The Story
What Are Gaviscon Double Action Liquid Sachets?
If you've ever felt that burning sensation creeping up your chest after a meal, you'll know just how uncomfortable heartburn can be. Gaviscon Double Action Liquid Sachets are a well-established, over-the-counter remedy designed to tackle both heartburn and indigestion at the same time — which is exactly what makes them so useful. Each sachet contains a ready-to-use liquid suspension that you can take directly after meals or at bedtime, without needing water. You can browse our full range of indigestion treatments if you'd like to compare your options.
Heartburn is extremely common in the UK. It occurs when stomach acid flows back up into the oesophagus, causing that familiar burning discomfort. Gaviscon Double Action Liquid Sachets are licensed for use in adults and children aged 12 and over, and they're available without a prescription.
How Do Gaviscon Double Action Liquid Sachets Work?
The "double action" in the name isn't just marketing — it genuinely describes two distinct mechanisms happening at once. Here's how the product works step by step:
- Raft formation: Sodium alginate reacts with stomach acid to form a thick, viscous gel that floats on top of the stomach contents, acting as a physical barrier against acid reflux.
- Acid neutralisation: Sodium bicarbonate and calcium carbonate work together to neutralise excess stomach acid, reducing the burning sensation directly.
- Symptom relief: The combined effect means you get both mechanical protection and chemical neutralisation — addressing the root cause of discomfort rather than just masking it.
- Onset of action: Relief typically begins within a few minutes of taking the dose, making it suitable for on-the-spot use after meals.
This dual approach sets it apart from simple antacids, which only neutralise acid without forming a protective raft.
Who Should Use Gaviscon Double Action Liquid Sachets?
These sachets are suitable for a wide range of people dealing with common upper gastrointestinal symptoms. They're particularly convenient for those who want a portable, pre-measured dose they can carry in a bag or pocket. That said, they're not appropriate for everyone — always read the label carefully.
- Adults and children aged 12 years and over experiencing heartburn or acid reflux
- People with indigestion after eating, particularly after large or rich meals
- Pregnant women suffering from heartburn (after seeking advice from a midwife or GP)
- Those who prefer a liquid formulation over tablets
How Do Gaviscon Double Action Liquid Sachets Compare to Gaviscon Advance?
| Feature | Gaviscon Double Action Liquid Sachets | Gaviscon Advance Liquid |
|---|---|---|
| Active ingredients | Sodium alginate, sodium bicarbonate, calcium carbonate | Sodium alginate, potassium bicarbonate |
| Mechanism | Raft formation + acid neutralisation | Raft formation only |
| Suitable for pregnancy | Seek advice first | Often preferred in pregnancy (lower sodium) |
| Format | Individual liquid sachets | Bottle (liquid) |
Is This Product Suitable for People With Dietary Restrictions?
Gaviscon Double Action Liquid Sachets contain sodium, so if you're on a low-sodium diet — for example, due to high blood pressure or kidney disease — you should speak to your GP or pharmacist before use. Each sachet contains a measurable amount of sodium, and regular use could contribute to your daily intake. It's also worth noting that Gaviscon Double Action Liquid Sachets are not suitable for children under 12 years of age unless directed by a doctor. If you're managing other digestive conditions alongside heartburn, our IBS and cramps collection may also be of interest.
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.
Gaviscon Double Action Liquid Sachets specifications
| Treatment category | Heartburn & Indigestion |
| Mechanism of action | Alginate raft formation and antacid neutralisation |
| Effective for | Heartburn, acid reflux, indigestion |
| Suitable for | Adults and children aged 12 and over |
| Active ingredients | Sodium alginate, sodium bicarbonate, calcium carbonate |
| Pack sizes | 12 sachets |
| UK classification | General Sale List (GSL) |
| Drug class | Alginate antacid |
| Preparation | Oral liquid suspension (sachet) |
| Route of administration | Oral |
Specifications of Gaviscon Double Action Liquid Sachets
What Are Gaviscon Double Action Liquid Sachets and What Are They Used For?
