• Basic Info
• Top Questions

What is this medicine?

THIABENDAZOLE is an anthelmintic. It is used to treat infections caused by roundworms, hookworms, pinworms, whipworms, or threadworms.

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

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
• dehydration
• kidney disease
• liver disease
• malnutrition
• other chronic illness
• an unusual or allergic reaction to thiabendazole, other medicines, foods, dyes or preservatives
• pregnant or trying to get pregnant
• breast-feeding

How should I use this medicine?

Take this medicine by mouth. Follow the directions on the prescription label. Chew or crush the tablets before swallowing. Take after meals. You can mix this medicine with juice or semi-solid food (such as applesauce or pudding). Take at regular intervals. Do not take your medicine more often than directed. Finish the full course of medicine prescribed by your doctor or health care professional even if you feel better.

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

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

• aminophylline
• caffeine
• theophylline

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 medicine?

Visit your doctor or health care professional to check that your infection has gone. If you have a severe infection you may need a second course of tablets.

Wash your hands, scrub your fingernails and shower often. Every day change and launder bedclothes, linens, and undergarments. This will help keep other family members from getting infected. Disinfect the toilet every day, and damp mop the floors often to reduce the number of worm eggs.

Other people in your house may need treatment. Check with your doctor or health care professional as some worms are spread easily. Treat cats and dogs regularly for worms.

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.

What side effects may I notice from receiving this medicine?

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

• allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
• blurred vision
• diarrhea
• difficulty breathing
• dry eyes
• dry mouth or persistent cough
• fever or chills, sore throat
• redness, blistering, peeling or loosening of the skin, including inside the mouth
• seizures
• unusually weak or tired
• yellowing of eyes or skin

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

• dizziness
• loss of appetite
• nausea, vomiting
• ringing in the ears
• 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.