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ORS Hydration – 12 Blackcurrant Tablets

ORS Hydration – 12 Blackcurrant Tablets

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  • ✔️ Restores electrolytes lost through diarrhoea, vomiting, or sweating
  • ✔️ Blackcurrant flavour encourages adequate fluid intake when unwell
  • ✔️ Effervescent tablet dissolves in 200 ml water for rapid absorption
  • ✔️ Suitable for adults and children aged 12 and over
  • ✔️ Portable 12-tablet pack ideal for travel, sport, and home use

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What Are ORS Hydration Tablets?

 

Staying properly hydrated is about more than just drinking water. When you sweat, vomit, or experience diarrhoea, your body loses not only fluid but also essential electrolytes — salts and minerals that keep your cells functioning correctly. ORS hydration tablets are a convenient, effervescent way to replenish those lost electrolytes quickly and effectively. Each blackcurrant-flavoured tablet dissolves in water to create a refreshing oral rehydration solution that your body can absorb rapidly. At just £5.89 for 12 tablets, they're an accessible option to keep at home, in your gym bag, or when travelling. You can explore a wider range of similar products in our vitamins and supplements collection.

Dehydration is more common than many people realise. The NHS notes that mild dehydration can cause headaches, fatigue, and difficulty concentrating — symptoms that are easy to dismiss but simple to address with the right rehydration support. Whether you're recovering from a stomach bug, exercising in warm weather, or simply not drinking enough throughout the day, ORS hydration tablets offer a straightforward solution.

 

How Do ORS Hydration Tablets Work?

 

The science behind oral rehydration is well established. These tablets work by harnessing a process called sodium-glucose co-transport. When glucose and sodium are present together in the gut in the correct ratio, the intestinal wall actively draws both into the bloodstream — and water follows. This mechanism is significantly more efficient than drinking plain water, which is absorbed more passively.

  • Each tablet contains a balanced ratio of sodium, potassium, glucose, and bicarbonate.
  • Dissolved in 200 ml of water, the tablet creates an isotonic-like solution.
  • Electrolytes are absorbed via the sodium-glucose co-transporter in the small intestine.
  • Fluid balance is restored at a cellular level, not just in the gut.
  • The blackcurrant flavour makes the solution more palatable, encouraging adequate intake.

 

Who Should Use ORS Hydration Tablets?

 

These tablets are suitable for a wide range of people. They're particularly useful if you're dealing with fluid loss from illness, physical exertion, or hot weather. They're also a practical choice for anyone who finds plain water difficult to drink in large quantities when unwell.

  • Adults and older children experiencing mild to moderate dehydration.
  • People recovering from vomiting or diarrhoea.
  • Athletes or gym-goers replacing electrolytes lost through sweat.
  • Travellers at risk of dehydration in hot climates — check our travel health range for more support.

 

How Do ORS Hydration Tablets Compare to Rehydration Sachets?

 

Feature ORS Hydration Tablets Rehydration Sachets (e.g. Dioralyte)
Format Effervescent tablet Powder sachet
Portability Compact, easy to carry Bulkier, can tear or spill
Flavour Blackcurrant Various (blackcurrant, citrus, natural)
Preparation Drop in water, dissolves quickly Mix powder into measured water

 

Are ORS Hydration Tablets Suitable for Storage at Home?

 

Yes. These tablets are designed for easy home storage. Keep them in a cool, dry place below 25°C, away from direct sunlight and moisture. Because they're effervescent, it's important to reseal the tube tightly after each use — exposure to humidity can cause the tablets to fizz prematurely and degrade. They make a sensible addition to any home first aid kit, particularly during winter illness season when dehydration from colds and flu is common.

If you're managing a condition that affects your fluid balance — such as kidney disease or heart failure — speak to your GP or pharmacist before using ORS hydration tablets. They are generally well tolerated, but electrolyte supplementation requires care in certain clinical situations.

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 – 12 Blackcurrant Tablets specifications
Treatment category Rehydration / Electrolyte replacement
Mechanism of action Sodium-glucose co-transport to enhance intestinal fluid 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 12 tablets
UK classification General Sale / Supplement
Preparation Effervescent tablet
Route of administration Oral (dissolved in water)

Specifications of ORS Hydration – 12 Blackcurrant Tablets

 

What Is ORS Hydration and What Is It Used For?

