Gaviscon

What is Gaviscon?

Gaviscon is a reflux suppressant that contains sodium alginate along with other agents to help with the symptoms of heartburn and indigestion. It is available both on prescription and to buy in pharmacies or shops. Gaviscon comes in various forms including liquids, chewable tablets, and infant powder sachets. It is used to treat acid reflux and heartburn by forming a protective barrier in the stomach[1].

What is Gaviscon used for?

Gaviscon is used for conditions caused by excess stomach acid and reflux, including[1]:

• Gastro-oesophageal reflux disease (GORD) 

• Heartburn 

• Acid regurgitation 

• Indigestion 

• Reflux in infants (Gaviscon Infant) 

How does Gaviscon work?

Gaviscon contains alginates, which react with stomach acid to form a gel-like raft that floats on top of the stomach contents. This[1]: 

• Prevents acid from rising into the oesophagus 

• Protects the lining of the food pipe 

• Reduces burning and discomfort 

Some formulations also include antacids such as calcium carbonate or sodium bicarbonate to neutralise excess acid[1]. 

Who can take Gaviscon?

Gaviscon is suitable for[1]: 

• Adults and children over 12 

• Children under 12 on prescription 

• Pregnant and breastfeeding individuals 

It may not be suitable for people who[1]: 

• Are allergic to alginates or other ingredients in Gaviscon 

• Have a rare, inherited illness called phenylketonuria 

• Have low levels of phosphate in your blood 

• Have kidney, liver, or heart disease or bowel obstruction 

• Are on a low-sodium or low-calcium diet 

Please tell your doctor or pharmacist about any conditions you may have or medication you take before you start treatment, and always follow the instructions in the Patient Information Leaflet[2].

What is the typical dosage of Gaviscon?

Doses vary by age and product type and requirement, but the standard dose for people over 12 years is[1]: 

• Gaviscon Original:10ml to 20ml after meals and at bedtime, but no more than 4 times a day 

• Gaviscon Advance: 5ml to 10ml after meals and at bedtime, up to four times each day

• Gaviscon chewable tablets: One to two tablets after meals and at bedtime

Do not exceed 4 doses a day for adults or 6 doses a day for infants. 

How do you take Gaviscon?

Instructions depend on the formulation[1]:

• Liquid: Shake well, measure the dose using the spoon provided, and take after meals and at bedtime. Do not refrigerate 

• Tablets: Chew thoroughly before swallowing 

• Infant sachets: Mix with cooled boiled water or milk and give using a spoon or bottle. Speak to your doctor, pharmacist or consult product literature thoroughly for instructions. Dose should be made up immediately before use. If breastfeeding, pause feeding and administer the dose before continuing with feed. For other infants, give dose after feed 

Can you stop taking Gaviscon?

Yes. Gaviscon is used as needed and can be stopped once symptoms resolve. If symptoms persist beyond 7 days, speak to your doctor[1]. 

What do you do if you take too much Gaviscon?

Taking too much Gaviscon may lead to bloating, constipation and intestinal obstruction (rare). Seek medical advice if symptoms occur[1].

What do you do if you forget to take Gaviscon?

Take a dose when you remember, ideally after meals. Do not double up on doses[1].

How do you store Gaviscon?

To ensure Gaviscon stays effective[1]:

• Store below 30°C but do not refrigerate 

• Keep in the original packaging 

• Keep out of reach of children 

• Do not use after the expiry date 

• Do not use damaged bottles or sachets   

What medicines can’t you take with Gaviscon?

Gaviscon may affect absorption of some other medicines, meaning your medication may not work as well as expected. Avoid taking it within 2 hours of[1]: 

• Some antibiotics (e.g. tetracyclines, quinolones) 

• Iron supplements 

• Thyroid hormones 

• Antifungals (e.g. ketoconazole) 

• Heart medicines (e.g. digoxin) 

• Neuroleptics 

• Bisphosphonates (e.g. alendronic acid) 

• Levothyroxine 

• Antihistamines 

• Estramustine for prostate cancer 

• Steroids 

• Antipsychotics 

• Chloroquine for malaria 

• Penicillamine for arthritis 

Always inform your doctor or pharmacist about all medications and supplements you take before you start a new medicine, and follow the instructions in the Patient Information Leaflet[2]. 

What are the side effects of Gaviscon?

Gaviscon is generally well tolerated, but some people may experience common side effects like[1]: 

• Mild bloating 

• Constipation or diarrhoea 

Rare side effects include[1]: 

• Vomiting 

• Constipation 

• Diarrhoea 

You should contact your GP if you experience any of these symptoms. In very rare cases, the medicine may cause a serious allergic reaction (anaphylaxis). You should call 999 or visit A&E immediately if you believe this is happening[1]. 

Symptoms of anaphylaxis include[1]:  

• Difficulty breathing  

• Tightness in throat and chest  

• Swelling of the tongue or throat  

• Feeling faint or dizzy  

• Blue/grey skin or lips  

• Loss of consciousness 

If you experience any side effects, including those not listed, you are encouraged to report them via the Yellow Card Scheme or contact your doctor, pharmacist, or nurse. This information is intended as a summary for general awareness and does not replace professional medical advice. 

The information provided in the side effects section is not a comprehensive list of all possible side effects associated with this medication. For a complete list of side effects, please refer to the Patient Information Leaflet (PIL) provided with your medication or consult your healthcare professional[2].

Frequently asked questions about Gaviscon

Can I take Gaviscon during pregnancy? 
Yes, it’s considered safe[1]. 

Can I take Gaviscon with other reflux medicines? 
Yes, but separate doses by at least two hours[1]. 

Can children take it?  
Yes, Gaviscon Infant is suitable under medical advice[1]. 

Can I take Gaviscon long-term?  
Only if your doctor advises it[1]. 

Does it interact with food?  
No, but it should be taken after meals when indigestion is expected or experienced[1]. 

Can I drink alcohol with Gaviscon? 
Yes, though alcohol may worsen reflux[1]. 

Can I drive after taking Gaviscon? 
Yes, it does not impair driving[1]. 

Can give Gaviscon with milk? 
Yes, especially in infant preparations. Speak to the prescriber, your pharmacist or consult the product literature for more information[1]. 

Does Gaviscon contain sugar? 
Most versions are sugar-free. Consult product literature or ask your pharmacist if you’re unsure[1]. 

For the official NHS guide to Gaviscon, visit their website.