Rennie Spearmint Tablets

• Adults: suck or chew 1 or 2 tablets when needed. No water is needed.
• Do not take more than 11 tablets in 24 hours.
• Do not take continuously for longer than 2 weeks. If your symptoms have not improved, or have got worse, after 7 days, see your doctor.
• If you take other medicines, take Rennie 1 to 2 hours after them.
• Not recommended for children and young people under 18.

Safety information

Who should not use it

Do not take if you are allergic to calcium carbonate, magnesium carbonate or any of the ingredients; if you have severe kidney disease or kidney stones; if you have high levels of calcium in your blood, kidneys or urine; or if you have low levels of phosphate in your blood.

Warnings & precautions

Talk to your doctor before use if you have any kidney problems. If you are 55 or over and have new, unexplained or persistent heartburn, see your doctor before using an antacid, as it can hide the symptoms of a more serious condition. Pain from the heart can feel like indigestion, so get medical advice if your pain does not go away. Taking high doses for a long time can raise calcium and magnesium levels in the blood and may increase the risk of kidney stones. Avoid large amounts of milk or dairy products while taking these tablets. Rennie can affect how some other medicines work, including certain antibiotics (tetracyclines and quinolones), digoxin, thiazide diuretics, bisphosphonates, dolutegravir, levothyroxine, eltrombopag, and iron, fluoride or phosphate supplements. Talk to your pharmacist first, and take Rennie 1 to 2 hours after other medicines. Each tablet contains 250mg of sucrose and 250mg of glucose, so speak to your doctor first if you have an intolerance to some sugars. These may be harmful to teeth.

Pregnancy & breastfeeding

Rennie can be used during pregnancy and breastfeeding if taken as directed. If you are pregnant, stay within the maximum daily dose, avoid using it for long periods, and avoid large amounts of milk or dairy products. Ask your doctor or pharmacist if you are unsure.

Possible side effects

Side effects are unlikely at the recommended dose. Very rarely, a severe allergic reaction can occur: stop taking the tablets and get medical help straight away if you have a rash, itching, swelling or difficulty breathing. Taking high doses for a long time, especially with kidney problems, can cause high calcium or magnesium levels, with symptoms such as nausea, vomiting, stomach discomfort, constipation or diarrhoea, headache and muscle weakness.

Always read the label

This is a medicine. Always read the label and patient information leaflet before use. If symptoms persist, talk to your doctor or pharmacist.

Calcium carbonate 680mg and heavy magnesium carbonate 80mg per tablet. Also contains sucrose (250mg) and glucose (250mg) per tablet, and less than 1mmol (23mg) of sodium per tablet, so it is essentially sodium-free.

Rennie Spearmint Tablets Patient Information Leaflet