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Rennie Deflatine (18,36)

  • Rennie Deflatine chewable tablets relieve heartburn, indigestion, bloating, and trapped wind.
  • They combine antacids with simeticone for fast relief of discomfort.
  • Suitable for adults aged 18 and over, but may not be right for everyone.
  • Buy online from a licensed UK pharmacy.
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Pharmacy, clinic and prescribers based in Greater Manchester.

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About Rennie Deflatine

Medication Name Rennie Deflatine
Type and Form of Medicine Chewable tablets
What it Does Relieves heartburn, indigestion, bloating and trapped wind
Active Ingredients Calcium carbonate, magnesium carbonate, simeticone
Strength Each tablet contains calcium carbonate 680mg, heavy magnesium carbonate 80mg, simeticone 25mg
Size Available in packs of 18 or 36 tablets
Patient Information Leaflet Click here

What is Rennie Deflatine?

Rennie Deflatine is a chewable antacid tablet that combines calcium carbonate and magnesium carbonate to neutralise excess stomach acid, with simeticone to disperse gas bubbles. It provides relief from heartburn, indigestion, bloating, and trapped wind.

What is Rennie Deflatine used for?

  • Heartburn and acid indigestion
  • Bloating and fullness caused by trapped wind
  • Discomfort after meals

How does Rennie Deflatine work?

  • Calcium carbonate & magnesium carbonate: Neutralise excess stomach acid for fast indigestion and heartburn relief.
  • Simeticone: Helps break down and disperse trapped gas bubbles, reducing bloating and discomfort.

Who is Rennie Deflatine suitable for?

Rennie Deflatine is suitable for adults aged 18 years and over. It is not recommended for children or adolescents under 18.

Do not take if you:

  • Are allergic to any of the ingredients
  • Have severe kidney disease, kidney stones, or high calcium levels
  • Have low phosphate levels

Pregnancy and breastfeeding: Rennie Deflatine can be used if taken as directed. Do not exceed the maximum dose and avoid excessive milk or dairy intake.

How to take Rennie Deflatine

  1. Adults (18+): Chew or suck 1–2 tablets as required.
  2. Do not take more than 11 tablets in 24 hours.
  3. Leave 1–2 hours between Rennie Deflatine and other medicines.
  4. Do not use for longer than 2 weeks without medical advice.

Rennie Deflatine Side Effects

Rennie Deflatine is generally well tolerated. Side effects are unlikely if taken at the recommended dose.

Possible Side Effects

  • Rare: Allergic reactions (rash, swelling, difficulty breathing)
  • Prolonged or excessive use: high calcium levels, nausea, stomach upset, constipation or diarrhoea

Seek medical help immediately if you experience signs of a serious allergic reaction.

Rennie Deflatine Ingredients

Active Ingredients: Calcium carbonate 680mg, heavy magnesium carbonate 80mg, simeticone 25mg per tablet.

Other Ingredients: Sorbitol (E420 ~430mg), magnesium stearate, potato starch, pre-gelatinised maize starch, talc, mint flavour, lemon flavour.

Contains sorbitol (a source of fructose). Not suitable if you have hereditary fructose intolerance or certain sugar intolerances.

Important Information

  • Do not exceed the stated daily dose (max 11 tablets in 24 hours).
  • Not suitable for children under 18 years.
  • Do not use if you have severe kidney problems, kidney stones, high calcium or low phosphate levels.
  • Leave 1–2 hours between Rennie Deflatine and other medicines.
  • Store below 25°C in the original pack, out of sight and reach of children.

Rennie Deflatine (18,36) Reviews

FAQs


Heartburn, indigestion, trapped wind and bloating. The antacids neutralise excess acid while simeticone disperses gas.

Chew or suck 1–2 tablets as needed, up to 11 tablets in 24 hours. Do not use for more than 2 weeks without medical advice.

Yes, but separate doses by 1–2 hours because antacids can affect absorption of certain medicines (e.g., some antibiotics, thyroid, HIV, osteoporosis, iron and others). Ask a pharmacist if unsure.

Yes — if taken as directed. Do not exceed the maximum daily dose, avoid prolonged high doses, and avoid excessive milk/dairy. Speak to a healthcare professional if you need ongoing treatment.

No. It is not recommended under 18 years.

It contains sorbitol (E420) rather than sucrose. If you have hereditary fructose intolerance or have been told you’re intolerant to some sugars, speak to your doctor before use.

Our Experienced UK-based Pharmacy Team

Clinical Consultant
MUDr, MRCEM, EBCEM, FRCEM
GMC no. 7176414

Pharmacist
MPharm
GPhC no. 2065469

Pharmacist
MPharm
GPhC no. 2046514

Page content authored by Muhammad, last reviewed by Amjad Khan on 15th September 2025.

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