Our stomach produces acid to help with the digestion of the food and also to kill germs. This stomach acid is corrosive in nature thus our body produces a natural mucous barrier which will protect the lining of the stomach from being worn away. In case of some people this barrier may have broken due to some reason allowing the acid to damage the stomach and causing stomach ulcer. In case of others there can be a problem in their muscular band which is placed at the top of the stomach which keeps the stomach tightly closed; which may allow the acid to escape and irritate the gullet (oesophagus). This is called acid reflux, which can cause heartburn sour stomach acid indigestion and stomach upset.
Antacids are a class of medicines that neutralize the acid in your stomach.They do this becausesome of this contain chemicals (ingredients) such as aluminium, calcium, magnesium, or sodium bicarbonate which are bases (alkalis) in nature and can counteract stomach acids. The reaction between an acid and base is called neutralisation which makes the stomach acids less corrosive. Thus can help to relieve the pain related with ulcers and the burning sensation during acid reflux.Some antacids also contains certain ingredients that helps your body get rid of gas.
Antacids are often taken to get relief from the symptoms or when the symptoms are expected. When taken at the recommended dosage, for short period of time, antacids are considered safe.But Antacids that are consumed at a very high dose for a long period of time then it can also cause a condition called acid rebound. This is when the stomach produces more acid after you have consumed your food and drinks. So if your symptoms do not go away after taking medicines for a prolonged period then seek advice from your doctor. Your doctor will advise you of the dose needed and how often you should take it as per your age, sex, weight and other medical conditions.