We use website cookies to ensure that you receive the best experience. If you're happy and would like to carry on browsing click 'Accept', or find out more about our Cookie Policy. Accept

Ovex Tablets

Ovex Tablets & Suspension

Select Treatment

Select Quantity

Select Quantity

Order before 3pm for delivery from Fri. 18 Jun and Mon. 21 Jun.

Buy Ovex Online

Ovex Tablets & Suspension are effective anti-worm treatments that are suitable for the whole family. Ovex prevents the growth and reproduction of threadworms or pinworms in the gut. 

Ovex is available to buy from The Independent Pharmacy as either a banana flavoured suspension or as a family pack of 4 tablets, all you need to do is complete our quick online consultation to check that Ovex is the best medication for you.

Ovex Information

  • Age: N/A

    Maximum per order: N/A

  • Pregnancy: Not suitable

    Breastfeeding: Not suitable

What is Ovex?

Ovex is a brand of medicine used to treat threadworms which contains the active ingredient Mebendazole. Mebendazole is an anthelmintic or anti-worm medication. Ovex tablets and suspension should only be taken orally.

Mebendazole is most commonly used to treat threadworms, however it is also sometimes used to treat other worm infections such as; whipworm, roundworm and hookworm. 


What is Ovex used for?

Ovex can be bought over-the-counter without a prescription to effectively treat worm infections in the gut for those over the age of 2 years. For children under the age of 2 years who have suspected worm infections, they will need a prescription from their doctor before using Ovex. 


What are threadworms?

Threadworms are tiny white parasitic worms that when swallowed live and lay eggs in the bowel.

Threadworms are most commonly found in children but someone of any age can catch them. It is predicted that around 40% of children under 10 years old in the UK are likely to be infected at one time.

Mature threadworms lay their eggs at night around the anal area, which causes the most common symptom of threadworms that is itching around the anus. 

The scratching of the anus often leads to the transmission of threadworms as the eggs are then spread to the fingernails which can then be transferred onto household objects and then swallowed. 

Threadworm eggs are very tiny and are very easily transferred onto clothes, food, objects and therefore it is advised that if one member of the family is suspected to have a threadworm infection, then the whole family receives treatment even if they do not currently have any symptoms. It can take 2-6 weeks for symptoms to appear after the eggs are ingested.


How does Ovex work?

Mebendazole is part of a group of medicines known as anthelmintic or anti-worm. Mebendazole works by preventing the worms from being able to absorb the sugars from your body, which they need to survive. 

The worms rely on our bodies sugars for energy when the worms are therefore deprived of sugars they can no longer survive and will die. Within 3 days, the dead worms will normally be excreted in stools from the gut. 

It is important to note that Ovex is only effective at killing the adult worms and not the eggs. It is therefore important to practice the following good hygiene tips during and after Ovex treatment (at least 6 weeks) to avoid swallowing threadworm eggs again and becoming reinfected. 

  1. Keep nails short and avoid biting or sucking fingers 
  2. Wear pyjamas to bed
  3. Wash around the bottom thoroughly each morning
  4. Each household member should use a separate towel
  5. Change clothes and bedding regularly
  6. Thoroughly wash hands and nails after using the toilet and before each meal


How long does Ovex take to work?

Ovex should start to work after just one dose and starts working straight away, however, the treatment can take up to 3 days to successfully kill the mature worms and for them to be excreted in your stool.

Ovex does not kill the threadworm eggs so it is important to practise good personal hygiene for at least 6 weeks after you commence treatment to avoid re-infection to yourself and also to avoid infecting others. 

If you notice that yourself or someone else has become reinfected with threadworms it is important to speak to your doctor or pharmacist who may suggest taking another course of Ovex after 2 weeks.


How long does Ovex stay in your system?

Ovex starts to deprive the worms of sugars almost as soon as it is consumed but it can take up to 3 days for the mature dead worms to be excreted in the stool. 


How long does it take for threadworms to die after taking Ovex?

Ovex will start to deprive the threadworms of the sugars they need to survive almost straight away after consumption. It can, however, take up to 3 days for the mature worms to die and to be excreted in the stool. 


Ovex dosage

For information on the dosage of Ovex please see the Directions section.


