Thiabendazole (Oral)

Thiabendazole (By Mouth)

Thiabendazole (thye-a-BEN-da-zole)

Treats infections caused by hookworms, roundworms, threadworms, pork worms (trichinosis), and other kinds of worms.

Brand Name(s):

There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had an allergic reaction to thiabendazole.

How to Use This Medicine:

Chewable Tablet, Liquid

  • Your doctor will tell you how much medicine to take and how often.  
  • Chew the chewable tablet well before swallowing.  
  • It is best to take your medicine after a meal.  
  • Shake the oral liquid bottle well before each use.  
  • Measure your oral liquid dose carefully with a measuring spoon or medicine cup.

If a dose is missed::

  • Take the missed dose as soon as possible, unless it is almost time for your next dose.  
  • Skip the missed does if it is almost time for your next regular dose.  
  • You should not use two doses at the same time.

How to Store and Dispose of This Medicine:

  • Store the medicine at room temperature, away from heat, moisture, and direct light. Do not freeze.  
  • Keep all medicine out of the reach of children.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are taking theophylline.

Warnings While Using This Medicine:

  • Talk with your doctor before taking thiabendazole if you have liver or kidney disease.  
  • If you are pregnant or breastfeeding, talk to your doctor before taking this medicine.  
  • This medicine may make you dizzy or drowsy. Avoid driving or using machinery.  
  • This medicine may blur your vision or make everything you see look yellow (yellow vision). If you have questions about this, talk with your doctor.  
  • This medicine treats worm infections but will not prevent worm infections.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

  • Rash or hives  
  • Red peeling skin  
  • Fever or chills  
  • Bloody urine or dark-colored urine  
  • Seizures  
  • Yellowing of eyes or skin

If you notice these less serious side effects, talk with your doctor:

  • Blurred vision, yellow vision  
  • Feeling dizzy or drowsy  
  • Headache  
  • Nausea  
  • Dry mouth, nose, or eyes  
  • Bad odor of your urine  
  • Ringing in your ears  
  • Flushing (redness or warmth in your face)

Johns Hopkins patient information

Copyright 1996-2014 Cerner Multum, Inc. Version: 16.02.
Revision date: June 22, 2011
Last revised: by Sebastian Scheller, MD, ScD

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

The drug reference included in this section is provided by Cerner Multum, Inc., of Denver, Colorado. Armenian Medical Network receives monthly updates from Multum.