Indigestion can cause pain in the chest - Edexcel - GCSE Chemistry - Question 2 - 2011 - Paper 1

Indigestion tablets typically contain antacids that neutralize excess stomach acid. When the stomach produces too much acid, it can lead to discomfort and pain in the chest due to irritation of the stomach lining or esophagus. The active ingredients in the tablets react with the hydrochloric acid in the stomach, resulting in a chemical reaction that produces water and salts, effectively reducing acidity and soothing irritation. This alleviation of pain allows individuals to feel more comfortable and reduces the sensations of heartburn and indigestion.