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— free, 24/7 — free, 24/7| Dosage | Package | Price per Dose | Price | |
|---|---|---|---|---|
| 500mg | 90 pills | €1.16 | €104.72 Best Price Popular | |
| 500mg | 60 pills | €1.23 | €73.58 |
Disclaimer: This information is for general guidance only and does not replace professional medical advice. If you have questions or concerns, please speak to a pharmacist or a doctor, especially if you are pregnant, have a long-term condition, or take other medicines.
Rennie is a chewable medicine that contains calcium carbonate. It is used to relieve occasional heartburn, indigestion, and upset stomach by neutralising excess stomach acid. In Ireland, Rennie may be available over the counter or may require a prescription depending on local rules. Always read the product leaflet and follow the directions on the pack.
The tablets are designed to be chewed before swallowing. They come in convenient flavours and can be used when symptoms occur. If you are unsure about using Rennie, talk to a pharmacist before you start treatment. Do not use Rennie as a long‑term solution for ongoing symptoms without medical advice.
This information is based on the general description of calcium carbonate antacids. It is not a replacement for the official patient information leaflet. If you have questions about whether Rennie is suitable for you, check with a healthcare professional.
Rennie should be stored as advised on the packaging, away from moisture and heat. Keep it out of reach of children. If you notice any signs of allergy or an unusual reaction after taking Rennie, seek medical help promptly.
Rennie is used to relieve symptoms that come from excess stomach acid. This includes heartburn, acid indigestion, and some stomach discomfort after meals. It can be used when symptoms occur, rather than on a strict schedule. If symptoms are persistent or frequent, you should discuss them with a healthcare professional.
In general, Rennie is intended for temporary relief. It is not a cure for conditions such as gastroesophageal reflux disease (GERD) or ulcers. If you have symptoms unrelated to simple heartburn, or if your symptoms worsen, seek medical advice.
Rennie may help with occasional stomach upset that is linked to excess acid. It should not be used to treat other conditions unless advised by a professional. If you are unsure whether your symptoms are suitable for Rennie, speak with a pharmacist or doctor.
If you are taking other medicines, tell your pharmacist before using Rennie. Some medicines can be affected by calcium carbonate, and a professional can advise on how to take them safely together.
Calcium carbonate neutralises stomach acid. By reducing acidity, Rennie helps relieve the burning sensation of heartburn and the discomfort of indigestion. The effect is usually felt relatively quickly after chewing a tablet.
In addition to providing relief, Rennie also supplies calcium, an essential mineral for bone health. If you have specific concerns about calcium intake, discuss them with your doctor or pharmacist, particularly if you have conditions linked to calcium metabolism or kidney health.
Because Rennie acts locally in the stomach, it does not enter the bloodstream in the same way as systemic medications. This can limit interactions with some medicines, but it does not eliminate all potential interactions. Always review your full list of medicines with a healthcare professional when starting Rennie.
Rennie is intended for short-term relief of symptoms. If you find you need to use it regularly or for long periods, or your symptoms continue beyond a few days, you should seek medical advice. A healthcare professional can help determine the cause of your symptoms and discuss appropriate treatment.
Read the leaflet inside the packaging before taking Rennie. Take the tablets as directed on the pack or by your pharmacist. If you are unsure how to use Rennie, ask a pharmacist for help.
Chew the tablet well before you swallow. Do not swallow Rennie whole. You can take Rennie with or without food, but you should use it after you experience symptoms for best effect. If you need to use it for a long period, separate it from other medicines by asking your pharmacist for timing guidance.
Do not take more than the amount recommended on the packaging. If you accidentally take more than the stated amount, contact a pharmacist or doctor for advice. If you have a severe reaction after taking Rennie, seek medical help immediately.
If you are taking other medicines, check with a pharmacist about any potential interactions. Some medicines may need to be taken at a different time from Rennie or in a different way to avoid reduced effectiveness. Your doctor or pharmacist can provide specific advice for your situation.
Rennie should be used with caution by certain people. If you have a condition that affects calcium metabolism, kidney function, or a history of kidney stones, you should speak with a healthcare professional before using Rennie. They can advise whether Rennie is appropriate for you and may suggest an alternative.
People with high calcium levels (hypercalcemia) or a history of stones made from calcium should not use Rennie without medical supervision. If you experience symptoms such as severe abdominal pain, vomiting, or blood in stools, seek medical help promptly.
Rennie contains calcium carbonate, which is generally safe for many adults, but it should not be used as a substitute for professional medical care. If you have a known allergy to calcium carbonate or any other ingredients in Rennie, do not use the product and seek medical advice.
PREGNANCY AND BREASTFEEDING: If you are pregnant or breastfeeding, talk to a healthcare professional before using Rennie. They can help you decide if this medicine is appropriate for you at this time. Do not rely on general advice alone when your health or your baby’s health could be affected.
Rennie is intended for short-term relief of occasional symptoms. If symptoms persist beyond a few days, a different treatment, or a medical assessment, may be needed. Do not use Rennie as a long-term solution without professional advice.
If you have kidney problems or are on a restricted calcium diet, you should speak with a healthcare professional before using Rennie. They can help determine whether the product is appropriate and safe for you.
Think about other medicines you take. Calcium carbonate can interact with some medicines by affecting how they are absorbed. If you are taking prescription medicines or other antacids, talk to a pharmacist about potential interactions before using Rennie.
Keep Rennie out of reach of children. If a child accidentally takes Rennie, contact a healthcare professional for guidance. If a child shows signs of an adverse reaction after taking Rennie, seek medical help right away.
