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Active substance: MEBENDAZOLE

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If you have been told by your doctor that you have an intolerance
to some sugars.
■ If you are taking any other medicines, including:
■ Metronidazole (a drug used to treat bacterial and protozoan
infections) as a serious skin reaction can rarely occur.
■ Cimetidine (used to treat excess stomach acidity).
If you are not sure about any of the medicines you are taking,
show the bottle or pack to your pharmacist.
If any of the bullet points apply to you now or in the past, talk to
a doctor or pharmacist.

This medicine is used to treat threadworm infections of the gut.
■ This medicine is for use by adults and children aged over 2 years.
■ Do not use this medicine:
■ There are some people who should not use this medicine. To find
out if you are one of them see section 2 c
■ If you have ever had a bad reaction to any of the ingredients. To
view the list of ingredients see section 6 c
■ Speak to your doctor:
■ If you suffer from any of the conditions mentioned in Section 2.
See section 2 c
■ If you are taking any other medicines. See section 2 c
■ Follow the dosage instructions carefully. These are shown in the
dosage table. See section 3 c
Now read this whole leaflet carefully before you use this medicine.
Keep the leaflet: you might need it again.

1 What the medicine is for
Ovex Suspension is a medicine, which is used to treat threadworm
(sometimes known as pinworm) infections of the gut. The medicine
contains mebendazole, which is one of a group of medicines called
This medicine is for use in adults and children aged over 2 years.

2 Before taking this medicine
This medicine is suitable for most adults and children, but a few
people should not use it. If you are in any doubt, talk to your doctor
or pharmacist.


Do not use this medicine…

If you have ever had a bad reaction to any of the ingredients.
If you are pregnant or think you are pregnant.
If any of these apply to you, get advice from a doctor or pharmacist
without using Ovex Suspension.


If you are pregnant or breast-feeding
Do not take this medicine if you are pregnant, or think you might
be pregnant. Ask your doctor or pharmacist for advice before
taking this medicine if you are breast-feeding.


Special warnings about this medicine
Since threadworms can spread very easily, it is strongly
recommended that all the family (except pregnant, breast-feeding
women or children under 2 years) are treated at the same time
and that suitable hygiene precautions are followed to prevent
re-infection (see Section 7 of this leaflet for more advice).


Some of the ingredients can cause problems
This medicine contains sucrose. If you have been told by your
doctor that you have an intolerance to some sugars contact
your doctor before taking this medicinal product.
■ Methyl (E218) and propyl (E216) parahydroxybenzoate may
cause allergic reactions which could possibly be delayed.

3 How to take this medicine
Check the table below to see how much medicine to take.
■ Always shake the bottle thoroughly before use.
■ The suspension should be taken using the 5 ml measuring cup in the
■ For oral use only.
■ Do not use more than the stated dose shown in the table.
■ Always supervise a child if they are taking this medicine.



Talk to your doctor or pharmacist...

Children under 2 years old
Do not give to children under 2 years old.

Adults and children aged 2 years and over



Adults and children
aged 2 years and over.

Take one 5 ml dose
per family member.

If symptoms do not disappear within a few days, speak to your doctor.
If you are re-infected your pharmacist may recommend that a
second dose is taken after 2 weeks.


If anyone takes too much
If anyone has taken too much Ovex Suspension, contact a doctor
or your nearest Accident & Emergency department (Casualty)
taking this leaflet and pack with you.

4 Possible side-effects
Ovex Suspension can have side-effects, like all medicines, although
these don’t affect everyone and are usually mild.

If you experience any of the following, stop using the
medicine and seek immediate medical help:
Rarely: (fewer than 1 in 1,000 people are affected)
■ Convulsions (seizures/fits).
■ Allergic reactions including unexplained wheezing, shortness of
breath, sudden swelling of your face or throat, and hives (also
known as ‘nettle rash’ or ‘urticaria’).
■ Skin rashes (which may be severe and include blistering or peeling of
the skin) and itching, and may be accompanied by a high temperature.

If you experience any of the following, stop using the
medicine and talk to your doctor or pharmacist:
Commonly: (fewer than 1 in 10 people are affected)
■ Stomach pain
Uncommonly: (fewer than 1 in 100 people are affected)
■ Stomach discomfort
■ Diarrhoea
■ Wind

Other effects that may occur include:
Rarely: (fewer than 1 in 1,000 people are affected)
■ Inflammation of the liver or abnormal liver function
■ Reduction in white blood cells (which reduces the body’s defences
against infection)
■ Unusual hair loss
■ Dizziness
If you experience any side-effects not included in this leaflet or are not
sure about anything, talk to your doctor or pharmacist.

