Vizylac Capsule belongs to the class of 'probiotics', primarily used to treat diarrhoea. Vizylac Capsule also effectively treats irritable bowel syndrome, lactose intolerance, Crohn's disease (inflammatory bowel disease), and bacterial overgrowth in the intestines. Diarrhoea is a condition in which bowel movements are too frequent, leading to loose and watery stools. Acute diarrhoea is a common problem and generally lasts for one or two days, whereas chronic diarrhoea lasts four weeks.