How Antacids Work

Antacids are over-the-counter (OTC) medicines used to neutralise stomach acid. They're commonly used to relieve Heartburn, Indigestion, Acid reflux, and Sour stomach (also known as dyspepsia or Indigestion).
They offer fast, on-the-spot relief by elevating the pH levels of stomach contents, providing the comfort you need.

How Antacids Work

Antacids are alkaline compounds that interact with hydrochloric acid (HCl) present in the stomach, effectively neutralising it. This reaction helps alleviate irritation in both the stomach lining and the oesophagus, providing relief from the uncomfortable sensations of burning and discomfort often associated with acid-related issues. By balancing the acidity, antacids help restore a sense of calm to the digestive tract, allowing individuals to experience greater ease and comfort.

Common Ingredients Used In Antacids

• Calcium carbonate is an effective ingredient found in products like Rennie and Bisodol, known for their strong and fast-acting relief.
• Sodium bicarbonate is found in products like Alka-Seltzer and Gaviscon, which provide rapid but short-lived relief.
• Alginate Products such as Peptac and Acidex create a protective barrier that effectively helps prevent acid reflux.
• Aluminium hydroxide Pepto Bismol offers slower but longer-lasting relief.

When To Take Antacids

• After meals or before bedtime.
• When experiencing heartburn or indigestion.
• Not usually needed daily unless advised by a healthcare provider

Cautions And Interactions

Do not use long term without GP advice

Persistent symptoms could signal:

• Gastroesophageal reflux disease (GORD)
• Peptic ulcers.
• H. pylori infection.
• Other conditions requiring specific treatment.

May Interfere With The Absorption Of:

• Iron.
• Tetracycline antibiotics.
• Levothyroxine.
• Bisphosphonates (e.g., alendronic acid).
• Leave a 2-hour gap between antacids and other medicines.
• Avoid sodium-containing ones if: You have high blood pressure, heart disease, or kidney problems.

Antacids for Children & Pregnancy

Rennie and Gaviscon have pregnancy-safe versions (but check with midwife or GP).
Paediatric antacids like Infacol or Gaviscon Infant can be used for colic or reflux under medical advice.