Can you take too much Ovex?

Taking too much of any medication can be harmful and therefore you must read the Patient Information Leaflet thoroughly before starting your treatment. For more information about Ovex dosages please go to the Directions section.

Taking more Ovex than is advised may also increase your chances of experiencing unwanted side effects. For more information on side effects please see our Ovex Side Effects section. 

If you are worried about having taken too much Ovex or any unwanted side effects contact a doctor or pharmacist. 


Ovex side effects

The most common side effects people report when taking Ovex is stomach pain this may affect up to 1 in 10 people who receive treatment. For more information regarding side effects see our Ovex side effects section.


Ovex in pregnancy

Ovex is not suitable for people who are pregnant or breastfeeding. If you are concerned that you may have a worm infection and are pregnant or breastfeeding, speak to your doctor or pharmacist for advice.



*Prescription medicines are supplied subject to a medical consultation at the discretion of a doctor.

Ovex dosage

Ovex can be purchased as either a banana flavour suspension or as a tablet from The Independent Pharmacy. 

Ovex Suspension and Tablets are for oral use only. 

Ovex Suspension: Adults and children over 2 years of age take one 5ml dose.

Ovex Tablets: Adults and children over 2 years of age chew or swallow 1 tablet with a whole drink. 

Each household member should also take the same single dose even if they are not currently experiencing symptoms. 

Do not take both tablets and suspension at the same time as this will count as a double dose and is likely to increase chances of experiencing unwanted side effects. 

If symptoms return after your initial treatment, your doctor or pharmacist may advise you and all your household members to take a second single dose after 2 weeks. 


Ovex double dose

Taking a double dose of Ovex is not likely to be harmful however it increases your chances of experiencing unwanted side effects. For more information please see the Ovex side effects section.

In some cases symptoms may return after an initial course of treatment, this is because Ovex does not kill the threadworm eggs and it is likely you have become re-infected.

If you think you may have been re-infected with threadworms, speak to a doctor or pharmacist who will likely advise taking a second single dose of Ovex 2 weeks after your initial treatment.

To reduce your chances of reinfection it is important to practice good personal hygiene for at least 6 weeks after treatment. For some top tips on personal hygiene when using Ovex, see our Description section.

Ovex side effects

Like with all medication it is possible to experience some side effects when being treated with Ovex. Not everyone will experience the same side-effects and some people may not be affected at all.

One in 10 people will report experiencing:

  • Stomach pain

One in 100 people will report also experiencing:

  • Diarrhoea 
  • Wind

If you experience side effects you should stop taking this medication and speak to your doctor or pharmacist.

For the full list of possible side effects see the Patient Information Leaflet. It is essential when purchasing Ovex that you read this leaflet thoroughly. 


Ovex - worms still moving

It can take up to 3 days for Ovex to kill mature threadworms and for them to be excreted in your stool. 

If you continue to notice active worms in your stool a week after taking Ovex you should speak to a doctor or pharmacist as they may advise you to take a second dose after 2 weeks.

Ovex Ingredients

Ovex suspension contains the active ingredient Mebendazole (100mg per 5 ml). 

Ovex tablets contain 100mg of Mebendazole per tablet.

For further information on the full list of inactive ingredients including allergen information please ensure you have read the Patient Information Leaflet thoroughly. 

Ovex warnings

Ovex should not be taken at the same time as the antibiotic Metronidazole, as this can cause serious skin reactions.

Ovex and driving

Ovex should not affect your ability to drive or operate heavy machinery. If you are concerned about your ability to drive while taking this medication speak to a doctor or pharmacist. 

Ovex in pregnancy and breastfeeding

Ovex is not suitable for the treatment of worms in those that are pregnant or breastfeeding. Speak to your doctor or pharmacist for advice if you believe you have worms or a household member currently has symptoms.

Please be aware this is not an exhaustive list of Warnings. For full details on Warnings and Precautions surrounding the administration of Ovex, please read the Patient Information Leaflet.

Delivery & Shipping Information

Please note that due to the current situation with COVID-19, Royal Mail are experiencing some delays. This may mean that your order takes longer to arrive than you would normally expect. We are working hard to ensure that, where possible, all orders placed before 15:00 are still dispatched the same working day.


