guidelines:

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and sources of heat or moisture
  • Always replace the cap firmly after removing a tablet
  • Do not store in a bathroom cabinet where humidity is high
  • Keep out of reach and sight of children
  • Do not use after the expiry date printed on the packaging
  • Once dissolved in water, consume the solution within one hour — do not store prepared solution

If you're travelling and need to manage your health kit, our first aid collection has a range of products to keep you prepared on the go.

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Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy ORS Hydration Blackcurrant Tablets online in the UK?

You can buy ORS Hydration Blackcurrant Tablets directly from Cured Pharmacy, a GPhC-registered UK online pharmacy, for £4.53 per pack of 24 tablets. No prescription is needed as this is a general sale medicine. Simply add to your basket and choose your preferred delivery option at checkout.

How do ORS hydration tablets work in the body?

ORS hydration tablets dissolve in water to create an oral rehydration solution containing sodium, potassium, bicarbonate, and glucose. The glucose and sodium work together via the sodium-glucose co-transporter (SGLT1) in the small intestine, pulling water into the bloodstream far more efficiently than plain water. This mechanism — known as oral rehydration therapy — is clinically validated and recommended by the NHS for managing dehydration.

How do I use ORS Hydration Tablets step by step?

Drop one tablet into 200ml of cool or room-temperature water and wait for it to fully dissolve, which takes around one to two minutes. Stir gently if needed, then drink the solution slowly. Prepare a fresh solution each time and consume it within one hour of dissolving the tablet.

What is the correct dose of ORS Hydration Tablets for adults?

Adults and children over 12 years should dissolve one tablet in 200ml of water per dose. The number of doses per day depends on the degree of fluid loss — always follow the instructions on the packaging or the advice of your pharmacist. Do not exceed the recommended daily intake stated on the pack.

When is the best time to take ORS Hydration Tablets?

Take ORS hydration tablets whenever you need to replace lost fluids — during or after exercise, during illness causing vomiting or diarrhoea, or in hot weather when you've been sweating heavily. There is no fixed time of day; use them as and when dehydration occurs or is likely. Sipping the solution slowly over time is more effective than drinking it all at once.

Are ORS Hydration Tablets safe for children?

ORS Hydration Tablets can be suitable for children, but you should always check the age guidance printed on the packaging before use. For children under 2 years of age, or if your child has an underlying health condition, consult your GP or pharmacist first. The NHS recommends oral rehydration solutions as the first-line treatment for dehydration in children caused by gastroenteritis.

Can I take ORS Hydration Tablets during exercise?

Yes — ORS hydration tablets are well suited to use during or after exercise, particularly in hot conditions or during prolonged physical activity where significant sweat loss occurs. They replace both fluids and the electrolytes lost through sweat, which plain water alone cannot do. They're a compact, convenient alternative to bulky sports drinks.

What are the side effects of ORS Hydration Tablets?

Side effects are uncommon when the tablets are used as directed. Some people may experience mild nausea, bloating, or stomach discomfort, particularly if they drink the solution too quickly. Rarely, excessive use in people with kidney problems could lead to electrolyte imbalance — if you have a kidney condition, speak to your GP before use.

Who should not use ORS Hydration Tablets?

These tablets are not suitable for people with hypernatraemia (high blood sodium), severe kidney impairment, or conditions requiring strict fluid restriction. People with diabetes should be aware of the glucose content and check with their pharmacist. Those taking potassium-sparing diuretics, ACE inhibitors, or lithium should also seek advice before use. You can browse our vitamins and supplements collection for alternative hydration support products.

How do I manage side effects of ORS Hydration Tablets?

If you feel nauseous after taking the solution, try sipping it very slowly in small amounts rather than drinking it all at once. Taking it with a small amount of food may also help settle your stomach. If side effects persist or you experience anything unusual such as swelling, rash, or difficulty breathing, stop use immediately and contact your pharmacist or GP.

What are the alternatives to ORS Hydration Tablets?

Common alternatives include Dioralyte sachets, Electrolade sachets, and other oral rehydration solutions available over the counter. The NHS also provides guidance on making a homemade rehydration drink in an emergency. Your pharmacist can help you choose the most appropriate option based on your specific situation and any health conditions you have.

Can I use ORS Hydration Tablets if I am pregnant?

Oral rehydration therapy is generally considered safe during pregnancy, and staying well hydrated is particularly important when you're expecting. However, you should always check with your midwife or GP before starting any new product during pregnancy, especially if you have any complications such as pre-eclampsia or gestational diabetes. They can confirm whether this product is appropriate for your individual circumstances.

How long can you use ORS Hydration Tablets for?

ORS Hydration Tablets can be used for as long as dehydration persists, but if symptoms such as diarrhoea or vomiting continue beyond 24 to 48 hours in adults, or sooner in children, you should seek medical advice. They are not intended as a long-term daily supplement without clinical reason. If you're managing a condition that causes ongoing fluid loss, speak to your GP about an appropriate management plan. You might also find our sickness and nausea range useful alongside rehydration therapy.

