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Eno Fruit Salts Original - 150g

Eno Fruit Salts Original - 150g

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  • ✔️ Relieves heartburn, indigestion, and trapped wind fast
  • ✔️ Effervescent formula neutralises excess stomach acid quickly
  • ✔️ Suitable for adults and young people aged 12 and over
  • ✔️ 150g tub provides multiple doses for ongoing symptom relief
  • ✔️ No prescription needed — available over the counter

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What Are Eno Fruit Salts and How Do They Help?

 

Eno fruit salts have been a trusted household remedy for generations, and it's easy to see why. This effervescent antacid powder dissolves quickly in water to provide fast-acting relief from the discomfort of indigestion, heartburn, and trapped wind. At just £2.98 for a 150g tub, it's an affordable option that many people keep in their kitchen cupboard for those moments after a heavy meal when your stomach starts to protest. If you regularly deal with digestive discomfort, you might also want to explore our wider range of indigestion remedies available at Cured Pharmacy.

Indigestion is incredibly common. It can cause bloating, a burning sensation in the chest or upper abdomen, and that uncomfortable feeling of fullness that just won't shift. Eno fruit salts offer a simple, well-established way to tackle these symptoms without needing a prescription.

 

How Do Eno Fruit Salts Work to Relieve Symptoms?

 

The mechanism behind Eno fruit salts is straightforward but effective. When you dissolve the powder in water, a chemical reaction occurs between the active ingredients, producing carbon dioxide bubbles — that familiar fizz. This reaction neutralises excess stomach acid, which is the root cause of most indigestion and heartburn symptoms.

  • Citric acid reacts with sodium bicarbonate and sodium carbonate in water
  • The reaction produces carbon dioxide, creating the effervescent effect
  • Sodium bicarbonate and sodium carbonate act as antacids, raising the pH of stomach contents
  • Neutralising excess acid reduces the burning sensation associated with heartburn and indigestion
  • The fizzing action may also help to release trapped wind

 

Who Is Eno Fruit Salts Suitable For?

 

Eno fruit salts are suitable for most adults and children aged 12 and over who experience occasional indigestion, heartburn, or trapped wind. They're particularly useful after eating a large or rich meal, or when you've eaten too quickly. That said, they're not appropriate for everyone — see the contraindications section below for full details.

  • Adults and young people aged 12 and over
  • People experiencing occasional heartburn or acid indigestion
  • Those with trapped wind or bloating after meals
  • Anyone looking for a quick-dissolving, easy-to-take antacid option

 

How Do Eno Fruit Salts Compare to Other Antacid Remedies?

 

Feature Eno Fruit Salts Original 150g Gaviscon Advance Liquid
Form Effervescent powder dissolved in water Ready-to-drink liquid
Primary action Neutralises stomach acid Forms a raft barrier over stomach contents
Suitable for trapped wind Yes — effervescent action helps release gas Less directly targeted at wind
Price (approx.) £2.98 for 150g £6–£9 for 500ml

 

How Should You Store Eno Fruit Salts?

 

Store your tub of Eno fruit salts below 25°C in a dry place, away from direct sunlight and moisture. The bathroom cabinet might seem convenient, but steam from showers can affect the powder's quality over time — a kitchen cupboard away from the hob is a better choice. Always keep the lid tightly closed after use.

Check the expiry date printed on the base of the tub before use. If the powder has clumped together or changed colour, do not use it. Keep out of reach and sight of children. If you're also managing other digestive conditions, our IBS and cramps collection may have additional products worth considering alongside your antacid.

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.

Eno Fruit Salts Original 150g specifications
Treatment category Antacid / Indigestion relief
Mechanism of action Neutralises excess stomach acid via effervescent reaction
Effective for Indigestion, heartburn, trapped wind
Suitable for Adults and children aged 12 and over
Active ingredients Sodium bicarbonate, Sodium carbonate, Citric acid
Pack size 150g
UK classification General Sale List (GSL)
Drug class Antacid
Preparation Effervescent powder
Route of administration Oral (dissolved in water)

Specifications of Eno Fruit Salts Original 150g

 

What Is Eno Fruit Salts Original and What Is It Used For?

 

Eno Fruit Salts Original is an over-the-counter effervescent antacid powder used to relieve the symptoms of indigestion, heartburn, and trapped wind. It contains three active ingredients — sodium bicarbonate, sodium carbonate, and citric acid — which work together to neutralise excess stomach acid when dissolved in water. It is classified as a General Sale List (GSL) medicine in the UK, meaning you can buy it without a prescription from pharmacies, supermarkets, and online retailers like Cured Pharmacy.

