COLVIS DUO DRY SYRUP with a formulation of Colistin Sulphate 25 mg is a polymyxin antibiotic used for the treatment of susceptible gastrointestinal bacterial infections caused by Gram-negative organisms. It works by disrupting the bacterial cell membrane, leading to bacterial cell death and helping control the growth of infection-causing bacteria. With its localized action in the gastrointestinal tract, COLVIS DUO Dry Syrup provides effective management of intestinal bacterial infections where Colistin therapy is indicated.