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Metronidazole - Dosage and How to Use

How should Metronidazole be used?

Oral Metronidazole

  • Metronidazole may be taken with or after food.
  • Complete the course of antibiotics as prescribed by your doctor. Incomplete treatment may cause infections to happen again.
  • Do check with your healthcare professional before stopping your medication.

    Metronidazole/Nystatin vaginal pessary
  • Place one vaginal pessary deep into your vagina. Do this at bedtime. You may wear a sanitary pad to prevent the medicine from getting onto your clothing. Do not use tampons.
  • The medication may come with an applicator specially designed to be used with the vaginal pessary.
  • Wash and dry your hands before administering the pessary.
  • Pull back the applicator plunger about 2.5cm.
  • Remove the pessary from its plastic wrapping. Insert the pessary into the cup at the end of the applicator.
  • Lie on your back with your knees drawn up towards your chest. Insert the applicator into your vagina as far as it will comfortably go.
  • Be sure the applicator is in the correct position in your vagina before you push the plunger.
  • Push the plunger fully to place the pessary in your vagina.
  • Remove the applicator. Wash with soap and warm water. Rinse thoroughly and dry. 

    Topical Metronidazole (gel)
  • Wash and dry your hands before and after using the medicine.
  • Clean and dry the area that you will be applying Metronidazole on. Apply a thin layer of the medicine.
  • Topical Metronidazole is usually applied 1 to 2 times a day. Follow your doctor's instructions.
  • Avoid your eyes, nose, mouth and lips when you apply Metronidazole on your skin. Wash with water if the medicine gets into any of these areas. Avoid applying onto broken or irritated skin as it can worsen the skin condition.

What should I do if I miss a dose?

If you forget to take a dose, take it as soon as you remember. If it is close to the time for your next dose, skip the missed dose and go back to your usual timing. Do not take two doses at the same time to make up for the missed dose.

What should I do if I overdose?


  • Updated on 7/31/2021 12:00:00 AM
  • Article contributed by PSS National Medication Information Workgroup PSS National Medication Information Workgroup
The information provided is not intended as medical advice. Terms of use. Information provided by SingHealth

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