 

ORS Hydration Blackcurrant Tablets are an oral rehydration supplement used to replace fluids and electrolytes lost during dehydration. They are suitable for use in adults and children experiencing fluid loss caused by diarrhoea, vomiting, excessive sweating, or insufficient fluid intake. Each effervescent tablet dissolves in water to produce a solution containing sodium, potassium, glucose, and bicarbonate — the key components needed to restore the body's fluid and electrolyte balance. The NHS recommends oral rehydration solutions as the first-line approach for managing dehydration caused by gastroenteritis in both adults and children.

These tablets are not a treatment for the underlying cause of dehydration. They support recovery by replacing what's been lost. If symptoms of dehydration are severe — such as confusion, rapid heartbeat, or no urination for eight or more hours — seek medical attention promptly rather than relying solely on ORS hydration tablets.

 

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 your situation. Most healthy adults can use them without issue, but certain conditions require extra caution.

Do not use if you:

  • Have been diagnosed with hypernatraemia (high blood sodium levels).
  • Have severe kidney impairment or are on dialysis.
  • Have been told to restrict your potassium or sodium intake by a doctor.
  • Are allergic to any of the listed ingredients.
  • Have intestinal obstruction or ileus.

Use with caution if you:

  • Have heart failure or liver cirrhosis, where fluid retention is a concern.
  • Are taking medications that affect electrolyte levels, such as diuretics or ACE inhibitors.
  • Are pregnant or breastfeeding — consult your pharmacist or GP first.

Known drug interactions:

  • Diuretics (water tablets) — may alter sodium and potassium balance.
  • ACE inhibitors and angiotensin receptor blockers — potassium levels may be affected.
  • Corticosteroids — may influence sodium retention.

 

How Should You Use ORS Hydration Tablets?

 

Using these tablets correctly ensures you get the full benefit of the electrolyte formula. Always read the label before use and follow the steps below.

  1. Fill a clean glass with 200 ml of cool or room-temperature water.
  2. Drop one tablet into the water and wait for it to fully dissolve — this usually takes around one to two minutes.
  3. Stir gently if needed, then drink the solution slowly.
  4. Repeat as required, following the dosage guidance below.
  5. Do not crush or swallow the tablet whole — it must be dissolved in water first.
Indication Age Group Dose Frequency
Mild dehydration (illness) Adults & children 12+ 1 tablet in 200 ml water As needed, up to pack guidance
Exercise / heat Adults 1 tablet in 200 ml water Before, during, or after activity
Diarrhoea / vomiting Adults & children 12+ 1 tablet in 200 ml water After each loose stool or episode

If you are managing diarrhoea alongside rehydration, you may also find our diarrhoea treatments collection helpful for additional symptom relief.

 

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:

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

Less common side effects:

  • Vomiting — if this occurs, wait 10 minutes before trying again with smaller sips.
  • Hypernatraemia (raised blood sodium) — only likely if used excessively or in those with kidney problems.
  • Hyperkalaemia (raised blood potassium) — rare, but possible in those with kidney impairment.

If you notice swelling, difficulty breathing, or a rapid or irregular heartbeat after use, stop immediately and seek medical advice. These could indicate an electrolyte imbalance requiring prompt attention.

 

How Should You Store ORS Hydration Tablets?

 

Correct storage keeps the tablets effective and safe to use. Because they are effervescent, moisture is the main enemy — even a small amount of humidity can trigger the fizzing reaction prematurely.

  • Store below 25°C in a cool, dry place.
  • Keep away from direct sunlight and sources of heat.
  • Always reseal the tube tightly after removing a tablet.
  • Keep out of reach and sight of children.
  • Do not use after the expiry date printed on the packaging.
  • Do not store in a bathroom cabinet — humidity from showers can degrade the tablets.

For those managing ongoing health conditions that affect hydration — such as those monitoring blood glucose levels — our diabetes monitoring range offers complementary tools to support your health routine.

Written and reviewed by our qualified team

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 tablets online in the UK?

You can buy ORS Hydration Blackcurrant Tablets directly from Cured Pharmacy online without a prescription. They are available as an over-the-counter supplement and can be ordered for home delivery. Simply add them to your basket and check out securely through the Cured Pharmacy website.

How do ORS hydration tablets work in the body?

ORS hydration tablets work by using the sodium-glucose co-transport mechanism in the small intestine. When sodium and glucose are present together in the correct ratio, the intestinal wall actively absorbs both — and water follows, restoring fluid balance at a cellular level. This process is considerably more efficient than drinking plain water alone, which is why oral rehydration solutions are recommended by the NHS for dehydration caused by illness.

