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    Information about Metronidazole

    Metronidazole uses

    Metronidazole is used in the treatment of bacterial infections and parasitic infections. It is used in infections of the brain, reproductive system, gastrointestinal tract, skin, vagina, and other areas of the body.

    How metronidazole works

    Metronidazole is an antibiotic. It kills the bacteria and other microorganisms that cause infections by damaging their DNA.

    Common side effects of metronidazole

    Headache, Dryness in mouth, Nausea, Glossitis, Metallic taste, Stomatitis (Inflammation of the mouth), Muscle pain
    Content Details
    Written By
    Dr. Ashish Ranjan
    MD (Pharmacology), MBBS
    Reviewed By
    Dr. Varun Gupta
    MD (Pharmacology), MBBS
    Last updated on:
    12 Mar 2019 | 02:02 PM (IST)
    Want to know more?
    Read Our Editorial Policy

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    Expert advice for Metronidazole

    • Metronidazole treats infections caused by bacteria and protozoa.
    • It may also be used to prevent infections following surgery.
    • Always take the complete course of treatment, as advised by your doctor, even if you feel better.
    • It may cause side effects like nausea, stomach upset, and a metallic taste in the mouth.
    • Metronidazole use in a high dose or for a prolonged time increses risk of side effects such as nerve damage. Take it only as prescribed by your doctor.
    • Do not drink alcohol during or for 48 hours after treatment with this medicine. You may develop nausea, vomiting, flushing and headache.
    • Inform your doctor if you have a liver disease. Your dose may need to be adjusted in severe liver disease.

    Frequently asked questions for Metronidazole


    Q. Can the use of Metronidazole cause metallic taste?

    Yes, Metronidazole may cause a temporary metallic taste. This metallic taste can be reduced by chewing sugar-free gum or mints, brushing teeth after the meals and by staying hydrated.

    Q. Why it is harmful to drink alcohol while using Metronidazole?

    Alcohol should be strictly avoided while taking Metronidazole and for at least 3 days after completely stopping the medicine. Drinking alcohol can cause an unpleasant reaction (Disulfuram reaction) with symptoms such as stomach pain, nausea, vomiting, headache, flushing or redness of the face.

    Q. Can I stop taking Metronidazole when I feel better?

    No, do not stop taking Metronidazole and complete the full course of treatment even if you feel better. Your symptoms may improve before the infection is completely cured.

    Content on this page was last updated on 12 March, 2019, by Dr. Varun Gupta (MD Pharmacology)