Gaviscon Double Action Liquid Sachets are an over-the-counter medicine used to relieve the symptoms of heartburn, acid reflux, and indigestion. They contain three active ingredients — sodium alginate, sodium bicarbonate, and calcium carbonate — which work together to neutralise stomach acid and form a protective barrier in the stomach. The NHS recognises heartburn as a very common condition, often triggered by eating certain foods, lying down after meals, or being overweight.
These sachets are licensed for use in adults and children aged 12 and over. They are not a treatment for the underlying cause of acid reflux, such as gastro-oesophageal reflux disease (GORD), but they provide effective short-term symptom relief.
What Do You Need to Know Before Using Gaviscon Double Action Liquid Sachets?
Before taking these sachets, it's important to check whether they are appropriate for you. Do not use this product if any of the following apply:
- You are allergic to sodium alginate, sodium bicarbonate, calcium carbonate, or any other ingredient in the product
- You are under 12 years of age (unless directed by a doctor)
- You have been told to follow a low-sodium or low-calcium diet
- You have severe kidney disease
- You have hypercalcaemia (high calcium levels in the blood)
- You have nephrolithiasis (kidney stones containing calcium)
Speak to your GP or pharmacist before use if you are pregnant, breastfeeding, or have any other medical condition. The following medicines may interact with Gaviscon Double Action Liquid Sachets:
- Tetracycline antibiotics (e.g. doxycycline) — absorption may be reduced
- Thyroid medications (e.g. levothyroxine) — leave a 2-hour gap
- Iron supplements — absorption may be affected
- Some antifungals (e.g. ketoconazole) — take at least 2 hours apart
How Should You Use Gaviscon Double Action Liquid Sachets?
Always use this medicine exactly as described in the patient information leaflet or as directed by your pharmacist. Here's a step-by-step guide:
- Tear open the sachet along the notch at the top
- Swallow the contents directly from the sachet, or mix with a small amount of water if preferred
- Take after meals and at bedtime
- Do not take more than 4 doses (sachets) in any 24-hour period
- If symptoms persist beyond 7 days, consult your GP
| Indication | Age Group | Dose | Frequency |
|---|---|---|---|
| Heartburn / indigestion | Adults & children 12+ | 2–4 sachets (10–20 ml) | After meals and at bedtime, up to 4 times daily |
| Heartburn in pregnancy | Adults (seek advice first) | 2–4 sachets | After meals and at bedtime, as directed by GP |
| Children under 12 | Under 12 years | Not recommended without medical supervision | |
What Are the Possible Side Effects of Gaviscon Double Action Liquid Sachets?
Like all medicines, Gaviscon Double Action Liquid Sachets can cause side effects, although not everyone experiences them. Most people tolerate this product well when used as directed.
Common side effects (may affect up to 1 in 10 people):
- Nausea
- Vomiting
- Constipation
- Flatulence (wind)
Less common side effects (may affect up to 1 in 100 people):
- Allergic reactions such as skin rash, itching, or urticaria
- Swelling of the face, lips, tongue, or throat (angioedema) — seek immediate medical attention if this occurs
- Raised blood calcium levels with prolonged high-dose use
If you experience any serious or unexpected side effects, stop taking the product and contact your GP or pharmacist. You can also report side effects directly to the MHRA via the Yellow Card scheme. If you're managing other digestive symptoms alongside heartburn, you might find our sickness and nausea range helpful.
How Should You Store Gaviscon Double Action Liquid Sachets?
Correct storage helps maintain the product's effectiveness and safety. Follow these guidelines:
- Store below 30°C in a dry place
- Do not freeze
- Keep out of the sight and reach of children
- Do not use after the expiry date printed on the sachet or outer carton
- Once opened, use the sachet immediately — do not store a partially used sachet
- Dispose of unused medicines responsibly — return to your local pharmacy for safe disposal
For general digestive wellness, it's also worth considering whether your diet and lifestyle may be contributing to symptoms. The NHS provides detailed guidance on managing heartburn through lifestyle changes, which can complement the use of medicines like these sachets. You may also want to explore our vitamins and supplements range to support your overall digestive health.
