Mebendazole is used to treat intestinal worm infections such as pinworm, roundworm, and hookworm.
OTHER USES: This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.
This drug may also be used for worm infections elsewhere in the body (e.g., trichinosis). In these cases, it is usually taken more often and for a longer time.
This medication is taken by mouth and can be taken with or without food. It may be chewed, swallowed whole, or crushed and mixed with food.
Dosage is based on your medical condition and response to therapy.
For treatment of pinworm infections, the medication is usually given as a single dose. If necessary, a second treatment may be given in a few weeks. For other types of common worm infections (e.g., roundworm, hookworm), take mebendazole by mouth for 3 days, usually twice a day in the morning and in the evening, or as directed by your doctor. If necessary, a second treatment may be given in a few weeks. For other types of infections, follow your doctor's directions. Your doctor may order you to take this medication more often than twice a day and for longer than 3 days.
It is very important to continue taking this medication exactly as prescribed by your doctor. Do not skip any doses. Continue to take this medication until the full prescribed amount is finished, even if symptoms disappear. Stopping the medication too early may result in a return of the infection.
Inform your doctor if your condition persists or worsens.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor immediately if any of these rare but very serious side effects occur: severe abdominal pain, easy bleeding/bruising, signs of serious infection (e.g., fever, persistent sore throat), unusual/extreme tiredness, seizures, weakness, dark or pinkish urine, yellowing eyes/skin.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking mebendazole, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.
The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly. These drug interactions are possible, but do not always occur. Your doctor or pharmacist can often prevent or manage interactions by changing how you use your medications or by close monitoring.
To help your doctor and pharmacist give you the best care, be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products) before starting treatment with this product. While using this product, do not start, stop, or change the dosage of any other medicines you are using without your doctor's approval.
This document does not contain all possible drug interactions. Keep a list of all the products you use. Share this list with your doctor and pharmacist to lessen your risk for serious medication problems.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Do not share this medication with others.
If you are taking this medication for a long time, laboratory and/or medical tests (e.g., complete blood count, liver/kidney function tests) may be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
Pinworm infections can easily spread to others. All family members in close contact with the patient should be treated to decrease the chance of spreading the infection.
Practice strict hygiene to prevent another infection. Wash hands frequently, especially after using the bathroom. Disinfect toilets daily. Change and launder undergarments, towels, and bedclothes daily.
If you are taking more than one dose and miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store at room temperature between 59-77 degrees F (15-25 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.
Information last revised March 2013. Copyright(c) 2013 First Databank, Inc.
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