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

Indigestion tablets typically work by neutralizing excess stomach acid. When the stomach produces too much hydrochloric acid, it can create a burning sensation or pain in the chest area. The ingredients in indigestion tablets, such as antacids, interact with the hydrochloric acid, leading to a reduction in acidity in the stomach.

This neutralization alleviates the discomfort associated with indigestion, providing relief from symptoms such as heartburn and chest pain. Additionally, some indigestion tablets may contain compounds that reduce gas or promote digestive function, further contributing to the relief of pain.