5 Storing this medicine
Keep the product out of the reach and sight of children.
Do not use your medicine after the date shown as the expiry date on
the packaging.
Medicines should not be disposed of via wastewater or household
waste. Ask your pharmacist how to dispose of medicines no longer
required. These measures will help protect the environment.

What’s in this medicine?
The active ingredient in Ovex Suspension is: Mebendazole 100 mg
per 5 ml.
Other ingredients are: Sucrose, Microcrystalline cellulose and carmellose
sodium, Methylcellulose, Methylparahydroxybenzoate (E218),
Propylparahydroxybenzoate (E216), Sodium laurilsulfate, banana
flavour, citric acid monohydrate and purified water.

What the medicine looks like
Ovex Suspension is a banana flavoured liquid available in 30 ml
packs (6 single doses).
Product Licence holder:
McNeil Products Ltd, Maidenhead, Berkshire. SL6 3UG, UK.
Janssen Pharmaceutica NV, Turnhoutseweg 30, B-2340 Beerse,
This leaflet was revised April 2011.
Ovex is a registered trade mark.

What are threadwor ms?
Threadworms (Enterobius vermicularis) are tiny white parasitic worms that
live in the bowel. They are approximately half an inch long and resemble
threads of white cotton – hence the name threadworms.

How common are threadworms?
Threadworms are extremely common, especially in children. It is
estimated that up to 40% of children under ten years in the UK may
be affected at any one time. Once a child has threadworms, it is very
easy for the rest of the family to get them.

How do they spread?
Threadworms spread by producing large numbers of tiny eggs.
These eggs are so small that they cannot be seen with the naked eye.
When swallowed, the eggs pass into the bowel where they hatch
into worms. When mature, the female threadworm lays her eggs at
night around the anal area, which causes an “itchy bottom”. The
resulting irritation can cause intense scratching, which may lead to
further infections if the skin becomes sore or broken. Scratching also
allows transfer of the eggs to the fingers and nails. Eggs can then
be easily transferred to the mouth by finger sucking or nail biting,
causing re-infection, and spread to other members of the family by
direct contact or via food, towels and bed linen etc. Threadworm
eggs are present in house dust; they stick to clothing, carpets, towels
and bed linen; they can also be picked up in garden soil, or on
unwashed vegetables and salads. Because the eggs are so small and
so widespread, it is very easy for them to be swallowed.

Lifecycle of threadworms
2 - 6 weeks.
1. Scratching the bottom transfers eggs to fingers and
from there back to the mouth or to others either by
direct contact or via food, bed linen etc.
2. Eggs swallowed.
3. Female worms migrate to the anal area to lay
eggs at night.

Are they harmful?
Threadworms do not cause serious damage but they are an irritating
problem. Besides the intense itching, which can be distressing and
embarrassing for the sufferer, they can also lead to disturbed sleep,
tummy aches, irritable crying, loss of appetite or an unusually
large appetite. Sometimes, threadworms can be transferred to the
vagina and urinary passage. This can result in vaginal irritation and
discharge, symptoms of cystitis or bed wetting.

Who gets threadworms?
Anyone, although they are more common in children. It does
not mean that your family or your home are not clean. Because
threadworms are passed on very easily it is a wise precaution to treat
everyone in the family at the same time.

How can you tell if someone has threadworms?
The most obvious sign of threadworms is intense itching in the anal
area, especially at night, although this does not affect everyone. If
your children frequently scratch their bottoms, suffer from disturbed
sleep or become irritable, it is worth checking their motions and the
anal area for tiny white threads. If one member of the family has
threadworms, the rest of the family may already have picked up the
infection, even if they do not have obvious symptoms.

Important note
Threadworms only affect humans, they do not affect pets.

General advice
To ensure that you and your family do not infect others or re-infect
yourselves, you should also follow the hygiene measures listed below
for at least six weeks:
■ Keep nails short.
■ Discourage nail biting or finger sucking.
■ Wear pyjamas or underclothes in bed.
■ In the mornings, wash thoroughly around the bottom.
■ Provide a towel for the exclusive use of
each member of the household.
■ Change clothes regularly.
■ Regularly wash and iron bed linen.
■ Thoroughly wash hands and nails after
using the toilet and before each meal.

Do you need to keep your children off school?
No. As long as the children are treated and the general hygiene
measures outlined above are followed, there is no reason to keep
them off school.

How can you stop the problem coming back?
Threadworms are easily treated but unless the following precautions
are taken the problem may recur:
■ Follow the general advice above.
■ Make sure everyone in the family is treated at the same time.

GB - 981998


6 Further information

7 Further advice regarding threadworms

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Source: Medicines and Healthcare Products Regulatory Agency

Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.