This can cause nausea and vomiting, upset stomach, diarrhoea, tiredness, muscular weakness, confusion, increased urine production, increased thirst and dehydration. The soluble chloride produced by the reaction of calcium with gastric acid reacts, in turn, with intestinal, biliary and pancreatic secretions to form insoluble salts, which are excreted in the faeces. The NICE British National Formulary (BNF) site is only available to users in the UK (England, Scotland, Wales and Northern Ireland). To maximise the benefit of all medicines being used, take Rennie Dual Action Tablets 1 to 2 hours after taking any other medicines. Although people often use the terms interchangeably, there is a difference between heartburn and indigestion.

A maximum daily dose of 8 g calcium carbonate, corresponding to 16 tablets a day, must not be exceeded.If you forget to take Rennie Dual Action Tablets: Do not take a double dose to make up for a forgotten dose. If using Rennie Peppermint, Rennie Spearmint or Rennie Sugar Free do not take more than 10 tablets a day. Rennie Dual Action Tablets are off white, speckled circular chewable tablets, flat on both sides with a bevelled edge. No increased risks of congenital defects have been observed after the use of this product during pregnancy.

See some of the most commonly asked questions on antacids, helping you get the best treatment for symptoms of heartburn and indigestion. If, after 14 days of treatment, symptoms persist or only partly disappear the patient should consult a doctor.Especially in patients with impaired renal function, prolonged use of high doses can result in hypercalcaemia and alkalosis.

If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.

Animal studies do not indicate direct or indirect harmful effects with respect to reproductive toxicity. 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. As Rennie Dual Action Tablets provide a substantial amount of calcium in addition to dietary calcium intake pregnant women should strictly limit their use of Rennie Dual Action Tablets to the maximum recommended daily dose and avoid concomitant, excessive intake of milk (1 litre contains up to 1. Please tell your doctor or pharmacist if you are taking or have recently taken any other medicines, including medicines obtained without a prescription.