How do I use ORS hydration tablets step by step?

Drop one tablet into 200 ml of cool or room-temperature water and allow it to fully dissolve before drinking — this takes around one to two minutes. Drink the solution slowly rather than all at once, particularly if you are feeling nauseous. Repeat as needed according to the pack instructions or your pharmacist's advice.

What is the correct dose of ORS hydration tablets for adults?

Adults and children aged 12 and over should dissolve one tablet in 200 ml of water per dose. The number of doses per day will depend on the reason for use — for example, after each episode of diarrhoea or vomiting, or before and after exercise. Always follow the dosage guidance on the packaging and do not exceed the recommended daily intake.

Can children take ORS hydration tablets?

ORS hydration tablets may be suitable for children aged 12 and over, but you should always check the age guidance printed on the packaging before use. For younger children, a pharmacist or GP should be consulted before giving any oral rehydration product. The NHS recommends oral rehydration solutions for children with gastroenteritis, but the specific formulation and dose should be appropriate for the child's age and weight.

Are ORS hydration tablets suitable during pregnancy?

If you are pregnant and experiencing dehydration due to morning sickness or illness, speak to your midwife, GP, or pharmacist before using ORS hydration tablets. While electrolyte replacement is often necessary during pregnancy, it is important to confirm the product is appropriate for your individual circumstances. Do not self-treat severe dehydration during pregnancy without medical guidance.

Can I take ORS hydration tablets during or after exercise?

Yes, ORS hydration tablets are well suited for use during or after physical activity to replace electrolytes lost through sweat. Dissolve one tablet in 200 ml of water and drink before, during, or after exercise depending on your needs. They are a convenient alternative to bulky sports drinks, particularly for those who train outdoors or travel to competitions. You might also find our vitamins and supplements range useful for broader sports nutrition support.

What are the side effects of ORS hydration tablets?

Side effects are uncommon when ORS hydration tablets are used as directed. Some people may experience mild nausea, bloating, or stomach discomfort, particularly if taken on an empty stomach. Rarely, excessive use in people with kidney problems could lead to electrolyte imbalances — if you have a kidney condition, always speak to your GP before use.

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 forget to take one after an episode of diarrhoea or vomiting, simply take one as soon as you remember and continue drinking fluids regularly. Do not double up on doses to compensate.

What are the alternatives to ORS hydration tablets?

Alternatives include oral rehydration sachets such as Dioralyte, ready-made electrolyte drinks, or isotonic sports beverages. ORS tablets are generally more portable and convenient than sachets, as they don't require measuring powder. For illness-related dehydration, the NHS recommends purpose-made oral rehydration solutions over sports drinks, which may contain too much sugar and too little sodium.

How long can you use ORS hydration tablets for?

ORS hydration tablets can be used for as long as dehydration persists, provided you are following the recommended dosage. For illness-related dehydration such as gastroenteritis, the NHS advises continuing oral rehydration until symptoms resolve — typically within a few days. If dehydration continues beyond 48 to 72 hours or worsens, seek medical advice rather than continuing to self-treat.

Are ORS hydration tablets suitable for people with diabetes?

ORS hydration tablets contain glucose, which may affect blood sugar levels in people with diabetes. If you have diabetes and need to manage dehydration, speak to your GP or pharmacist before use to ensure the glucose content is appropriate for your management plan. Those monitoring their condition closely may find our diabetes monitoring tools helpful alongside any rehydration strategy.

Do ORS hydration tablets interact with any medications?

ORS hydration tablets may interact with medications that affect electrolyte levels, including diuretics, ACE inhibitors, angiotensin receptor blockers, and corticosteroids. If you are taking any of these medicines, consult your pharmacist before use. At standard doses in otherwise healthy adults, interactions are unlikely, but caution is always advisable.

What is the best time to take ORS hydration tablets?

The best time to take ORS hydration tablets depends on why you need them. For illness, take one after each episode of vomiting or diarrhoea. For exercise, take one before or during prolonged physical activity in warm conditions. For general dehydration, take one whenever you notice symptoms such as headache, fatigue, or dark urine.

What does the latest research say about oral rehydration solutions?

