Generic Name: metronidazole, Oral tablet

Flagyl

All Brands

  • Flagyl
SECTION 1 of 4

Highlights for metronidazole

Oral tablet
1
METRONIDAZOLE (me troe NI da zole) is an antiinfective. It is used to treat certain kinds of bacterial and protozoal infections. It will not work for colds, flu, or other viral infections.
2 3 4 5
Talk to your healthcare provider if you have any of these conditions.
6
Know what to watch for and get tips for reducing your risks while taking this drug.
SECTION 2 of 4

metronidazole Side Effects

Oral tablet

Side effects that you should report to your doctor or health care professional as soon as possible:

  • allergic reactions like skin rash or hives, swelling of the face, lips, or tongue
  • confusion, clumsiness
  • difficulty speaking
  • discolored or sore mouth
  • dizziness
  • fever, infection
  • numbness, tingling, pain or weakness in the hands or feet
  • trouble passing urine or change in the amount of urine
  • redness, blistering, peeling or loosening of the skin, including inside the mouth
  • seizures
  • unusually weak or tired
  • vaginal irritation, dryness, or discharge

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • diarrhea
  • headache
  • irritability
  • metallic taste
  • nausea
  • stomach pain or cramps
  • trouble sleeping
SECTION 3 of 4

metronidazole May Interact with Other Medications

Oral tablet

Do not take this medicine with any of the following medications:

  • alcohol or any product that contains alcohol
  • amprenavir oral solution
  • cisapride
  • disulfiram
  • dofetilide
  • dronedarone
  • paclitaxel injection
  • pimozide
  • ritonavir oral solution
  • sertraline oral solution
  • sulfamethoxazole-trimethoprim injection
  • thioridazine
  • ziprasidone

This medicine may also interact with the following medications:

  • birth control pills
  • cimetidine
  • lithium
  • other medicines that prolong the QT interval (cause an abnormal heart rhythm)
  • phenobarbital
  • phenytoin
  • warfarin
Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. This information is not a substitute for medical advice. Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.
SECTION 4 of 4

How to Use metronidazole

Oral tablet

Take this medicine by mouth with a full glass of water. Follow the directions on the prescription label. Take your medicine at regular intervals. Do not take your medicine more often than directed. Take all of your medicine as directed even if you think you are better. Do not skip doses or stop your medicine early.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • anemia or other blood disorders
  • disease of the nervous system
  • fungal or yeast infection
  • if you drink alcohol containing drinks
  • liver disease
  • seizures
  • an unusual or allergic reaction to metronidazole, or other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding
What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What should I watch for while using this medicine?

Tell your doctor or health care professional if your symptoms do not improve or if they get worse.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.

Avoid alcoholic drinks while you are taking this medicine and for three days afterward. Alcohol may make you feel dizzy, sick, or flushed.

If you are being treated for a sexually transmitted disease, avoid sexual contact until you have finished your treatment. Your sexual partner may also need treatment.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature below 25 degrees C (77 degrees F). Protect from light. Keep container tightly closed. Throw away any unused medicine after the expiration date.

What does the pill look like?

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Last Updated: July 25, 2014

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