Darolac Sachet contains Lactobacillus spores. Probiotics are live microorganisms (in most cases, bacteria) that are similar to beneficial microorganisms found in the human gut. They are also called friendly bacteria or good bacteria. Probiotics are available to consumers mainly in the form of dietary supplements and foods. Probiotics can cut bouts of infectious diarrhea by half a day to about 2 days. Antibiotics kill the bad germs in the body that make a person sick, but they also kill the good bacteria. This can disrupt the normal balance in your intestines, leading to diarrhea. Probiotics like lactobacillus is helpful in treating diarrhoea and boosting the gut immunity thus preventing further infection of pathogenic or bad bacteria. Use under medical supervision.