Before taking metronidazole, tell your doctor if you are allergic to any drugs, or if you have:
liver disease;
a stomach or intestinal disease such as Crohn's disease;
a blood cell disorder such as anemia (lack of red blood cells) or leukopenia (lack of white blood cells);
epilepsy or other seizure disorder; or
nerve disorders.
If you have any of these conditions, you may need a dose adjustment or special tests to safely take this medication.
Metronidazole can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.