Indigestion (also called dyspepsia) is a common condition that causes discomfort or pain in the upper abdomen, often after eating. Heartburn — that burning sensation rising from the stomach into the chest — is frequently associated with indigestion. Eno fruit salts are designed to provide short-term symptomatic relief for these occasional complaints.

 

What Do You Need to Know Before Using Eno Fruit Salts?

 

Before using Eno Fruit Salts, it's important to check whether this product is appropriate for you. Do not use this product if any of the following apply:

  • You are on a low-sodium (low-salt) diet — Eno contains a significant amount of sodium per dose
  • You have kidney disease or impaired kidney function
  • You have been diagnosed with hypercalcaemia (high calcium levels in the blood)
  • You are allergic to any of the ingredients listed on the label
  • You are under 12 years of age
  • You are pregnant or breastfeeding — consult your GP or pharmacist first

You should also be aware of potential interactions with other medicines. Antacids can affect the absorption of certain drugs if taken at the same time:

  • Some antibiotics (e.g. tetracyclines, fluoroquinolones) — leave at least 2 hours between doses
  • Iron supplements — antacids can reduce iron absorption
  • Some heart medicines and antifungals — timing of doses may need to be adjusted
  • Enteric-coated tablets — antacids may cause these to dissolve too early

If you are taking any prescription medicines, speak to your pharmacist before using Eno Fruit Salts. You might also find it helpful to browse our sickness and nausea range if your symptoms include nausea alongside indigestion.

 

How Should You Use Eno Fruit Salts?

 

Always use Eno Fruit Salts exactly as directed on the label. The steps below outline the correct method of preparation and administration:

  1. Measure one level 5ml teaspoon of Eno Fruit Salts powder
  2. Pour the powder into a glass containing approximately 200ml (a standard glass) of water
  3. Stir well until the powder is fully dissolved and the fizzing begins
  4. Drink the solution while it is still effervescent for best effect
  5. Do not take more than three doses in any 24-hour period
Indication Age Group Dose Frequency
Indigestion / Heartburn / Trapped Wind Adults and children 12+ 1 level teaspoon (5ml) in 200ml water Up to 3 times daily
Not recommended Under 12 years

 

What Are the Possible Side Effects of Eno Fruit Salts?

 

Eno Fruit Salts are generally well tolerated when used as directed. However, as with any medicine, side effects are possible. If you experience anything that concerns you, stop use and speak to your pharmacist or GP.

Common side effects:

  • Belching or burping — caused by the release of carbon dioxide gas
  • Flatulence (wind)
  • Mild bloating immediately after taking the dose

Less common side effects (particularly with prolonged or excessive use):

  • Increased thirst due to sodium content
  • Fluid retention or swelling in people sensitive to sodium
  • Alkalosis (an imbalance in the body's acid-base levels) — rare, associated with overuse
  • Rebound acid production if used very frequently over a long period

If you notice any unusual symptoms, particularly swelling, difficulty breathing, or a rash, seek medical attention promptly as these could indicate an allergic reaction.

 

How Should You Store Eno Fruit Salts?

 

  • Store below 25°C in a cool, dry place
  • Keep away from direct sunlight and sources of moisture
  • Always replace the lid firmly after each use
  • Do not store in the bathroom — humidity can cause the powder to clump
  • Keep out of the reach and sight of children
  • Do not use after the expiry date printed on the base of the tub
  • Do not dispose of medicines via wastewater or household waste — return unused product to your pharmacist

For other digestive health products that complement your routine, take a look at our constipation range, which includes a variety of options for broader gut health support.

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 Eno Fruit Salts online in the UK?

You can buy Eno Fruit Salts Original 150g online from Cured Pharmacy for just £2.98, with fast UK delivery straight to your door. It's a General Sale List medicine, so no prescription is needed. Simply add it to your basket and check out in minutes.

How do Eno Fruit Salts work in the body?

Eno Fruit Salts work through an effervescent chemical reaction between citric acid, sodium bicarbonate, and sodium carbonate when dissolved in water. This reaction neutralises excess stomach acid, raising the pH of the stomach contents and relieving the burning discomfort of heartburn and indigestion. The fizzing action may also help to release trapped wind.

How do I use Eno Fruit Salts step by step?