If you have a sudden, severe stomach pain or vomiting that is persistent, seek urgent medical help. These may be signs of a more serious condition that requires treatment.
Most people tolerate Rennie well, but some people may experience side effects. These are usually mild and temporary. If you notice any adverse effects, talk to a pharmacist or doctor, especially if the symptoms worry you or persist.
If you develop severe or long-lasting side effects, stop using Rennie and seek medical advice. Seek urgent medical help if you have signs of an allergic reaction or severe swelling or breathing difficulty.
Calcium carbonate can interact with some medicines by changing how they are absorbed in the gut. Tell your pharmacist about all medicines you take, including over‑the‑counter medicines, vitamins, and herbal products. They can help you plan how to take Rennie safely with your other medicines.
Typical medicines that may interact with calcium carbonate include certain antibiotics, iron supplements, thyroid medicines, and medicines used to treat osteoporosis. It is important to separate Rennie from other medicines if advised by a healthcare professional, and to follow their timing guidance.
If you have an ongoing treatment plan or take medicines regularly, do not start Rennie without discussing with your pharmacist or doctor. They can review your medications and adjust timing or dosing if needed.
Suppose you notice a change in how another medicine works after starting Rennie. In that case, contact a healthcare professional for advice. Do not stop or adjust prescribed treatments without guidance.
Pregnant people should use Rennie only after discussing with a healthcare professional. While calcium carbonate is sometimes used to relieve heartburn during pregnancy, there may be risks or alternatives that are more suitable for you and your baby.
The healthcare professional can assess your individual needs, including the timing and amount of Rennie, and whether there are safer options during pregnancy. Breastfeeding is another situation for which guidance from a professional is recommended.
If you are pregnant and need relief from heartburn, speak to your midwife, obstetrician, or pharmacist about appropriate options. Do not assume that any antacid is automatically safe in pregnancy without advice.
If you are unsure about using Rennie while pregnant or breastfeeding, seek professional advice before using the product.
Rennie is designed to act relatively quickly to relieve heartburn and indigestion. In many people, relief is felt within minutes after chewing a tablet. The duration of relief can vary depending on the person and the underlying cause of symptoms.
If symptoms do not improve after using Rennie as directed, or if they recur frequently, speak to a pharmacist or doctor for further evaluation. They can help determine the best course of action.
Rennie is intended to be used as directed on the packaging or by a pharmacist. Do not exceed the stated amount. If you have questions about how much to take, ask a pharmacist for guidance. Do not use Rennie as a long-term solution without medical advice.
If you forget to take a dose after symptoms return, do not double the next dose. Follow the instructions on the pack or ask a pharmacist for advice about what to do next.
Calcium carbonate can interact with certain medicines by affecting their absorption. Tell your pharmacist about all medicines you take, including over‑the‑counter medicines and supplements. They can advise on timing and any necessary precautions.
Do not change how you take your prescription medicines without speaking to a healthcare professional. If you have a complex treatment plan, a pharmacist can help you integrate Rennie safely.
If symptoms persist after using Rennie, or if you experience new or worsening symptoms, seek medical advice. Persistent heartburn or indigestion could be a sign of another condition that requires evaluation.
If you develop new swelling, difficulty swallowing, weight loss, or vomiting with blood, seek urgent medical help promptly.
Rennie is typically intended for adults and may have specific age restrictions on the packaging. If you are considering Rennie for a child, consult a pharmacist or doctor for appropriate guidance. Do not give the medicine to children unless the product labeling confirms it is suitable.
Constipation is a possible side effect of calcium-containing antacids like Rennie. If constipation becomes troublesome, talk to a pharmacist about options to manage it. If you notice any serious or persistent adverse effects, seek medical advice.
Other common effects can include belching, minor abdominal discomfort, or nausea. If you have concerns about side effects, a healthcare professional can provide guidance tailored to you.
Alcohol does not interact directly with Rennie in a way that is universally harmful, but alcohol can irritate the stomach and worsen symptoms for some people. If you notice symptoms worsened by alcohol, reduce or avoid intake while using Rennie and discuss this with a pharmacist if needed.
Rennie is intended for short-term relief of symptoms. If you require frequent or ongoing treatment, you should seek medical advice to identify the underlying cause of your symptoms. Long-term use without professional guidance is not recommended.
Your pharmacist or doctor can help determine whether continued use is appropriate for your situation and, if needed, suggest alternative remedies or investigations.
You can take Rennie after meals or when symptoms occur. Chew the tablet thoroughly before swallowing for best effect. If you have questions about timing with other medicines, ask a pharmacist for personalised advice.
If you know you are allergic to calcium carbonate or any ingredient in Rennie, do not use the product. Seek medical advice for alternative relief options and to avoid a reaction.
If you experience signs of an allergy after taking Rennie, such as rash, swelling, or breathing difficulties, seek urgent medical help.
Seek medical help if you have severe or persistent symptoms despite using Rennie as directed. Also seek help for sudden, severe stomach pain, vomiting, weight loss, blood in stools, or if you experience signs of an allergic reaction.
For any concerns about medication interactions or suitability, ask a pharmacist or doctor for advice. If in doubt, err on the side of caution and obtain professional guidance before continuing use.
Information provided here is based on the official patient information leaflet for Rennie Calcium Carbonate and general guidelines for over‑the‑counter antacids. For personalised advice, consult a pharmacist or doctor, especially if you have a chronic condition, are pregnant, or take other medicines.
14–21 days. Free from €170.52 .
5–9 days. €25.58
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−10% on all repeat orders.
All orders are packed in neutral, unbranded boxes with no product name on the outside.