UK Orders

We offer FREE standard tracked delivery on orders over £40.

The following delivery options are available:

  • Standard Tracked Delivery - 2 - 3 day delivery - £2.95
  • Express Tracked Delivery - 1 - 2 day delivery - £4.45
  • DPD Next Day - 1 - 2 working days - £6.95
  • Special Delivery (Guaranteed before 21:00) - £8.95
  • Saturday Guaranteed before 21:00 - £10.45

Important Delivery Information

All our orders are sent out using Royal Mail (unless stated). We always aim to dispatch all Royal Mail & DPD orders received before 15:00 the same working day. Any orders received after 15:00 or over the weekend will be dispatched the next working day. Orders will not be dispatched on weekends or bank holidays.

All orders are subject to approval by our team of doctors and pharmacists. Your delivery date in the checkout is subject to your consultation being approved by our healthcare team.

All orders can be fully tracked from your dispatch email, in your online account and from any notifications from your courier.

We ensure all parcels are in plain packaging for discreet delivery of your medicines and pharmacy goods. Where possible, we will attempt to size all parcels to fit through your letterbox in tamper-proof packaging. By placing an order on our website, you confirm that it is safe and appropriate for a package containing medicines to be posted through your letterbox, if the carrier is able to do so. You should notify our customer support team if it is not safe for the package to be posted through the letterbox, for example due to animals or small children.

Deliveries containing pharmacy-only or prescription medicines may require a signature on receipt. 

Delivery is free for all NHS prescriptions.


Royal Mail


  • Fully tracked delivery
  • SMS & email notifications
  • Four-hour delivery window
  • Change delivery date directly with Royal Mail
  • Update delivery location - add a Safeplace, preferred neighbour, or update your delivery location to a local Post Office or Royal Mail Customer Service Point.

Royal Mail are the most widely recognised mail delivery company in the UK. Being on the UK’s 29 million doorsteps six days a week means they offer unparalleled price and convenience. The Independent Pharmacy uses Royal Mail’s Tracked 48, Tracked 24, and Special Delivery Guaranteed parcel services to offer reliable, fully-tracked delivery at very competitive prices. Your Royal Mail parcel will arrive with your normal daily delivery of post.

Please note: Royal Mail do not deliver on Sundays or Bank Holidays - this should be taken into account when ordering. 

If you are not home to accept your delivery, a card should be left by the Royal Mail representative. This card will provide details of where you can collect the order or how to arrange re-delivery.

Should you be unable to collect your missed delivery or arrange for your medication to be redelivered by Royal Mail, the pharmacy can resend your medication to the same, or a different address provided it has been returned to us and this happens within a 30 day window.

Once a package has been shipped with Royal Mail we advise that you are bound to the terms and conditions of their use together with the terms and conditions contained herein.

You have the right to cancel your order up to the point when your treatment is dispatched. The pharmacist must destroy any medication within 30 days of it being returned, even un-opened boxes, so we are not able to offer refunds once your treatment has been dispatched.




  • Fully tracked delivery
  • SMS & email notifications
  • One-hour delivery window
  • Change delivery date directly with DPD
  • Update delivery location - add a Safeplace, preferred neighbour, or update your delivery location to a local collection point.

DPD Local is the most innovative parcel carrier around. Thanks to their industry-leading Predict service, they provide parcel recipients with a one hour delivery window, notified by email, so you don't have to wait in all day. What's more, it enables receivers to watch the progress of their delivery on a real-time map, all the way down to a final 15 minute time-slot. 

As well as keeping customers informed at every stage of the journey, DPD believe in maximising choice and convenience. That's why DPD provide access to a suite of options both on the day of delivery and the night before, allowing customers to take delivery of their goods in a way that suits. If you wish to reschedule, you can:

  • Select an alternative delivery date
  • Opt for delivery to a nominated neighbour
  • Have the parcel left in a specified safe place
  • Collect the parcel from your local DPD Pickup Shop
  • Upgrade delivery to By 12

Please note: DPD do not deliver on Saturdays, Sundays or Bank Holidays - this should be taken into account when ordering. 

Once a package has been shipped with DPD we advise that you are bound to the terms and conditions of their use together with the terms and conditions contained herein.