Using Eno Fruit Salts is straightforward. Follow these steps:

  1. Measure one level 5ml teaspoon of powder
  2. Add to a glass of approximately 200ml of water
  3. Stir until dissolved and drink while still fizzing

Take after meals or when symptoms occur, up to three times in 24 hours.

What is the correct dose of Eno Fruit Salts for adults?

The recommended adult dose is one level teaspoon (5ml) dissolved in a glass of water (around 200ml). You can take this up to three times in a 24-hour period, but you should not exceed this. If you find you need it more frequently than this on a regular basis, speak to your GP.

Can children use Eno Fruit Salts?

Eno Fruit Salts are suitable for young people aged 12 and over at the standard adult dose. They are not recommended for children under 12 years of age. If your child under 12 is experiencing indigestion or stomach discomfort, speak to your GP or pharmacist for age-appropriate advice.

Are there any side effects of taking Eno Fruit Salts?

Most people tolerate Eno Fruit Salts well. The most common side effect is belching or burping, which happens because the effervescent reaction releases carbon dioxide gas. Some people may also notice mild flatulence. Prolonged or excessive use can, in rare cases, lead to an imbalance in the body's acid-base levels, so stick to the recommended dose.

Can I take Eno Fruit Salts during pregnancy?

Pregnant women should consult their GP or midwife before using Eno Fruit Salts, as the product contains a notable amount of sodium per dose, which may not be suitable during pregnancy — particularly if you have been advised to watch your salt intake. Your healthcare provider can recommend the safest antacid option for you during pregnancy.

Is Eno Fruit Salts suitable for people on a low-sodium diet?

No — Eno Fruit Salts contain sodium bicarbonate and sodium carbonate, which means each dose contributes a significant amount of sodium. If you have been advised to follow a low-sodium diet — for example, due to high blood pressure or heart disease — you should speak to your pharmacist before using this product. There may be a more suitable antacid option for you.

What are the best alternatives to Eno Fruit Salts?

There are several antacid alternatives available depending on your symptoms. Gaviscon works by forming a protective raft over stomach contents, which can be particularly helpful for acid reflux. Rennie tablets contain calcium carbonate and magnesium carbonate and are convenient for on-the-go use. You can explore a range of options in our indigestion collection to find what suits you best.

Can Eno Fruit Salts interact with other medicines?

Yes, antacids including Eno Fruit Salts can affect the absorption of certain medicines if taken at the same time. These include some antibiotics (such as tetracyclines), iron supplements, and some antifungal medicines. As a general rule, leave at least two hours between taking Eno and any other medication. Always check with your pharmacist if you are unsure.

How quickly do Eno Fruit Salts start to work?

Eno Fruit Salts typically begin to work within a few minutes of drinking the dissolved solution, as the antacid ingredients start neutralising stomach acid almost immediately. The effervescent action means the active ingredients are rapidly available for absorption. This makes it a useful option when you need relief relatively quickly after a meal.

How long can you use Eno Fruit Salts for?

Eno Fruit Salts are intended for short-term, occasional use only. If your symptoms of indigestion or heartburn persist for more than two weeks, or if they are severe or worsening, you should see your GP rather than continuing to self-treat. Persistent symptoms can sometimes indicate an underlying condition that needs proper investigation.

What happens if I accidentally take too much Eno Fruit Salts?

Taking more than the recommended dose of Eno Fruit Salts can lead to excessive sodium intake and, in rare cases, a condition called metabolic alkalosis — where the body's acid-base balance is disrupted. If you think you or someone else has taken too much, contact NHS 111 or your nearest A&E department for advice. Always keep medicines out of reach of children.

What are the latest findings on antacid use for indigestion?

Current NHS guidance confirms that antacids remain a first-line option for the short-term relief of mild to moderate indigestion and heartburn symptoms. For frequent or severe symptoms, proton pump inhibitors (PPIs) or H2 blockers may be more appropriate and should be discussed with a GP. Lifestyle changes — such as eating smaller meals, avoiding trigger foods, and not lying down after eating — are also recommended alongside any medication. You can find further digestive health support in our IBS and cramps collection.

Does Eno Fruit Salts help with trapped wind specifically?

Yes — the effervescent fizzing action of Eno Fruit Salts can help to release trapped wind by encouraging belching, which provides relief from the bloating and discomfort associated with gas build-up in the stomach. It is one of the reasons many people reach for Eno specifically after a gassy or heavy meal. If trapped wind is a frequent problem for you, it may be worth discussing this with your GP or pharmacist.

