Take metronidazole exactly as prescribed by your doctor. Follow all directions on your prescription label and read all medication guides or instruction sheets. Metronidazole oral is taken by mouth. The injection is given as an infusion into a vein. A healthcare provider will give you the injection if you are unable to take the medicine by mouth. Shake the oral suspension (liquid). Measure a dose with the supplied measuring device (not a kitchen spoon). Swallow the extended-release tablet whole and do not crush, chew, or break it. If you are treating a vaginal infection, your sexual partner may also need to take metronidazole so you don't become reinfected. Metronidazole is usually given for up to 10 days in a row. You may need to repeat this dosage several weeks later. Keep using this medicine even if your symptoms quickly improve. The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so. The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine. For oral dosage forms (capsules or tablets): For amebiasis infections: Adults: 500 or 750 milligrams (mg) 3 times a day for 5 to 10 days. Children: Dose is based on body weight and must be determined by your doctor. The dose is usually 35 to 50 milligrams (mg) per kilogram (kg) of body weight per day, divided into 3 doses, for 10 days. For bacterial infections: Adults: Dose is based on body weight and must be determined by your doctor. The dose is usually 7.5 milligrams (mg) per kilogram (kg) of body weight every 6 hours for 7 to 10 days. Your doctor may increase your dose as needed. However, the dose is usually not more than 4000 mg per day. Children: Use and dose must be determined by your doctor. For trichomoniasis infections: Adults: The tablet can be given 3 different ways: As a single dose of 2 grams. As 1 gram 2 times a day for 1 day. As 250 milligrams (mg) 3 times a day for 7 days. Children: Use and dose must be determined by your doctor. For oral dosage form (extended-release tablets): For bacterial vaginosis: Adults: 750 milligrams (mg) once a day for 7 days. Children: Use and dose must be determined by your doctor.

Metronidazole