UK licensed medication

Next day delivery

Discreet packaging

Free expert advice & support

Ubayd Ali

Authored by

Ubayd Ali

Superintendent Pharmacist

Registration Number: 2219322

NHS Pharmacist and founding member of HEBA, with years of experience in healthcare across innovative organisations.
Sufyan Tahir

Reviewed by

Sufyan Tahir

Clinical Governance Lead

Registration Number: 2221275

Review Date 27 March 2026
Next Review 27 March 2028
Published on 27 March 2026
Last Update 27 March 2026

Description

Rennie Tablets provide effective relief from acid-related discomfort by directly neutralising excess stomach acid. The formulation works quickly in the stomach to reduce burning sensations and irritation caused by acid reflux or indigestion. Rennie Tablets are available in different flavours to suit personal preference and are convenient to carry for on-the-go use.

  • Fast-acting relief from heartburn and indigestion
  • Neutralises excess stomach acid
  • Suitable for use after meals or when symptoms occur
  • Available in a variety of flavours

Directions

Chew Rennie Tablets thoroughly before swallowing for best results. Adults and children over the recommended age may take one to two Rennie Tablets as needed, preferably one hour after meals and before bedtime. Additional doses may be taken if symptoms persist, but do not exceed the maximum daily amount stated on the packaging. If symptoms continue for more than fourteen days, consult a healthcare professional.

Ingredients

Rennie Tablets contain calcium carbonate and magnesium carbonate as the active ingredients, which work together to neutralise excess stomach acid. These ingredients react with stomach acid to form water and other neutral compounds, helping to relieve discomfort. Rennie Tablets also contain excipients such as flavourings and sweeteners to improve taste.

Always check the packaging for the full list of ingredients, especially if you have allergies or dietary considerations.

Warnings

Do not take Rennie Tablets if you are allergic to any of the ingredients or if you have high levels of calcium in your blood. Consult your doctor before using Rennie Tablets if you have kidney problems or are on a low-magnesium or low-calcium diet. Avoid exceeding the recommended dose, as prolonged excessive use may lead to side effects.

Keep Rennie Tablets out of sight and reach of children.


 
 
 

Verified customer reviews

Frequently asked questions

  • What are Rennie tablets used for?

    Rennie tablets are used to relieve heartburn, acid indigestion, and stomach discomfort caused by excess stomach acid. They work quickly to neutralize acid and ease burning sensations in the chest and throat.

     

  • How do Rennie tablets work in the body?

    Rennie tablets contain calcium carbonate and magnesium carbonate, which react with stomach acid to reduce acidity. This helps provide fast, effective relief from symptoms associated with acid reflux and indigestion.

     

  • Can Rennie tablets be taken after meals?

    Yes, they are often taken after meals or when symptoms occur to help manage discomfort. They can also be used before bedtime if heartburn tends to worsen at night.

     

  • Are Rennie tablets suitable during pregnancy?

    Rennie tablets are commonly considered for occasional heartburn during pregnancy due to their localized action in the stomach. However, it is important to consult a healthcare professional before use.

     

  • Do Rennie tablets cause any side effects?

    Most people tolerate Rennie tablets well when used as directed. In some cases, excessive use may cause mild digestive changes, so it is best to follow the recommended dosage guidelines.
     
     
     

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