References
- https://www.nhs.uk/conditions/heartburn-and-acid-reflux/
- https://www.nhs.uk/conditions/indigestion/
- https://www.nhs.uk/conditions/gastro-oesophageal-reflux-disease-gord/
- https://www.nhs.uk/medicines/antacids/
- https://www.medicines.org.uk/emc/product/1215/smpc
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 Gaviscon Double Action Liquid Sachets online in the UK?
You can buy Gaviscon Double Action Liquid Sachets online from Cured Pharmacy, a GPhC-registered UK online pharmacy. They are available without a prescription as a General Sale List (GSL) medicine. Simply add them to your basket and choose your preferred delivery option for fast, discreet dispatch.
How do Gaviscon Double Action Liquid Sachets work in the body?
The sachets work through two simultaneous mechanisms. Sodium alginate reacts with stomach acid to form a thick gel raft that floats on top of stomach contents, physically preventing acid from refluxing into the oesophagus. At the same time, sodium bicarbonate and calcium carbonate neutralise excess stomach acid, reducing the burning sensation associated with heartburn and indigestion.
How do I use Gaviscon Double Action Liquid Sachets step by step?
Using the sachets is straightforward. Follow these steps:
- Tear open the sachet at the notch
- Swallow the liquid contents directly, or mix with a little water
- Take after meals and at bedtime
- Do not exceed 4 sachets in 24 hours
No preparation is needed — the sachets are ready to use straight from the pack, making them ideal for use on the go.
What is the correct dose of Gaviscon Double Action Liquid Sachets for adults?
Adults and children aged 12 and over should take 2 to 4 sachets (equivalent to 10–20 ml) up to four times daily. Doses should be taken after meals and at bedtime. Do not exceed 4 doses in any 24-hour period unless directed by a doctor.
Can I take Gaviscon Double Action Liquid Sachets during pregnancy?
Gaviscon products are commonly used during pregnancy for heartburn relief, and the NHS acknowledges antacids as a first-line option for pregnant women. However, because these sachets contain sodium, your midwife or GP may recommend Gaviscon Advance instead, which has a lower sodium content. Always seek professional advice before taking any medicine during pregnancy.
What are the side effects of Gaviscon Double Action Liquid Sachets?
Most people tolerate Gaviscon Double Action Liquid Sachets well. Possible side effects include nausea, vomiting, constipation, and flatulence. Rarely, allergic reactions such as skin rash or swelling of the face and throat may occur — if this happens, stop use immediately and seek urgent medical attention.
Can Gaviscon Double Action Liquid Sachets interact with other medicines?
Yes, Gaviscon can affect the absorption of certain medicines, including tetracycline antibiotics, levothyroxine, iron supplements, and some antifungals. To avoid this, leave at least a 2-hour gap between taking Gaviscon and any other medicines. If you're unsure, speak to your pharmacist before use.
How long can you use Gaviscon Double Action Liquid Sachets for?
These sachets are intended for short-term use only. If your symptoms persist for more than 7 days, worsen, or are accompanied by difficulty swallowing, unexplained weight loss, or vomiting blood, you should stop use and consult your GP promptly. Persistent heartburn may indicate an underlying condition such as GORD that requires further investigation.
Are Gaviscon Double Action Liquid Sachets suitable for children?
Gaviscon Double Action Liquid Sachets are not recommended for children under 12 years of age unless specifically directed by a doctor. For younger children with reflux symptoms, a GP should be consulted to identify the most appropriate treatment. Parents looking for children's digestive or general health products can explore our baby and toddler range for age-appropriate options.
What is the difference between Gaviscon Double Action and Gaviscon Advance?
Gaviscon Double Action contains sodium alginate, sodium bicarbonate, and calcium carbonate — providing both raft formation and acid neutralisation. Gaviscon Advance contains sodium alginate and potassium bicarbonate, forming a raft but with less acid-neutralising action and a lower sodium content. Gaviscon Advance is often preferred during pregnancy or for those on a low-sodium diet.