Oral rehydration therapy has been endorsed by the World Health Organisation and NHS for decades as the most effective non-intravenous treatment for dehydration caused by diarrhoea and vomiting. Research consistently shows that the sodium-glucose co-transport mechanism makes ORS solutions significantly more effective than plain water for restoring fluid balance. The formulation used in ORS products is based on well-established clinical evidence and remains the standard of care for mild to moderate dehydration worldwide.

How Should You Use ORS Hydration Tablets?

Using ORS Hydration Blackcurrant Tablets correctly is straightforward, but a few simple steps make a real difference to how well they work. Always read the label before use and ensure the tablet is fully dissolved before drinking the solution.

What Is the Correct Dose of ORS Hydration Tablets?

The correct dose depends on your age and the reason you are using the tablets. Always follow the guidance on the packaging. Do not exceed the recommended number of tablets per day without speaking to a pharmacist or GP first.

When Is the Best Time to Use ORS Hydration Tablets?

Timing your use of ORS hydration tablets to match your body's needs makes them more effective. For illness, take one after each episode of diarrhoea or vomiting to replace what has been lost. For exercise, taking one before a long session in warm conditions can help prevent dehydration before it starts, rather than trying to catch up afterwards. If you notice early signs of dehydration — such as a dry mouth, headache, or dark-coloured urine — that's a good prompt to dissolve a tablet and drink it promptly.

There is no fixed time of day that is universally "best." The key is responding to your body's signals and using the tablets consistently whenever fluid and electrolyte loss is occurring.

How Long Can You Use ORS Hydration Tablets For?

You can continue using ORS hydration tablets for as long as dehydration persists, provided you stay within the recommended daily dose. For short-term illness such as a stomach bug, most people find they only need them for two to three days until symptoms resolve. For regular exercisers or those in hot climates, they can be used on an ongoing basis as part of a hydration routine.

However, if dehydration symptoms persist beyond 48 to 72 hours despite using ORS tablets, or if symptoms worsen at any point, you should seek medical advice. Prolonged dehydration can indicate an underlying condition that requires proper assessment and treatment.

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. That said, a small number of users may notice mild gastrointestinal symptoms, particularly when first using the product or if taken on an empty stomach.

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

These effects are usually short-lived and resolve on their own. Drinking the solution slowly rather than all at once can help reduce the likelihood of nausea.

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 tablets excessively or who have underlying health conditions affecting kidney function or electrolyte balance.

  • Vomiting — if this occurs, wait 10 minutes before trying again with smaller sips.
  • Raised blood sodium (hypernatraemia) — more likely with excessive use or in those with impaired kidney function.
  • Raised blood potassium (hyperkalaemia) — rare, but possible in people with kidney disease.
  • Fluid retention — possible in those with heart failure or liver disease if large volumes are consumed.

What Are the Serious Side Effects of ORS Hydration Tablets?

Serious side effects are very uncommon with ORS hydration tablets used at the recommended dose in otherwise healthy individuals. However, you should stop use and seek urgent medical attention if you experience any of the following, as they may indicate a significant electrolyte imbalance.

  • Swelling of the face, lips, or throat (possible allergic reaction).
  • Rapid, irregular, or pounding heartbeat.
  • Muscle weakness or cramps that are severe or worsening.
  • Confusion or altered consciousness.
  • Difficulty breathing.

What Should You Do If You Experience Side Effects?

If you experience mild side effects such as nausea or bloating, try drinking the solution more slowly and ensure you have eaten something beforehand if possible. Most mild symptoms will settle without any intervention. If side effects persist or concern you, stop using the tablets and speak to your pharmacist or GP.

For any serious symptoms — particularly those involving the heart, breathing, or consciousness — stop use immediately and call 999 or go to your nearest A&E department. Do not wait to see if symptoms improve on their own.

Can ORS Hydration Tablets Interact With Other Medicines?

ORS hydration tablets contain electrolytes including sodium and potassium, which can interact with certain medicines that affect how the body handles these minerals. If you are taking any of the following, speak to your pharmacist before use.

  • Diuretics (water tablets) — may alter sodium and potassium balance unpredictably.
  • ACE inhibitors or angiotensin receptor blockers — potassium levels may be affected.
  • Corticosteroids — may influence sodium retention.
  • Digoxin — electrolyte changes can affect how this heart medicine works.

At standard doses in healthy adults, interactions are unlikely. However, if you are on regular medication for a heart, kidney, or blood pressure condition, always check with a healthcare professional before starting any electrolyte supplement.

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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