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metronidazole

Pronunciation: me troe NI da zole

Brand: Flagyl, Flagyl 375, Flagyl ER

Flagyl 375 mg

capsule, gray/green, imprinted with FLAGYL, 375mg

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Flagyl 500 mg

oblong, blue, imprinted with 500, FLAGYL

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Flagyl ER 750 mg

elliptical, blue, imprinted with SEARLE 1961, FLAGYL ER

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Metronidazole 250 mg-DAN

round, white, imprinted with DAN, 5540

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Metronidazole 250 mg-MUT

round, white, imprinted with MP 45

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Metronidazole 250 mg-SID

round, white, imprinted with SL 333

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Metronidazole 250 mg-TEV

round, white, imprinted with 93, 851

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Metronidazole 250 mg-WAT

round, white, imprinted with 5540, DAN

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Metronidazole 500 mg-MUT

oval, white, imprinted with MP 46

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Metronidazole 500 mg-SCH

round, white, imprinted with 5552, DAN DAN

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Metronidazole 500 mg-TEV

oblong, white, imprinted with 93 93, 852

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Metronidazole 500 mg-WAT

round, white, imprinted with 5552, DAN DAN

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Metronidazole 500mg-SID

oblong, white, imprinted with SL 334

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What is the most important information I should know about metronidazole?

Multum finish

Take this medication for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Metronidazole will not treat a viral infection such as the common cold or flu.

Multum noalcohol

Do not drink alcohol while you are taking metronidazole and for at least 3 days after you stop taking it. You may have unpleasant side effects such as fast heartbeats, warmth or redness under your skin, tingly feeling, nausea, and vomiting.

What is metronidazole?

Metronidazole is an antibiotic. It fights bacteria in your body.

Metronidazole is used to treat bacterial infections of the vagina, stomach, skin, joints, and respiratory tract. This medication will not treat a vaginal yeast infection.

Metronidazole may also be used for purposes not listed in this medication guide.

What should I discuss with my healthcare provider before taking metronidazole?

Multum donot

You should not use this medication if you are allergic to metronidazole, or if you are in the first trimester of pregnancy. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Before taking metronidazole, tell your doctor if you are allergic to any drugs, or if you have:

  • liver disease;
  • a stomach or intestinal disease such as Crohn's disease;
  • a blood cell disorder such as anemia (lack of red blood cells) or leukopenia (lack of white blood cells);
  • epilepsy or other seizure disorder; or
  • nerve disorders.

If you have any of these conditions, you may need a dose adjustment or special tests to safely take this medication.

Multum nobrfeed

Metronidazole can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

How should I take metronidazole?

Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

Multum icon26

Take the extended-release metronidazole tablet (Flagyl ER) on an empty stomach, at least 1 hour before or 2 hours after eating a meal.

Multum nocrush

Do not crush, chew, or break an extended-release tablet. Swallow it whole. Breaking the pill may cause too much of the drug to be released at one time.

Multum finish

Take this medication for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Metronidazole will not treat a viral infection such as the common cold or flu.

To be sure this medication is not causing harmful effects, your blood may need to be tested often. Your liver function may also need to be tested. Visit your doctor regularly.

This medication can cause unusual results with certain medical tests. Tell any doctor who treats you that you are using metronidazole.

Multum rt

Store at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Multum emt

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include nausea, vomiting, dizziness, loss of balance or coordination, numbness and tingling, or seizures (convulsions).

What should I avoid while taking metronidazole?

Multum noalcohol

Do not drink alcohol while you are taking metronidazole and for at least 3 days after you stop taking it. You may have unpleasant side effects such as fast heartbeats, warmth or redness under your skin, tingly feeling, nausea, and vomiting.

Check the labels of any medicines or food products you use to make sure they do not contain alcohol.

Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, stop taking metronidazole and call your doctor. Do not use anti-diarrhea medicine unless your doctor tells you to.

What are the possible side effects of metronidazole?

Multum emt

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Multum donot

Call your doctor at once if you have any of these serious side effects:

  • numbness or tingling in your hands or feet;
  • white patches or sores inside your mouth or on your lips;
  • pain or burning when you urinate;
  • diarrhea that is watery or bloody;
  • vision problems, pain behind your eyes;
  • trouble concentrating, slurred speech, mood or behavior changes, tremors, muscle twitching, seizure (convulsions);
  • fever, chills, muscle pain, confusion, headache, sore throat, neck stiffness, increased sensitivity to light, drowsiness, nausea and vomiting; or
  • severe skin reaction -- fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.

Less serious side effects may include:

  • stomach pain, diarrhea;
  • dizziness, loss of balance;
  • vaginal itching or discharge;
  • dry mouth or unpleasant metallic taste;
  • cough, sneezing, runny or stuffy nose; or
  • swollen or sore tongue.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect metronidazole?

Tell your doctor about all other medicines you use, especially:

  • cimetidine (Tagamet);
  • seizure medication such as phenytoin (Dilantin) or phenobarbital (Luminal, Solfoton);
  • a blood thinner such as warfarin (Coumadin, Jantoven);
  • lithium (Lithobid, Eskalith, others); or
  • disulfiram (Antabuse).

This list is not complete and other drugs may interact with metronidazole. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about metronidazole.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2013 Cerner Multum, Inc. Version: 10.01. Revision date: 2/14/2011.

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