What happens if I miss a dose of ORS Hydration Tablets?

ORS Hydration Tablets are taken as needed rather than on a fixed schedule, so there is no "missed dose" in the traditional sense. If you realise you haven't been drinking enough fluid or replacing electrolytes, simply prepare and drink a solution as soon as you can. Continue to monitor your hydration levels and drink regularly throughout the day.

What does the latest research say about oral rehydration therapy?

Oral rehydration therapy (ORT) has been extensively studied for decades and remains one of the most clinically supported interventions for managing dehydration. The World Health Organisation and NHS both endorse ORT as the first-line approach for mild to moderate dehydration from gastroenteritis. Research consistently shows that the sodium-glucose co-transport mechanism makes ORT significantly more effective than plain water for restoring fluid balance in the body.

How Should You Use ORS Hydration Tablets?

Using ORS Hydration Blackcurrant Tablets correctly ensures you get the full benefit of the electrolyte formula. Always prepare a fresh solution each time — never use a solution that has been sitting for more than one hour, as it may become less effective and could harbour bacteria.

Follow these steps each time you prepare a dose:

What Is the Correct Dose of ORS Hydration Tablets?

The dose varies depending on your age and the reason you are using the tablets. Always follow the instructions on the packaging and do not exceed the recommended daily intake. If you are unsure, your pharmacist can advise on the appropriate number of doses for your situation.

When Is the Best Time to Use ORS Hydration Tablets?

There is no single fixed time of day to take ORS Hydration Tablets — they are used reactively, whenever fluid and electrolyte loss occurs or is anticipated. During illness, it helps to start rehydrating as soon as symptoms begin rather than waiting until you feel severely dehydrated. For exercise, taking a solution during or immediately after physical activity is most effective for recovery.

If you are using them in hot weather, sip the solution throughout the day rather than all at once. Spreading your intake helps your body absorb fluids steadily and avoids overloading your digestive system.

How Long Can You Use ORS Hydration Tablets For?

ORS Hydration Tablets are intended for short-term use during periods of fluid loss. For illness-related dehydration, continue using them until symptoms resolve and you can maintain normal fluid intake through food and drink. If diarrhoea or vomiting persists beyond 24 to 48 hours in adults, or sooner in young children, seek medical advice rather than continuing to self-treat.

For regular exercisers or those in hot climates, the tablets can be used as and when needed without a strict time limit, provided you are not exceeding the recommended daily dose. Long-term daily use without a clinical reason is not recommended — speak to your GP if you feel you need ongoing electrolyte supplementation.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of ORS Hydration Tablets?

ORS Hydration Tablets are generally very well tolerated when used as directed. Most people experience no side effects at all. However, a small number of users may notice mild gastrointestinal symptoms, particularly if they drink the solution too quickly or on an empty stomach.

  • Mild nausea
  • Bloating or a feeling of fullness
  • Mild stomach discomfort or cramping

What Are the Less Common Side Effects of ORS Hydration Tablets?

Less common side effects are rare at recommended doses but can occur, particularly in people who use the product excessively or who have underlying health conditions affecting kidney function or electrolyte balance.

  • Vomiting — if this occurs, try sipping the solution in very small amounts over a longer period
  • Elevated blood sodium (hypernatraemia) — more likely with excessive use or in those with impaired kidney function
  • Elevated blood potassium (hyperkalaemia) — a concern for those on potassium-sparing diuretics or ACE inhibitors
  • Fluid retention — possible in those with heart or kidney conditions

What Are the Serious Side Effects of ORS Hydration Tablets?

Serious side effects are very rare with this type of product when used correctly. However, you should be aware of the signs of an allergic reaction, which — though uncommon — can occur with any medicine or supplement. Seek emergency medical attention immediately if you experience any of the following:

  • Skin rash, hives, or itching
  • Swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • Sudden dizziness or collapse

You can report any suspected side effects to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk.

What Should You Do If You Experience Side Effects?

If you notice mild side effects such as nausea or bloating, try slowing down how quickly you drink the solution. Sipping it gradually over 15 to 20 minutes rather than drinking it all at once can make a significant difference. If symptoms are more troublesome or do not settle, stop using the product and speak to your pharmacist or GP. Never ignore side effects that feel unusual or severe.

Can ORS Hydration Tablets Interact With Other Medicines?

No significant drug interactions are documented for ORS Hydration Tablets at standard doses. That said, the electrolyte content means certain medicines warrant caution. The potassium in the tablets may interact with potassium-sparing diuretics (such as spironolactone or amiloride) and ACE inhibitors (such as ramipril or lisinopril), potentially raising blood potassium to unsafe levels. The sodium content may be relevant if you take lithium, as sodium levels can affect lithium excretion. Always inform your pharmacist of all medicines you are taking before starting any new product.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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