Metronidazole 200mg tablets are indicated for the treatment of various infections caused by anaerobic bacteria and certain parasites, contraindicated in patients with a history of hypersensitivity to metronidazole or during the first trimester of pregnancy, potential side effects include nausea, headache, and dizziness, and it may interact with alcohol, resulting in a disulfiram-like reaction, as well as with anticoagulants such as warfarin, increasing bleeding risk.