You have the right to cancel your order up to the point when your treatment is dispatched. The pharmacist must destroy any medication within 30 days of it being returned, even un-opened boxes, so we are not able to offer refunds once your treatment has been dispatched.


Forwarding houses

We are unable to ship orders to mailing or forwarding houses for onwards shipping to locations outside of the UK.


BFPO Postcodes

Unfortunately we are unable to deliver medicines to BFPO postcodes.


Remote Areas

Please be aware that Royal Mail Guaranteed services are not available to all customers in the UK, especially those that live in remote postcodes. Royal Mail advise customers of the following:

We deliver by 17:30 the next working day in the following postcode areas:
AB30 - 39, 41 - 45, 51 - 56
GY9 Alderney (Channel Islands)
HS1, 3 - 9
IV21 - 28, 40 - 49, 51 - 56
KA27, 28
KW1 - 3, 5 - 15
KW16 Stromness Town only
PA20 (0&9)
PA28 - 38, 41 - 49, 76, 77
PH15, 17 - 26, 31 - 40, 49, 50


We deliver within two working days by 17:30 to the following postcodes areas:
GY1 Herm (Channel Islands)
GY9 Sark (Channel Islands)
PA60 - 75, 78
ZE2, 3


We deliver within three working days by 17:30 to the following postcode areas:
KW16 - non-Town
PH30, 41 - 44


Please note: This applies to our 'Special Delivery' and 'Saturday Guaranteed' services.


International Orders

We are currently unable to ship orders outside of the UK.

We are unable to ship orders to mailing or forwarding houses for onwards shipping to locations outside of the UK.

Need to know more about Threadworms?

Visit our advice area or contact our support team

Ovex Tablets & Suspension Reviews

Unsure about a treatment?
Ask our medical team for impartial information and advice about any treatment we provide or medical condition that we treat before you buy.

Frequently Asked Questions

  • My child is itching but I cannot see any worms, is it possible they’re infected?

    It is still possible that your child has threadworms. Sometimes they aren’t always visible, but a consistent itch around the bottom is a top sign of an infection. The itch itself is caused by a mucus that the threadworms discharge. 

  • How long after starting treatment should it take for the threadworms to disappear?

    Ovex Suspension contains mebendazole, which acts to starve the threadworms from the sugars that keep them alive. It will usually take a few days for the threadworms to die off. Immediate elimination is not possible so the symptoms may continue for a few days after taking the treatment.

  • My child is really itchy when they try to sleep, can I prevent this in any way?

    The only thing you can do to prevent the spread of eggs during the night is to get the child to wear cotton gloves while they sleep. These gloves should be washed daily to prevent the eggs from spreading.

  • One of my children has threadworms and the other is only a 1 year old, how can they both be treated?

    To ensure the entire household gets treated you will need to see your GP, who can assess and prescribe treatment for the child of 1 year. Children under 2 will require different treatment and medicines like Ovex will be unsuitable. The rest of the household can be treated using Ovex.

  • How has my child caught threadworms?

    Younger children often aren’t aware about the importance of good hygiene. This can result in them forgetting to wash their hands. Poor hygiene is a main cause of the spread of threadworms. Their eggs can be caught from contaminated surfaces, which have been touched by an infected child. This could include; school tables, toys and holding hands whilst playing.

  • Should my child go to school if they are infected?

    The Health Protection Agency suggests that infected children should still go to school. Schools and nurseries will have advice to follow regarding good hygiene, so you should let them know to ensure these measures are more vigilantly adhered to.

  • How do I take Ovex Suspension?

    Adults and children over the age of 2 years; one 5ml spoonful should be taken as a single dose. Ovex can be taken either with or after food. This product should be shaken well before use.

  • How do I take Ovex tablets?

    Anyone over the age of two years old should take one Ovex tablet, either with food or without, in order to treat the threadworm. The tablets can either be swallowed with water or chewed. For use on younger children they can also be crushed for ease.

    If using Ovex suspension then a small 5ml spoonful will act as a single dose. Shake well before using.

    Second dosages should only be taken two weeks later if the threadworm resurfaces.

  • So what exactly are threadworms?

