Combantrin-1 with Mebendazole Chocolate Squares

Combantrin-1 with Mebendazole Chocolate Squares is a brand of medicine containing the active ingredient mebendazole.

Find out more about active ingredients.

Consumer medicine information (CMI) leaflet

Developed by the pharmaceutical company responsible for this medicine in Australia, according to TGA regulations.

Combantrin-1 with Mebendazole
Chocolate Squares


Consumer Medicine Information

What is in this leaflet?

This leaflet answers some common questions about Combantrin-1 with Mebendazole.

It does not contain all the available information.

It does not take the place of talking to your pharmacist.

All medicines have risks and benefits.

Your pharmacist has weighed the risks of you taking Combantrin-1 with Mebendazole against the benefits it is expected to have for you.

If you have any concerns about taking this medicine, ask your pharmacist.

Keep this leaflet with the medicine. You may need to read it again.

Back to top

What Combantrin-1 with Mebendazole is used for

Combantrin-1 with Mebendazole is a single dose treatment for threadworm in adults and children of 2 years and over.

It is also effective against other worm infections such as roundworm, hookworm and whipworm. If infection with other worms is suspected, consult your doctor for positive worm identification

Combantrin-1 with Mebendazole is available without a prescription. However, your doctor may have special instructions on its use.

Back to top

Before you take Combantrin-1 with Mebendazole

When you must not take it

Do not take Combantrin-1 with Mebendazole if:

  1. you are allergic to:
  • Combantrin-1 with Mebendazole or similar medicines
  • any of the ingredients listed at the end of this leaflet
  1. the foil packaging has been broken or damaged
  2. the expiry date on the packaging has passed
If you take Combantrin-1 with Mebendazole after the expiry date has passed, it may not work as well.

Do not give Combantrin-1 with Mebendazole to children under 2 years of age.

Before you start to take it

Tell your doctor or pharmacist if:

  1. you have any allergies to any other medicines or any other substances such as foods, preservatives or dyes
  2. you have any medical or health problems.

Do not take Combantrin-1 with Mebendazole if you are pregnant or breast feeding unless advised by your doctor.

If you have not told your doctor or pharmacist about any of the above, tell them before you start taking Combantrin-1 with Mebendazole.

Taking other medicines

Tell your doctor or pharmacist if you are taking any other medicines, including medicines you buy without a prescription from a pharmacy, supermarket or health food shop.

Back to top

How to take Combantrin-1 with Mebendazole

To help clear up your infection completely, take this medicine exactly as directed by your doctor or pharmacist.

In some people, a second course of this medicine may be needed to clear up the infection completely.

How much to take


Adults and children of 2 years and over: 1 chocolate square (100mg) as a single dose

A repeat dose is recommended after 2 to 4 weeks if reinfestation occurs.

Roundworm, whipworm & hookworm:

Adults and children of 2 years and over : 1 chocolate square (100mg) twice each day for 3 consecutive days.

Combantrin-1 with Mebendazole chocolate squares may be taken with or without food.

If you forget to take it

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule.

Do not double dose.

If you take too much (overdose)

Telephone the Poisons Information Centre (Australia 13 1126; New Zealand 03 4747000) straight away for advice if you or anyone else may have swallowed much Combantrin-1 with Mebendazole. Do this even if there are no signs of discomfort or poisoning.

If you take too much Combantrin-1 with Mebendazole, you may get stomach pains, diarrhoea, feel sick or vomit.

Back to top

While you are using it

Things you must do

Treat all household members at the same time with Combantrin-1 with Mebendazole. Threadworms and other worm infections can be easily passed from one person to another, especially in a household. Treating all household members at the same time will help prevent infection and reinfection. All household members may have to be treated again in 2 to 4 weeks time to clear the infection up completely.

To reduce the risk of reinfection, make sure you and other members of your family:

  • wear shoes
  • wash your hands with soap and clean under your finger nails often during the day, especially before eating and after using the toilet
  • wash all fruits and vegetables thoroughly before using them

If you become pregnant while taking Combantrin-1 with Mebendazole, tell your doctor.

If your symptoms do not improve within a few days, or if they become worse, check with your doctor. In some people, worm infections may return after treatment with Combantrin-1 with Mebendazole. Washing (not shaking) all bedding and night clothes (pyjamas) after treatment may help prevent this.

Back to top

Side effects

Check with your doctor or pharmacist as soon as possible if you have any problems while taking Combantrin-1 with Mebendazole, even if you do not think the problems are connected with the medicine or are not listed in this leaflet. Like other medicines, Combantrin-1 with Mebendazole can cause some side effects. If they occur, most are likely to be minor and temporary.

Ask your doctor or pharmacist to answer any questions you may have.

Tell your doctor or pharmacist if you notice any of the following and they worry you:

  • stomach pain or upset
  • diarrhoea
  • feeling sick (nausea) or vomiting

Back to top

After using Combantrin-1 with Mebendazole


Keep this medicine where young children cannot reach it. A locked cupboard at least 11/2 metres above the ground is a good place to store medicines.

Keep Combantrin-1 with Mebendazole in a cool, dry place where the temperature stays below 25°C. Do not store it or any other medicine in the bathroom or near a sink.

Do not leave it in the car or on window sills. Heat can destroy some medicines.


If the expiry date on the packaging has passed, ask your pharmacist what to do with the chocolate squares.

Back to top

Product description

What it looks like

Brown chocolate block consisting of four scored squares, each imprinted with the Pfizer.


Active ingredients:

Each chocolate square contains 100mg Mebendazole.

Other ingredients:

  • compounded chocolate
  • palm kernel oil


Combantrin-1 with Mebendazole is supplied in Australia by:

Pfizer Pty Limited
(ACN 008 422 348)
38-42 Wharf Road
West Ryde NSW 2114

Pfizer Laboratories Ltd
Auckland New Zealand

Australian Registration Number: AUST R 72602.

This leaflet was revised on 9 December 1999.

TGA Approval Date: 6 January 2000.

Back to top

CMI provided by MIMS Australia, December 2014  

Related information - Combantrin-1 with Mebendazole Chocolate Squares


02 Nov 2012 Find reliable, independent information about threadworm. You’ll find resources for consumers and health professionals about this health condition and any related treatments, medicines and medical tests.
29 Oct 2012 Information on medicines available in Australia containing mebendazole, including our latest evidence-based information and resources for health professionals and consumers. The active ingredient is the chemical in a medicine that makes it work. Medicines that contain the same active ingredient can be available under more than one brand name. Brands include both active ingredients and inactive ingredients. You'll find information about brands of medicines that contain mebendazole below, including their consumer medicine information (CMI) leaflets.