If you take more Rennie Dual Action Tablets than you should: Drink plenty of water and consult your doctor or pharmacist. Symptoms of an overdose include nausea and vomiting, constipation, tiredness, increased urine production, increased thirst, dehydration and abnormal muscular weakness. It has been shown that antacids which contain calcium may form complexes with certain substances e.g. antibiotics (such as tetracyclines and quinolones) and cardiac glycosides (e.g. digoxin), biphosphonates, dolutegravir, levothyroxine, and eltrombopag, resulting in decreased absorption. This should be borne in mind when concomitant administration is considered.

No increased risks of congenital defects have been observed after the use of this product during pregnancy. Patients with rare hereditary problems of fructose intolerance, glucose- galactose malabsorption or sucrase-isomaltase insufficiency should not take this medicine. Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use.This product contains 14 mg of sodium (main component of cooking/table salt) in each tablet. This is equivalent to 0.7%of the recommended As with other antacid products, taking these tablets can mask the symptoms of other, more serious, underlying medical conditions. If symptoms persist after fourteen days consult your doctor. The maximum recommended daily dose should not be exceeded and should not be taken for more than 2 weeks. If symptoms persist or only partly disappear after 2 weeks, medical advice should be sought.

Taking Rennie Dual Action Tablets with milk or dairy products over a long period of time may cause milk alkali syndrome, which can cause high blood levels of calcium. Specific symptoms of milk alkali syndrome may include impaired sense of taste, headache, kidney problems, fatigue and lumps under the skin. As with all calcium containing antacid products intake with large amounts of milk or dairy products should be refrained. Changes in gastric acidity, such as that caused by the ingestion of antacids, can affect the rate and degree to which some concurrently administered medicines are absorbed.Rennie Dual Action Tablets can be used during pregnancy and breast feeding if taken as instructed above. Always take this medicine exactly as described in this leaflet or as your doctor or pharmacist has told you. Consult your doctor or pharmacist if you have an underlying medical condition, are taking any other medication or complementary therapy, or if symptoms persist Long term uses at high doses can result in undesirable effects such as hypercalcaemia and milk-alkali syndrome, especially in patients with renal insufficiency.

Hypersensitivity reactions have very rarely been reported. Clinical symptoms may include rash, urticaria, pruritus, angioedema, difficulty in breathing and anaphylaxis. If taking antibiotics (tetracyclines, quinolones), cardiac glycosides (digoxin, digitoxin), bisphosphonates (used for the treatment of osteoporosis), dolutegravir (an anti-retroviral medicine used for the treatment of HIV infection), levothyroxine (a thyroid hormone), eltrombopag (a medicine used to increase the number of platelets) or other prescribed medicines (e.g. fluorides, phosphate, iron containing products) speak to your doctor before taking Rennie Dual Action Tablets because it can affect how these medicines work. To maximise the benefit of all medicines being used, take Rennie Dual Action Tablets 1 to 2 hours after taking any other medicines. Calcium carbonate is excreted in human milk, but at therapeutic doses of the product no effects on the breastfed newborns/infants are anticipated. Rennie contains an antacid which neutralises excess stomach acid simply by turning it into water and other natural substances, rather than masking it.Especially in patients with impaired renal function, prolonged use of high doses can result in hypercalcaemia and alkalosis. Alginic acid forms a protective barrier in the stomach to stop acid escaping upwards, soothing that burning pain in your chest Please tell your doctor or pharmacist if you are taking or have recently taken any other medicines, including medicines obtained without a prescription. Rennie Orange Flavour fast-acting tablets get to work within minutes to provide effective relief from heartburn, indigestion and acid reflux. Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.

Caution should be exercised in patients with mild to moderate impairment of renal function (see section 4.3 – contraindication in severe renal insufficiency). If Rennie is used in such patients, plasma calcium and phosphate levels should be regularly monitored. Alternatively one strip of 8 tablets is presented in a cardboard sample wallet which may contain one or more cut-out "windows". Calcium salts can also impede the absorption of phosphates, fluorides and iron-containing products.Long term use of high doses can cause high blood levels of calcium and magnesium, especially in people with kidney conditions. This can cause nausea and vomiting, upset stomach, diarrhoea, tiredness, muscular weakness, confusion, increased urine production, increased thirst and dehydration. The active substances are calcium carbonate (625mg), magnesium carbonate (73.5mg) and alginic acid (150mg).