About norfloxacin
Fluoroquinolone antibiotic
Used for
- Certain urinary tract infections
- Bacterial prostatitis caused by susceptible bacteria
Usual adult dose
Usually 400 mg by mouth every 12 hours; duration depends on infection.
Common side effects
- Nausea or diarrhea
- Headache or dizziness
- Tendon pain or rupture
- Nerve symptoms such as tingling
Important warnings
- Fluoroquinolones can rarely cause disabling tendon, nerve, or nervous-system effects.
- Avoid use with myasthenia gravis; it may worsen muscle weakness.
- May cause abnormal heart rhythm or blood-sugar changes.
- Use only for susceptible bacterial infections; resistance limits usefulness.
Pregnancy
Generally avoided during pregnancy when safer alternatives are available; evidence is limited.
Breastfeeding
Use requires clinical assessment; possible infant effects include diarrhea or thrush.
Interactions
- Antacids, iron, zinc, and calcium reduce absorption; separate doses.
- Warfarin may have increased effects and bleeding risk.
- May increase theophylline or caffeine levels.
- Corticosteroids increase tendon injury risk.
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 It may be incomplete or out of date.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.