Rennie Liquid Heartburn Relief Mint – 150ml

Description

Rennie Liquid Heartburn Relief Mint – 150ml

Rennie Liquid Heartburn Relief Mint is an antacid liquid used to relieve the symptoms of heartburn, acid reflux, and indigestion. It has a pleasant peppermint flavour, making it a popular alternative to the traditional Rennie tablets.

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How It Works

Rennie Liquid works by neutralising excess stomach acid that causes the burning sensation associated with heartburn and indigestion. The active antacid ingredients — calcium carbonate and magnesium carbonate — react quickly with stomach acid to bring fast, effective relief.

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Directions for Use

Adults and children aged 12 years and over: take 10–20 ml after meals and at bedtime, up to four times a day. Shake the bottle well before use. Do not exceed the recommended dose. This medicine is not recommended for children under 12 years of age. Always read the patient information leaflet before use. If you are unsure about the correct dose, speak to your PillSorted pharmacist.

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Active Ingredients

• Calcium carbonate 520 mg per 10 ml dose
• Magnesium carbonate (light) 235 mg per 10 ml dose

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Possible Side Effects

Rennie Liquid is generally well tolerated, but some people may experience:
• Constipation
• Diarrhoea
• Flatulence (wind)
• Nausea
• Changes in bowel habits
If you experience any serious side effects, stop taking this medicine and seek medical advice immediately.

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Who Should Not Take This Medicine

Do not take this medicine if:
• You are allergic to any of the active or inactive ingredients
• You have severely reduced kidney function (severe renal impairment)
• You have high levels of calcium in your blood (hypercalcaemia)
• You have high levels of magnesium in your blood (hypermagnesaemia)
• You are under 12 years of age
• You have been told to follow a low-calcium diet

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Interactions

Antacids such as Rennie Liquid can affect the absorption of some other medicines. Calcium and magnesium carbonate may reduce the absorption of medicines including tetracycline antibiotics, certain medicines for osteoporosis (bisphosphonates), thyroid medicines (levothyroxine), iron supplements, and some heart medicines. It is generally recommended to take other medicines at least 2 hours before or after taking Rennie Liquid. Tell your PillSorted pharmacist or doctor about all medicines you are currently taking, including herbal remedies and supplements.

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Pregnancy and Breastfeeding

Rennie Liquid is generally considered suitable for use during pregnancy and breastfeeding at recommended doses, and it is often recommended as a first-line antacid option for heartburn in pregnancy. However, individual circumstances vary. Speak to your doctor or PillSorted pharmacist before use if you are pregnant, trying to conceive, or breastfeeding.

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Alcohol

There are no known significant interactions between Rennie Liquid and alcohol. However, alcohol can worsen heartburn and acid reflux symptoms, so it is advisable to limit alcohol consumption if you are experiencing these conditions.

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Driving and Operating Machinery

Rennie Liquid is not known to cause drowsiness or impair concentration. It is not expected to affect your ability to drive or operate machinery.

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Storage

Store below 25°C in a dry place, away from direct sunlight. Do not refrigerate or freeze. Keep out of sight and reach of children. Do not use after the expiry date shown on the packaging.

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Important Information

• This product is a medicine. Speak to your doctor or PillSorted pharmacist before taking this product if you have an underlying medical condition or are taking any other medication or complementary therapy.
• If symptoms worsen or persist, contact your doctor.
• If pregnant, trying to conceive or breastfeeding, seek medical advice before use.
• If you suffer from allergies, confirm suitability with your PillSorted pharmacist before use.
• Store out of sight and reach of children.
• Read the enclosed patient information leaflet carefully before use.
• Contact your GP where appropriate.

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Patient Information Leaflet

For the full Patient Information Leaflet (PIL) for this medicine, visit the electronic Medicines Compendium (EMC). For further information about this medicine, visit NHS.uk.

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This content has been medically reviewed and approved by Zeinab Ardeshir (GPhC 2075730), Superintendent Pharmacist at PillSorted (GPhC-registered online pharmacy 9011258). Last reviewed: February 2026.

Brand	RENNIE