metronidazole 400mg tablets is an antibiotic and antiprotozoal medication commonly used to treat a variety of bacterial and parasitic infections. It is often prescribed for conditions such as dental infections, skin infections, gastrointestinal infections, bacterial vaginosis, and certain intestinal parasites. Metronidazole works by stopping the growth of harmful microorganisms, helping the body fight infection effectively. The tablets should be taken exactly as directed by a healthcare professional, usually with or after food to reduce stomach discomfort. Completing the full course of treatment is important, even if symptoms improve earlier, to help prevent the infection from returning. Patients should avoid alcohol while taking Metronidazole 400mg tablets and for a short period after treatment, as it may cause unpleasant side effects.