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You are here : 3-RX.com > Drugs & Medications > Detailed Drug Information (USP DI) > Metronidazole : Proper Use

Metronidazole (Systemic)

Brand Names : Flagyl, Flagyl 375, Flagyl ER, Flagyl I.V., Flagyl I.V. RTU, Metric 21, Metro I.V., Protostat, Apo-Metronidazole, Novonidazol, Trikacide

Metronidazole | Before Using | Proper Use | Precautions | Side Effects | Additional Information

Proper Use of This Medicine

If this medicine upsets your stomach, it may be taken with meals or a snack. If stomach upset (nausea, vomiting, stomach pain, or diarrhea) continues, check with your doctor. If you are taking the extended-release formulation, you should try to take it an hour before or two hours after your meal.

To help clear up your infection completely, keep taking this medicine for the full time of treatment , even if you begin to feel better after a few days. If you stop taking this medicine too soon, your symptoms may return.

In some kinds of infections, this medicine works best when there is a constant amount in the blood. To help keep the amount constant, do not miss any doses. Also, it is best to take the doses at evenly spaced times, day and night . For example, if you are to take 4 doses a day, the doses should be spaced about 6 hours apart. If this interferes with your sleep or other daily activities, or if you need help in planning the best times to take your medicine, check with your health care professional.

Dosing - The dose of metronidazole 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 metronidazole. If your dose is different, do not change it unless your doctor tells you to do so.

The number of capsules or tablets 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 taking metronidazole .

  • For oral dosage forms (capsules, tablets):
    • For bacterial infections:
      • Adults and teenagers - Dose is based on body weight. The usual dose is 7.5 milligrams (mg) per kilogram (kg) (3.4 mg per pound) of body weight, up to a maximum dose of 1 gram, every six hours for at least seven days.
      • Children - Dose is based on body weight. The usual dose is 7.5 mg per kg (3.4 mg per pound) of body weight every six hours; or 10 mg per kg (4.5 mg per pound) every eight hours.
    • For amebiasis infections:
      • Adults and teenagers - 500 to 750 mg three times a day for five to ten days.
      • Children - Dose is based on body weight. The usual dose is 11.6 to 16.7 mg per kg (5.3 to 7.6 mg per pound) of body weight three times a day for ten days.
    • For trichomoniasis infections:
      • Adults and teenagers - A single dose of 2 grams; or 1 gram two times a day for one day; or 250 mg three times a day for seven days.
      • Children - Dose is based on body weight. The usual dose is 5 mg per kg (2.3 mg per pound) of body weight three times a day for seven days.
  • For oral dosage form (extended release tablets):
    • For bacterial vaginosis:
      • Adults and teenagers - 750 mg once a day for seven days.
      • Children - Use and dose must be determined by your doctor.
  • For injection dosage form:
    • For bacterial infections:
      • Adults and children over 1 week of age - Dose is based on body weight. The usual dose is 15 mg per kg (6.8 mg per pound) of body weight one time to start, then 7.5 mg per kg (3.4 mg per pound) of body weight injected into a vein every six hours for at least seven days.
      • Preterm infants - Dose is based on body weight. The usual dose is 15 mg per kg (6.8 mg per pound) of body weight one time to start, then 7.5 mg per kg (3.4 mg per pound) of body weight, injected into a vein, every twelve hours starting forty-eight hours after the first dose.
      • Full-term infants - Dose is based on body weight. The usual dose is 15 mg per kg (6.8 mg per pound) of body weight one time to start, then 7.5 mg per kg (3.4 mg per pound) of body weight, injected into a vein, every twelve hours starting twenty-four hours after the first dose.
    • For treatment before and during bowel surgery:
      • Adults and teenagers - Dose is based on body weight. The usual dose is 15 mg per kg (6.8 mg per pound), injected into a vein, one hour before surgery, then 7.5 mg per kg (3.4 mg per pound) of body weight, injected into a vein, six hours and twelve hours after the first dose.
      • Children - Use and dose must be determined by your doctor.

Missed dose - If you miss a dose of this medicine, take it as soon as possible. This will help to keep a constant amount of medicine in the blood. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage - To store this medicine:

  • Keep out of the reach of children.
  • Store away from heat and direct light.
  • Do not store the capsule or tablet form of this medicine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
  • Do not keep outdated medicine or medicine no longer needed. Be sure that any discarded medicine is out of the reach of children.

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Metronidazole: Before Using

 

Metronidazole: Precautions



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