    Threadworms, also known as Enterobius vermicularis, are a kind of parasitic worm that live and breed in the bowel of humans and some monkeys. The worms will grow to approximately half an inch long and look like small threads of cotton – which is where they get their name from.

  • Are threadworms common?

    Threadworms are quite common, and children are more likely to become infected. Some estimates have said that up to 40% of young children (under ten years old) will be infected with thread worm at some point. A child becoming afflicted with threadworm is usually the catalyst that helps the parasite spread to the rest of the family.

  • My child keeps scratching their rectal area, could they be infected with threadworm?

    Yes, this is a possibility. Threadworms are not always visible and itching might be a good indicator of an infection. The reason itching occurs is because of a kind of mucus that is secreted by the worms, and itching could lead to the entire family becoming infected. If in doubt, always consult your doctor or pharmacist

  • At what age can a child take Ovex?

    Ovex can be taken by anybody over two years old. For younger children you might want to crush the tablets up for easier use.


  • My child is infected with threadworm but is under 2 years old, what should I do?

    Because of the high chance that threadworms will be spread throughout the family, it is important to treat your children under 2 years old as well. To do this you should visit your doctor as special treatment will need to be administered.

Authored By:

A photo of Dr Donald Grant

Dr Donald Grant

MB ChB DRCOG MRCGP Dip.orth.med

Published on: 20-01-2017

Last modified on: 11-10-2020

Dr Don Grant is a GP with over 30 years experience and is the Clinical Advisor at The Independent Pharmacy

Reviewed By:

A photo of  Andy Boysan

Andy Boysan


Reviewed on: 11-10-2020

Next review date: 11-10-2022

Andy is a co-founder, the superintendent pharmacist and director at The Independent Pharmacy.

We are a trusted online pharmacy

We are regulated by a number of organisations in the UK including the MHRA, GPhC & CQC to ensure we offer the highest level of service to every one of our customers.

Rated Excellent based on over 16,000 reviews from Google, Trustpilot & Reviews.io
5 out of 5 stars
Excellent service, thank you! I feel so lucky to have found this pharmacy. I am getting my treatment without needing to go to a GP, as they have their own doctors who assess the symptoms.
5 out of 5 stars
Very safe and very quick delivery Because we are isolating this site has been so important to myself and family. Would highly recommend this site.
5 out of 5 stars
Very impressed Used for the very first time, very impressed with cost, variety of products and prompt delivery - well recommended.
5 out of 5 stars
Helpful and efficient I've used The Independent Pharmacy for over a year; they are professional, helpful and efficient.
5 out of 5 stars
Exactly as described and fast delivery Exactly as described and fast delivery
5 out of 5 stars
A brilliant and reliable company As usual the service is better than the last time, such a brilliant and reliable company who keep you updated throughout. Thank you for such a loyal and quick service.
5 out of 5 stars
Can recommend Found this a very convenient and useful source of comprehensive online medication. Answer a few questions then easy order procedure. Reasonable prices and delivery. Can recommend from personal experience.
5 out of 5 stars
Quick and professional Ordering and payment were professionally and quickly dealt with. Delivery was on time, and with the correct items well packed. Couldn't really ask for any better service than this!
5 out of 5 stars
Excellent service Excellent service, quick and easy to sort out, fast delivery
5 out of 5 stars
You passed with flying colours. I'll definitely recommend you You did absolutely fine! I've never ordered from an online pharmacy before because it's difficult to know which ones are legitimate, but all of your positive reviews made me take the risk, though I only ordered a single product, as a test.

Why choose The Independent Pharmacy?

How does it work?

It's easy! Follow our simple process to get the treatment or advice you need in no time.

  • 1 Complete a simple health questionnaire
  • 2 A healthcare professional reviews your answers
  • 3 You receive the right treatment or advice
  • 4 Easily re-order in a few clicks

Can't find what you're looking for?

If you can't find what you are you looking for, please contact our support team on 0333 2200 519 for help and advice.

Your basket

Your basket is empty

Start shopping

Did you know you can search from anywhere on the site? Simply press 's' on your keyboard and our quick search tool will appear.

Alternatively you can view a list of all of our treatments and treated conditions.

If you can't find what you are looking for, please contact our support team on 0333 2200 519.