About metronidazole
Nitroimidazole antibiotic and antiprotozoal
Used for
- Treats serious infections caused by susceptible anaerobic bacteria
- Treats certain protozoal infections when intravenous treatment is appropriate
Usual adult dose
Usually 500 mg intravenously every 8 hours; dose and duration depend on infection and local guidance.
Usual dose in children
Usually 7.5 mg/kg intravenously every 8 hours; maximum 500 mg per dose. Depends on age and infection.
Common side effects
- Nausea, vomiting, or diarrhea
- Metallic taste
- Headache or dizziness
- Infusion-site irritation
Important warnings
- Avoid alcohol during treatment and for at least 48 hours afterward.
- Seek urgent care for seizures, numbness, or severe allergic reaction.
- Use caution with severe liver disease or blood disorders.
- Complete the prescribed course; unnecessary use promotes antibiotic resistance.
Pregnancy
Use only when clinically needed; treatment decisions depend on infection and pregnancy stage.
Breastfeeding
Small amounts enter milk. Discuss treatment and breastfeeding with a healthcare professional, especially for repeated or high doses.
Interactions
- Warfarin and other coumarin anticoagulants: may increase bleeding risk.
- Lithium: may raise lithium levels.
- Disulfiram: risk of confusion or psychotic reactions.
- Alcohol or propylene glycol: may cause unpleasant reactions.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.