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Metronidazole Tablets and Capsules

Generic name: Metronidazole Tablets and Capsules [ met-roe-NYE-da-zole ]
Brand name: Flagyl
Drug classes: Amebicides, Miscellaneous antibiotics

Medically reviewed by Last updated on Sep 21, 2023.


  • Metronidazole has been shown to cause cancer in mice and rats with long-term use. Talk with the doctor.
  • The doctor has given you this medicine (metronidazole tablets and capsules) for a certain health problem. Do not use this medicine (metronidazole tablets and capsules) for other health problems.

Uses of Metronidazole Tablets and Capsules:

What do I need to tell my doctor BEFORE I take Metronidazole Tablets and Capsules?

This is not a list of all drugs or health problems that interact with this medicine (metronidazole tablets and capsules).

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this medicine (metronidazole tablets and capsules) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Metronidazole Tablets and Capsules?

How is this medicine (Metronidazole Tablets and Capsules) best taken?

Use this medicine (metronidazole tablets and capsules) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

What do I do if I miss a dose?

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

What are some other side effects of Metronidazole Tablets and Capsules?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Metronidazole Tablets and Capsules?

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Frequently asked questions

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.