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Benznidazole tablets

What is this medication?

BENZNIDAZOLE (benz nid' a zole) treats infections caused by certain parasites. It is an antiprotozoal agent. It will not treat colds, the flu, or infections caused by bacteria or viruses.

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This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Benznidazole

What should I tell my care team before I take this medication?

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

  • Cockayne syndrome
  • Low blood counts, like low white cell, platelet, or red cell counts
  • Tingling of the fingers or toes, or other nerve disorder
  • An unusual or allergic reaction to benznidazole, other medications, foods, dyes, or preservatives
  • Pregnant or trying to get pregnant
  • Breast-feeding

How should I use this medication?

Take this medication by mouth with water. Take it as directed on the prescription label at the same time every day. You can take it with or without food. If it upsets your stomach, take it with food. Some tablets may be broken at score lines as directed. Tablets may also be crushed and mixed with water and made into a slurry. Follow the directions on the prescription label or those given to you by your pharmacist. Keep taking it unless your care team tells you to stop.

Talk to your care team regarding the use of this medication in children. While it may be prescribed for children as young as 2 years for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

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NOTE: This medicine is only for you. Do not share this medicine with others.

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 may interact with this medication?

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

  • Disulfiram

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Visit your care team for regular checks on your progress. Tell your care team if your symptoms do not start to get better or if they get worse.

This medication may cause serious skin reactions. They can happen weeks to months after starting the medication. Contact your care team right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. Or, you might notice a red rash with swelling of the face, lips or lymph nodes in your neck or under your arms.

Do not become pregnant while taking this medication. Women should inform their care team if they wish to become pregnant or think they might be pregnant. If you are a female who can become pregnant, you should use effective birth control during treatment and for at least 5 days after treatment. There is a potential for serious side effects to an unborn child. Talk to your care team for more information.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

  • Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
  • Fever or chills, sore throat
  • Pain, tingling, or numbness in the hands or feet
  • Rash, fever, and swollen lymph nodes
  • Redness, blistering, peeling, or loosening of the skin, including inside the mouth
  • Trouble breathing
  • Unusual bruising or bleeding
  • Unusual weakness or fatigue

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

  • Diarrhea
  • Dizziness
  • Headache
  • Nausea, vomiting
  • Stomach pain

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store between 20 and 25 degrees C (68 and 77 degrees F). Protect from moisture. Keep the container tightly closed. Get rid of any unused medication after the expiration date.

To get rid of medications that are no longer needed or have expired:

  • Take the medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
  • If you cannot return the medication, check the label or package insert to see if the medication should be thrown out in the garbage or flushed down the toilet. If you are not sure, ask your care team. If it is safe to put it in the trash, take the medication out of the container. Mix the medication with cat litter, dirt, coffee grounds, or other unwanted substance. Seal the mixture in a bag or container. Put it in the trash.

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NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.

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