Metrogyl 400 Tablet is used in treatment or management of Diarrhoea or dysentry, infections. Learn more about its uses, side effects, dosage, composition, price and order it online from PharmEasy with fast delivery and extra discount. What if you want to buy an FMCG product but are not sure which one? You cannot expect the pharmacist to give you too many options. Apollo Pharmacy is the solution to all these. Metro 400mg Tablet contains metronidazole , an antibiotic and antiprotozoal medicine that works by entering the bacterial or parasitic cells and damaging their DNA.