What are the alternatives to Gaviscon Double Action Liquid Sachets?
Alternatives include other alginate-based products such as Gaviscon Advance, as well as simple antacids like Rennie or Tums. For more persistent symptoms, a GP may recommend a proton pump inhibitor (PPI) such as omeprazole. You can browse our full indigestion treatments collection to compare available options.
What happens if I miss a dose of Gaviscon Double Action Liquid Sachets?
Gaviscon Double Action Liquid Sachets are taken as needed for symptom relief rather than on a strict dosing schedule, so missing a dose is not a concern in the same way as with regular prescription medicines. Simply take a sachet when symptoms occur, after meals or at bedtime. Never double up doses to compensate for a missed one.
Can I take Gaviscon Double Action Liquid Sachets on an empty stomach?
Gaviscon Double Action Liquid Sachets are most effective when taken after meals and at bedtime, as this is when the alginate raft can form most effectively on top of stomach contents. Taking them on an empty stomach is less likely to provide optimal relief, as there is less gastric content for the raft to sit on. For best results, always take after eating.
Is there any latest research on alginate-based heartburn treatments like Gaviscon?
Alginate-based therapies have been studied extensively and are well-supported by clinical evidence as an effective first-line treatment for mild to moderate heartburn and acid reflux. Research published in peer-reviewed journals has confirmed that alginate rafts can significantly reduce oesophageal acid exposure compared to placebo. The NHS and NICE both recognise alginates as appropriate options for managing heartburn symptoms.
Can I take Gaviscon Double Action Liquid Sachets with other heartburn medicines?
You should not routinely combine Gaviscon with other antacids without speaking to a pharmacist first, as this could lead to excessive intake of certain minerals such as calcium or sodium. If you are already taking a PPI (e.g. omeprazole) prescribed by your GP, Gaviscon can sometimes be used alongside it for breakthrough symptoms — but always confirm this with your pharmacist or doctor before doing so.
Description
What Are Gaviscon Double Action Liquid Sachets?
If you've ever felt that burning sensation creeping up your chest after a meal, you'll know just how uncomfortable heartburn can be. Gaviscon Double Action Liquid Sachets are a well-established, over-the-counter remedy designed to tackle both heartburn and indigestion at the same time — which is exactly what makes them so useful. Each sachet contains a ready-to-use liquid suspension that you can take directly after meals or at bedtime, without needing water. You can browse our full range of indigestion treatments if you'd like to compare your options.
Heartburn is extremely common in the UK. It occurs when stomach acid flows back up into the oesophagus, causing that familiar burning discomfort. Gaviscon Double Action Liquid Sachets are licensed for use in adults and children aged 12 and over, and they're available without a prescription.
How Do Gaviscon Double Action Liquid Sachets Work?
The "double action" in the name isn't just marketing — it genuinely describes two distinct mechanisms happening at once. Here's how the product works step by step:
- Raft formation: Sodium alginate reacts with stomach acid to form a thick, viscous gel that floats on top of the stomach contents, acting as a physical barrier against acid reflux.
- Acid neutralisation: Sodium bicarbonate and calcium carbonate work together to neutralise excess stomach acid, reducing the burning sensation directly.
- Symptom relief: The combined effect means you get both mechanical protection and chemical neutralisation — addressing the root cause of discomfort rather than just masking it.
- Onset of action: Relief typically begins within a few minutes of taking the dose, making it suitable for on-the-spot use after meals.
This dual approach sets it apart from simple antacids, which only neutralise acid without forming a protective raft.
Who Should Use Gaviscon Double Action Liquid Sachets?
These sachets are suitable for a wide range of people dealing with common upper gastrointestinal symptoms. They're particularly convenient for those who want a portable, pre-measured dose they can carry in a bag or pocket. That said, they're not appropriate for everyone — always read the label carefully.
