Biflor 250mg sachets contain the active ingredient Saccharomyces boulardii, which is a type of yeast that helps to restore the balance of bacteria in the gut. It is used to treat diarrhea that is caused by antibiotics or by a bacterial infection, such as Clostridium difficile (C. difficile). Biflor works by inhibiting the growth of harmful bacteria and stimulating the growth of beneficial bacteria in the gut, which helps to restore the natural balance of bacteria and improve digestive health