Rennie Deflatine Sugar Free Mint – 36 Tablets

Based on 15 reviews
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RRP  £9.79
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36 Pack £8.99
Faye Bonnell - Medical Content Writer
Faye Bonnell
Medical Content Writer
James O'Loan - CEO & Superintendent Pharmacist
James O'Loan
CEO & Superintendent Pharmacist

What is Rennie Deflatine?

Rennie Deflatine is a treatment for trapped wind and acid reflux containing calcium carbonate, magnesium carbonate and simeticone. These mint flavour tablets quickly and effectively reduce the symptoms of trapped wind with no embarrassment. 

How do I take these tablets?

Adults and children over 12 should chew or suck on 1-2 tablets, as required, up to a maximum of 11 tablets in one day. Prolonged use of Rennie Deflatine should be avoided - if your trapped wind symptoms persist for longer than 14 days, you should consult a doctor. Avoid taking Rennie Deflatine with large amounts of milk or dairy products. 

How does the simeticone in Rennie Deflatine work to treat trapped wind?

Rennie Deflatine contains 25mg of simeticone, a type of medicine that is known as an antiflatulent. Simeticone works by bringing together small gas bubbles in your gut to form bigger bubbles, allowing trapped gas to travel through your body much more easily. It acts to gently disperse the trapped air bubbles, helping to relieve symptoms discreetly. 

How do these tablets help acid reflux?

As well as simeticone to treat trapped wind, Rennie Deflatine contains 680mg of calcium carbonate and 80mg of heavy magnesium carbonate to help relieve symptoms of acid reflux (also known as heartburn or indigestion). These active ingredients work by neutralising stomach acid and turning it into water. 

What is trapped wind? 

Trapped wind can occur when more gas is produced in your body than usual. This can happen when you swallow too much air, eat high fibre foods or drink fizzy drinks, amongst other possible causes. Symptoms of trapped wind can include: 

  • Bloating

  • Flatulence or burping

  • Feeling uncomfortably full after eating

  • Rumbling noises in your stomach

  • Stomach cramps

  • Nausea 

  • Pain when you bend over or lie down

  • Pain that travels around the body, behind your ribs, up your back or sometimes into your shoulder

Is Rennie Deflatine suitable for pregnant or breastfeeding women?

Pregnant and breastfeeding women are safe to take Rennie Deflatine, as long as they’re taken as instructed. If you need any further advice, feel free to contact a Chemist4U pharmacist. 

Can children take these tablets? 

No, Rennie Deflatine is not recommended for use in children under 12. If your child is suffering with trapped wind, contact your doctor or Chemist4U pharmacist for advice or browse our range of trapped wind treatments for suitable alternatives. 

When should Rennie Deflatine not be used? 

Rennie Deflatine tablets are usually suitable for most adults and children over 12. However, you must not take Rennie Deflatine if you: 

  • Have severe kidney disease

  • Have high calcium in the urine or kidney stones

  • Have high calcium or phosphate levels in the blood

  • Are allergic to any of the ingredients 

It is best to take Rennie tablets 1-2 hours after any other medicines to maximise the benefit of all medicines being used. Consult a doctor or Chemist4U pharmacist before taking these trapped wind tablets if you take any of the following medicines:

  • Tetracyclines and quinolones (antibiotics)

  • Levothyroxine (a thyroid hormone)

  • Eltrombopag (used to increase the number of platelets)

  • Digoxin (used for some heart conditions)

  • Thiazide diuretics (water tablets to treat fluid retention and high blood pressure)

  • Fluorides (for preventing dental caries) 

  • Phosphates (for clearing the bowel before a surgical procedure)

  • Iron supplements 

Rennie Deflatine contains sorbitol (E420). If you have been told you may be intolerant to some sugars, contact your doctor before taking these trapped wind tablets. 

Are there any side effects?

As with all medicines, these tablets can cause side effects, although not everybody gets them. As long as you take the recommended dose as instructed, you’re unlikely to experience any side effects at all from Rennie Deflatine.

Rarely, allergic reactions have been reported. If you experience any of the following signs of an allergic reaction, stop treatment immediately and seek medical advice: 

  • Rash

  • Itching

  • Difficulty breathing

  • Swelling of the face, mouth or throat

  • Anaphylactic shock (symptoms of which are low blood pressure, shock, palpitations, difficulty breathing, bronchospasm, skin reactions, abdominal pain or cramps, vomiting and diarrhoea)

Long term use in high doses can cause high blood levels of calcium and magnesium, especially in people with kidney conditions. Symptoms of this may include: 

  • Nausea

  • Vomiting

  • Upset stomach

  • Diarrhoea

  • Tiredness

  • Muscular weakness

  • Headache 

  • Kidney problems

  • Impaired sense of taste

In exceptionally rare cases, long term use in high doses can lead to milk alkali syndrome, which can cause high blood levels of calcium.

Storage Information

Keep out of reach and sight of children. Do not store above 25°C and keep in the original pack. Do not use Rennie Deflatine after the expiry date - referring to the last day of the stated month.

More Information

This product is a medicine; make sure to speak to your doctor or Chemist 4 U pharmacist before taking this product if you have an underlying medical problem or are taking any other medicine or complementary therapy. If your symptoms get worse or continue after taking this product, contact us or your doctor. For medical services in your area, please refer to

If you are pregnant, trying to become pregnant, or breastfeeding, speak to your doctor or our pharmacist before taking this product. If you suffer from any allergies, ask your doctor or our pharmacist if this medicine is right for you.

Store all medicines out of sight and reach of children.

Please read the included leaflet carefully before using this product.

Please contact your GP if appropriate regarding this product.


Helpful Advice on Medication Restrictions & Addiction

For further information on our medication restrictions policy, please click here.

If you are concerned about addiction to 'over the counter' medication, we urge you to visit the below links for professional help and advice:

Rennie Deflatine Sugar Free Mint – 36 Tablets Reviews

By Helen Tabern,
January 30, 2024
Does what it,says
By Angela Moorhouse,
September 12, 2023
Everything Perfect Thank You
By Derek Sladen,
August 29, 2023
Very hard to find at the moment, but had know problems on this site
By Heather,
August 15, 2023
Work well thanks
By Helen Tabern,
July 25, 2023
It works very well.
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