- Adults and children aged 12 years and over experiencing heartburn or acid reflux
- People with indigestion after eating, particularly after large or rich meals
- Pregnant women suffering from heartburn (after seeking advice from a midwife or GP)
- Those who prefer a liquid formulation over tablets
How Do Gaviscon Double Action Liquid Sachets Compare to Gaviscon Advance?
| Feature | Gaviscon Double Action Liquid Sachets | Gaviscon Advance Liquid |
|---|---|---|
| Active ingredients | Sodium alginate, sodium bicarbonate, calcium carbonate | Sodium alginate, potassium bicarbonate |
| Mechanism | Raft formation + acid neutralisation | Raft formation only |
| Suitable for pregnancy | Seek advice first | Often preferred in pregnancy (lower sodium) |
| Format | Individual liquid sachets | Bottle (liquid) |
Is This Product Suitable for People With Dietary Restrictions?
Gaviscon Double Action Liquid Sachets contain sodium, so if you're on a low-sodium diet — for example, due to high blood pressure or kidney disease — you should speak to your GP or pharmacist before use. Each sachet contains a measurable amount of sodium, and regular use could contribute to your daily intake. It's also worth noting that Gaviscon Double Action Liquid Sachets are not suitable for children under 12 years of age unless directed by a doctor. If you're managing other digestive conditions alongside heartburn, our IBS and cramps collection may also be of interest.
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.
Gaviscon Double Action Liquid Sachets specifications
| Treatment category | Heartburn & Indigestion |
| Mechanism of action | Alginate raft formation and antacid neutralisation |
| Effective for | Heartburn, acid reflux, indigestion |
| Suitable for | Adults and children aged 12 and over |
| Active ingredients | Sodium alginate, sodium bicarbonate, calcium carbonate |
| Pack sizes | 12 sachets |
| UK classification | General Sale List (GSL) |
| Drug class | Alginate antacid |
| Preparation | Oral liquid suspension (sachet) |
| Route of administration | Oral |
Specifications of Gaviscon Double Action Liquid Sachets
What Are Gaviscon Double Action Liquid Sachets and What Are They Used For?
Gaviscon Double Action Liquid Sachets are an over-the-counter medicine used to relieve the symptoms of heartburn, acid reflux, and indigestion. They contain three active ingredients — sodium alginate, sodium bicarbonate, and calcium carbonate — which work together to neutralise stomach acid and form a protective barrier in the stomach. The NHS recognises heartburn as a very common condition, often triggered by eating certain foods, lying down after meals, or being overweight.
These sachets are licensed for use in adults and children aged 12 and over. They are not a treatment for the underlying cause of acid reflux, such as gastro-oesophageal reflux disease (GORD), but they provide effective short-term symptom relief.
What Do You Need to Know Before Using Gaviscon Double Action Liquid Sachets?
Before taking these sachets, it's important to check whether they are appropriate for you. Do not use this product if any of the following apply:
- You are allergic to sodium alginate, sodium bicarbonate, calcium carbonate, or any other ingredient in the product
- You are under 12 years of age (unless directed by a doctor)
- You have been told to follow a low-sodium or low-calcium diet
- You have severe kidney disease
- You have hypercalcaemia (high calcium levels in the blood)
- You have nephrolithiasis (kidney stones containing calcium)
Speak to your GP or pharmacist before use if you are pregnant, breastfeeding, or have any other medical condition. The following medicines may interact with Gaviscon Double Action Liquid Sachets:
- Tetracycline antibiotics (e.g. doxycycline) — absorption may be reduced
- Thyroid medications (e.g. levothyroxine) — leave a 2-hour gap
- Iron supplements — absorption may be affected
- Some antifungals (e.g. ketoconazole) — take at least 2 hours apart
How Should You Use Gaviscon Double Action Liquid Sachets?
