Patients who suffer from irritable bowel syndrome (IBS) and constipation often find relief from a combination of therapies. This book presents current research in the study of the symptoms, diagnosis and treatment options for IBS and constipation. Topics discussed include constipation in Parkinson's disease; the role of serotonin in irritable bowel syndrome; clinical trials of emerging therapies in chronic idiopathic constipation; the role of primary afferent nocicpetors in visceral pain associated with IBS; the pathophysiology of IBS with diarrhoea; and chronic constipation in the elderly.