Metronidazole Tablets 500 MG are an antibiotic used to treat bacterial infections in the vaginal area, the stomach, the lungs, the heart, and the bloodstream. It is also used to treat trichomoniasis, a parasitic infection spread through sexual contact. Although metronidazole has been found to reduce postoperative pain, it is not routinely utilised. It is safe to use. It is advised to take the drug with a meal or snack if it bothers your stomach.