Always use this medicine exactly as described in the patient information leaflet or as directed by your pharmacist. Here's a step-by-step guide:
- Tear open the sachet along the notch at the top
- Swallow the contents directly from the sachet, or mix with a small amount of water if preferred
- Take after meals and at bedtime
- Do not take more than 4 doses (sachets) in any 24-hour period
- If symptoms persist beyond 7 days, consult your GP
| Indication | Age Group | Dose | Frequency |
|---|---|---|---|
| Heartburn / indigestion | Adults & children 12+ | 2–4 sachets (10–20 ml) | After meals and at bedtime, up to 4 times daily |
| Heartburn in pregnancy | Adults (seek advice first) | 2–4 sachets | After meals and at bedtime, as directed by GP |
| Children under 12 | Under 12 years | Not recommended without medical supervision | |
What Are the Possible Side Effects of Gaviscon Double Action Liquid Sachets?
Like all medicines, Gaviscon Double Action Liquid Sachets can cause side effects, although not everyone experiences them. Most people tolerate this product well when used as directed.
Common side effects (may affect up to 1 in 10 people):
- Nausea
- Vomiting
- Constipation
- Flatulence (wind)
Less common side effects (may affect up to 1 in 100 people):
- Allergic reactions such as skin rash, itching, or urticaria
- Swelling of the face, lips, tongue, or throat (angioedema) — seek immediate medical attention if this occurs
- Raised blood calcium levels with prolonged high-dose use
If you experience any serious or unexpected side effects, stop taking the product and contact your GP or pharmacist. You can also report side effects directly to the MHRA via the Yellow Card scheme. If you're managing other digestive symptoms alongside heartburn, you might find our sickness and nausea range helpful.
How Should You Store Gaviscon Double Action Liquid Sachets?
Correct storage helps maintain the product's effectiveness and safety. Follow these guidelines:
- Store below 30°C in a dry place
- Do not freeze
- Keep out of the sight and reach of children
- Do not use after the expiry date printed on the sachet or outer carton
- Once opened, use the sachet immediately — do not store a partially used sachet
- Dispose of unused medicines responsibly — return to your local pharmacy for safe disposal
For general digestive wellness, it's also worth considering whether your diet and lifestyle may be contributing to symptoms. The NHS provides detailed guidance on managing heartburn through lifestyle changes, which can complement the use of medicines like these sachets. You may also want to explore our vitamins and supplements range to support your overall digestive health.
References
- https://www.nhs.uk/conditions/heartburn-and-acid-reflux/
- https://www.nhs.uk/conditions/indigestion/
- https://www.nhs.uk/conditions/gastro-oesophageal-reflux-disease-gord/
- https://www.nhs.uk/medicines/antacids/
- https://www.medicines.org.uk/emc/product/1215/smpc
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 Gaviscon Double Action Liquid Sachets online in the UK?
You can buy Gaviscon Double Action Liquid Sachets online from Cured Pharmacy, a GPhC-registered UK online pharmacy. They are available without a prescription as a General Sale List (GSL) medicine. Simply add them to your basket and choose your preferred delivery option for fast, discreet dispatch.
How do Gaviscon Double Action Liquid Sachets work in the body?
The sachets work through two simultaneous mechanisms. Sodium alginate reacts with stomach acid to form a thick gel raft that floats on top of stomach contents, physically preventing acid from refluxing into the oesophagus. At the same time, sodium bicarbonate and calcium carbonate neutralise excess stomach acid, reducing the burning sensation associated with heartburn and indigestion.
How do I use Gaviscon Double Action Liquid Sachets step by step?
Using the sachets is straightforward. Follow these steps:
- Tear open the sachet at the notch
- Swallow the liquid contents directly, or mix with a little water
- Take after meals and at bedtime
- Do not exceed 4 sachets in 24 hours
No preparation is needed — the sachets are ready to use straight from the pack, making them ideal for use on the go.
What is the correct dose of Gaviscon Double Action Liquid Sachets for adults?
Adults and children aged 12 and over should take 2 to 4 sachets (equivalent to 10–20 ml) up to four times daily. Doses should be taken after meals and at bedtime. Do not exceed 4 doses in any 24-hour period unless directed by a doctor.
Can I take Gaviscon Double Action Liquid Sachets during pregnancy?
