Patients with rare hereditary problems of fructose intolerance, glucose- galactose malabsorption or sucrase-isomaltase insufficiency should not take this medicine.

Alginic acid forms a protective barrier in the stomach to stop acid escaping upwards, soothing that burning pain in your chest The active substances are calcium carbonate (625mg), magnesium carbonate (73.5mg) and alginic acid (150mg). The stated dose should not be exceeded. If, after 14 days of treatment, symptoms persist or only partly disappear the patient should consult a doctor. 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 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. Especially in patients with impaired renal function, prolonged use of high doses can result in hypercalcaemia and alkalosis.

Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.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. 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. Alternatively one strip of 8 tablets is presented in a cardboard sample wallet which may contain one or more cut-out "windows". Rennie should not be used in patients with hypercalciuria (see also section 4.3). Prolonged use increases the risk of formation of renal calculi. Rennie Dual Action Tablets can be used during pregnancy and breast feeding if taken as instructed above.