Understanding Acid Reflux and Barrett’s Oesophagus: The Role of Medications

Understanding Acid Reflux and Barrett’s Oesophagus: The Role of Medications

Around 10-20% of adults in Western countries experience symptoms of gastro-oesophageal reflux disease (GORD) on a weekly basis, with heartburn and acid reflux being the most common symptoms. A smaller proportion, approximately 10-15% of people with long-term GORD symptoms, develop Barrett’s oesophagus during their lifetime. In this blog, I will discuss GORD, its effects on the oesophagus, its potential link to Barrett’s oesophagus, and what current evidence suggests about the role of medications

What is GORD?

Gastro-oesophageal reflux disease, commonly shortened to GORD, occurs when stomach acid flows back into the oesophagus (food pipe), the muscular tube that connects the mouth to the stomach. Under normal conditions, a ring of muscle at the bottom of the oesophagus, known as the lower oesophageal sphincter, acts as a barrier that prevents stomach contents from moving upward. In people with GORD, this barrier may not function effectively, allowing acid to repeatedly enter the oesophagus. Common symptoms of GORD include heartburn, acid regurgitation and noncardiac chest pain.

How acid reflux can affect the oesophagus

The oesophagus functions primarily to transport food and liquids to the stomach, but its lining is not well adapted to repeated exposure to stomach acid. When reflux occurs frequently, the acidic environment can irritate the lining of the oesophagus. This irritation may lead to inflammation and damage to the tissue.

Over time, the body may respond to this repeated irritation by altering the type of cells that line the lower part of the oesophagus. These cellular changes provide insight into how chronic reflux may affect the oesophageal lining.

GORD and Barrett’s Oesophagus

One possible outcome of chronic acid reflux is Barrett’s oesophagus. In this condition, the cells lining the lower oesophagus undergo abnormal changes. This change is thought to occur as an adaptive response to repeated exposure to stomach acid.

Barrett’s oesophagus itself does not usually cause noticeable symptoms beyond those associated with reflux. However, it is considered a precursor that carries an increased risk of developing oesophageal adenocarcinoma. It is important to note that most people with Barrett’s oesophagus do not develop cancer, and studying its progression from GORD helps explain how the oesophageal lining changes.