Variety of delivery options including next day & free delivery.
Pharmacy, clinic and prescribers based in Greater Manchester.
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Variety of delivery options including next day & free delivery.
Pharmacy, clinic and prescribers based in Greater Manchester.
Start your treatment with a quick and free online consultation.
Fill in a quick online consultation for our licensed pharmacists to review.
Our pharmacists will review your treatment to ensure it’s suitable.
Your treatment will be delivered to your door quickly & discreetly.
| Medication Name | Rennie Liquid Heartburn Relief |
| Type and Form of Medicine | Oral suspension (liquid antacid) |
| What it Does | Provides fast relief from heartburn, acid reflux, and indigestion |
| Active Ingredients | Sodium alginate, sodium bicarbonate, calcium carbonate |
| Strength | Per 10ml: sodium alginate 500mg, sodium bicarbonate 267mg, calcium carbonate 160mg |
| Size | 150ml bottle |
| Patient Information Leaflet | Click here |
Rennie Liquid Heartburn Relief is a fast-acting liquid antacid that soothes burning in the chest and reduces acid reflux. It neutralises excess stomach acid and forms a protective barrier over the stomach contents, helping prevent heartburn and indigestion.
Suitable for adults and children over 12 years. Not recommended if you:
Generally well tolerated. Possible side effects include:
Seek medical advice if side effects occur or if symptoms persist beyond 7 days.
Active Ingredients: Sodium alginate 500mg, sodium bicarbonate 267mg, calcium carbonate 160mg per 10ml.
Other Ingredients: Carbomer, methyl hydroxybenzoate (E218), propyl hydroxybenzoate (E216), saccharin sodium, peppermint oil, purified water.
Rennie Liquid Heartburn Relief is used to treat heartburn, acid reflux, and indigestion. It provides fast relief by neutralising stomach acid and forming a protective barrier to prevent reflux.
Rennie Liquid usually works within minutes by soothing the burning sensation of heartburn and easing indigestion symptoms.
Yes, Rennie Liquid can be used during pregnancy and breastfeeding if recommended by your doctor or midwife. Always check with a healthcare professional before use.
Adults and children over 12 should take 10–20ml after meals and at bedtime, up to 4 times per day. Do not exceed 80ml in 24 hours. Always shake the bottle before use.
Rennie Liquid is suitable for children over 12 years. For younger children, only give under medical advice.
Rennie Liquid is generally well tolerated, but some people may experience constipation, diarrhoea, allergic reactions, or changes in calcium or sodium levels with prolonged use. Seek medical advice if side effects occur.
Rennie Liquid may affect how some medicines work by altering stomach acidity. If you are taking other medicines, especially for the heart or antibiotics, consult your doctor or pharmacist before use.
You can buy Rennie Liquid Heartburn Relief online from a licensed UK pharmacy such as Click2Pharmacy, or from local high-street pharmacies.
Page content authored by Muhammad, last reviewed by Amjad Khan on 20th January 2026.
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