Gaviscon products are commonly used during pregnancy for heartburn relief, and the NHS acknowledges antacids as a first-line option for pregnant women. However, because these sachets contain sodium, your midwife or GP may recommend Gaviscon Advance instead, which has a lower sodium content. Always seek professional advice before taking any medicine during pregnancy.
What are the side effects of Gaviscon Double Action Liquid Sachets?
Most people tolerate Gaviscon Double Action Liquid Sachets well. Possible side effects include nausea, vomiting, constipation, and flatulence. Rarely, allergic reactions such as skin rash or swelling of the face and throat may occur — if this happens, stop use immediately and seek urgent medical attention.
Can Gaviscon Double Action Liquid Sachets interact with other medicines?
Yes, Gaviscon can affect the absorption of certain medicines, including tetracycline antibiotics, levothyroxine, iron supplements, and some antifungals. To avoid this, leave at least a 2-hour gap between taking Gaviscon and any other medicines. If you're unsure, speak to your pharmacist before use.
How long can you use Gaviscon Double Action Liquid Sachets for?
These sachets are intended for short-term use only. If your symptoms persist for more than 7 days, worsen, or are accompanied by difficulty swallowing, unexplained weight loss, or vomiting blood, you should stop use and consult your GP promptly. Persistent heartburn may indicate an underlying condition such as GORD that requires further investigation.
Are Gaviscon Double Action Liquid Sachets suitable for children?
Gaviscon Double Action Liquid Sachets are not recommended for children under 12 years of age unless specifically directed by a doctor. For younger children with reflux symptoms, a GP should be consulted to identify the most appropriate treatment. Parents looking for children's digestive or general health products can explore our baby and toddler range for age-appropriate options.
What is the difference between Gaviscon Double Action and Gaviscon Advance?
Gaviscon Double Action contains sodium alginate, sodium bicarbonate, and calcium carbonate — providing both raft formation and acid neutralisation. Gaviscon Advance contains sodium alginate and potassium bicarbonate, forming a raft but with less acid-neutralising action and a lower sodium content. Gaviscon Advance is often preferred during pregnancy or for those on a low-sodium diet.
What are the alternatives to Gaviscon Double Action Liquid Sachets?
Alternatives include other alginate-based products such as Gaviscon Advance, as well as simple antacids like Rennie or Tums. For more persistent symptoms, a GP may recommend a proton pump inhibitor (PPI) such as omeprazole. You can browse our full indigestion treatments collection to compare available options.
What happens if I miss a dose of Gaviscon Double Action Liquid Sachets?
Gaviscon Double Action Liquid Sachets are taken as needed for symptom relief rather than on a strict dosing schedule, so missing a dose is not a concern in the same way as with regular prescription medicines. Simply take a sachet when symptoms occur, after meals or at bedtime. Never double up doses to compensate for a missed one.
Can I take Gaviscon Double Action Liquid Sachets on an empty stomach?
Gaviscon Double Action Liquid Sachets are most effective when taken after meals and at bedtime, as this is when the alginate raft can form most effectively on top of stomach contents. Taking them on an empty stomach is less likely to provide optimal relief, as there is less gastric content for the raft to sit on. For best results, always take after eating.
Is there any latest research on alginate-based heartburn treatments like Gaviscon?
Alginate-based therapies have been studied extensively and are well-supported by clinical evidence as an effective first-line treatment for mild to moderate heartburn and acid reflux. Research published in peer-reviewed journals has confirmed that alginate rafts can significantly reduce oesophageal acid exposure compared to placebo. The NHS and NICE both recognise alginates as appropriate options for managing heartburn symptoms.
Can I take Gaviscon Double Action Liquid Sachets with other heartburn medicines?
You should not routinely combine Gaviscon with other antacids without speaking to a pharmacist first, as this could lead to excessive intake of certain minerals such as calcium or sodium. If you are already taking a PPI (e.g. omeprazole) prescribed by your GP, Gaviscon can sometimes be used alongside it for breakthrough symptoms — but always confirm this with your pharmacist or doctor before doing so.
