Metro 400 mg Tablet is a broad-spectrum antibiotic effective against anaerobic bacterial infections and certain protozoal infections. It is commonly prescribed for conditions like amoebiasis, giardiasis, trichomoniasis, and bacterial vaginosis. The active ingredient, Metronidazole, disrupts the DNA of susceptible organisms, inhibiting their ability to reproduce and causing cell death. This medication is typically administered orally, with the dosage and duration determined by the specific infection being treated. It's essential to complete the full course of treatment to ensure the infection is fully eradicated and to prevent the development of resistance.