Abstract
Irritable bowel syndrome (IBS) is a disabling disorder that affects most of the population in all over the world. Symptoms of irritable bowel syndrome include recurrent abdominal pain, altered bowel habits, and bloating. Irritable bowel syndrome is part of a broader group of disorders known as functional gastrointestinal (GI) disorders. Herbal medicines have been used in Unani system of medicine for a long time. Most of the patients are beginning to receive herbal medicines. The aim of this study is to review the usage of herbal medicine in irritable bowel syndrome.