How Should You Use Eno Fruit Salts Original?

Eno Fruit Salts Original is simple to prepare and take. Always read the label before use and follow the instructions carefully to get the most from this product. Never take the powder dry — it must always be dissolved in water first.

What Is the Correct Dose of Eno Fruit Salts Original?

The dose varies by age group. Do not exceed the maximum daily dose under any circumstances. If you are unsure whether this product is right for you, speak to your pharmacist before use.

When Is the Best Time to Use Eno Fruit Salts Original?

Eno Fruit Salts work best when taken as soon as symptoms begin — typically after eating a large, rich, or spicy meal. Taking it promptly means the antacid ingredients can get to work neutralising stomach acid before discomfort becomes more intense. Some people find it helpful to take a dose after their evening meal if they know they are prone to nighttime heartburn, though you should always remain upright for at least 30 minutes after taking it.

Avoid taking Eno Fruit Salts at exactly the same time as other medicines. Leave a gap of at least two hours between this product and any other medication to avoid affecting absorption.

How Long Can You Use Eno Fruit Salts Original For?

Eno Fruit Salts are designed for short-term, occasional use to manage mild and infrequent digestive symptoms. If you find yourself reaching for it every day, or if your symptoms have not improved after two weeks of use, this is a sign that you should speak to your GP. Persistent indigestion or heartburn can sometimes indicate an underlying condition — such as gastro-oesophageal reflux disease (GORD) or a peptic ulcer — that requires proper diagnosis and treatment.

Long-term or excessive use of antacids containing sodium bicarbonate is not recommended, as it can disrupt the body's natural acid-base balance and contribute to excess sodium intake.

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 Eno Fruit Salts?

Most people who use Eno Fruit Salts at the recommended dose experience few or no side effects. The most frequently reported effects are directly related to the effervescent nature of the product — specifically, the release of carbon dioxide gas during the chemical reaction.

  • Belching or burping — very common and usually harmless
  • Flatulence (wind) — may occur as gas moves through the digestive tract
  • Mild bloating immediately after taking the dose

What Are the Less Common Side Effects of Eno Fruit Salts?

Less common side effects are more likely to occur if you use Eno Fruit Salts more frequently than recommended, or over a prolonged period. These are not typical with occasional, short-term use at the correct dose.

  • Increased thirst — related to the sodium content of the product
  • Mild fluid retention or ankle swelling in people who are sensitive to sodium
  • Nausea in some individuals, particularly if taken on an empty stomach
  • Rebound acid production — the stomach may temporarily produce more acid after the antacid effect wears off with frequent use

What Are the Serious Side Effects of Eno Fruit Salts?

Serious side effects from Eno Fruit Salts are rare when the product is used as directed. However, excessive or prolonged use can lead to metabolic alkalosis — a condition where the blood becomes too alkaline due to an excess of bicarbonate. Symptoms of this can include muscle twitching, hand tremors, nausea, vomiting, and confusion. This is uncommon with normal use but worth being aware of.

Seek immediate medical attention if you experience any signs of an allergic reaction, such as a skin rash, swelling of the face or throat, or difficulty breathing after taking this product.

What Should You Do If You Experience Side Effects of Eno Fruit Salts?

If you experience mild side effects such as belching or wind, these are expected and should resolve on their own. You do not need to stop taking the product unless they are particularly bothersome. If you experience any unusual or severe symptoms, stop using Eno Fruit Salts and contact your pharmacist or GP for advice. In the case of a suspected allergic reaction or overdose, call 999 or go to your nearest A&E immediately.

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

Can Eno Fruit Salts Interact With Other Medicines?

Yes. As an antacid, Eno Fruit Salts can affect how other medicines are absorbed by the body if taken at the same time. This is particularly relevant for the following:

  • Tetracycline and fluoroquinolone antibiotics — antacids can significantly reduce their absorption; leave at least 2 hours between doses
  • Iron supplements — antacids can reduce iron absorption from the gut
  • Antifungal medicines such as itraconazole — absorption may be impaired
  • Enteric-coated tablets — antacids may cause the coating to dissolve prematurely
  • Some heart medicines and thyroid medications — timing of doses may need adjustment

Always tell your pharmacist about all medicines you are currently taking — including over-the-counter products and supplements — before starting Eno Fruit Salts.

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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