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Mebendazol

Vermox, Ovex

Carefully read and follow the directions from the pack.

Everyone in your family should be treated on the same day.

Side-effects are uncommon but may include tummy (abdominal) pain and diarrhoea.

Follow the few simple hygiene rules that will help prevent re-infection. Most importantly, wash your hands and scrub your nails after visiting the toilet and before eating meals.

Överblick

  • Mebendazole is a medicine used to treat roundworm infections, especially threadworms.

  • It comes as an oral liquid or chewable tablets and can be bought without a prescription.

  • Mebendazole works by stopping worms from absorbing sugars they need to live.

  • Take a second dose 14 days later to kill any newly hatched worms.

  • Good hygiene is important to prevent re-infection as the medicine does not kill eggs.

  • Common side-effects include tummy discomfort, diarrhoea, and wind.

  • Do not use for children under 2 years old without a doctor's advice.

About mebendazole

Typ av medicin

Anthelmintic

Används för

Treatment of roundworms (particularly threadworms) in adults and in children over 2 years of age

Även kallad

Vermox®; Ovex®

Tillgänglig som

Oral liquid medicine and chewable tablets

Spolmaskar are worms with a long, round (tubular) body. They are parasites of humans, which means that they can live in our bodies. Springmask, hookworms and whipworms are all types of roundworm.

Threadworms are a relatively common type of roundworm and can be easily passed from one person to another, but they do not usually cause serious problems. They live inside the bowel for a short time - adult threadworms do not live for longer than six weeks. The female worm lays her eggs at night around an infected person's back passage. This causes irritation and an 'itchy bottom'. If the person then scratches the area it allows the tiny eggs to get under the fingernails. If the fingers are then put in the mouth - for example, during sleep - the eggs may be swallowed. The worms then develop in the gut and produce more eggs. Eggs can easily get on to bedding, carpets and towels, and into house dust. They can also get on to food and be swallowed. All this creates a cycle of re-infection.

Other types of roundworm eggs live in the soil in tropical countries. They most commonly get into the body when a person gets them on his or her hands and then transfers them to their mouth. This can lead to a cycle of infection, and any food which is handled can become contaminated. Roundworm infections can be a problem for people living in, or travelling to, a tropical country, and for those who eat contaminated food.

Mebendazole works by preventing the worms from absorbing sugars which they need to survive. This kills the worm within a few days. Although mebendazole kills adult worms, it does not kill the eggs. Because of this it is important to break the cycle of re-infection. This can be done by treating everyone living in your house at the same time (even if they do not have any symptoms), and by following the advice given in the section below called 'Getting the most from your treatment', to prevent re-infection.

Mebendazole is available on prescription. You can also buy it without a prescription in pharmacies.

Before taking mebendazole

To make sure this is the right treatment for you or your child, before taking mebendazole it is important that your doctor or pharmacist knows:

  • Om du är gravid eller ammar.

  • If you have a baby or young child in the family. You cannot buy mebendazole for use in children under 2 years old - you will need advice from a doctor.

  • Om du tar några andra läkemedel. Detta inkluderar alla läkemedel du tar som finns att köpa utan recept, samt växtbaserade och komplementära läkemedel.

  • Om du någonsin har haft en allergisk reaktion mot en medicin.

How to take mebendazole

  • Before you start this treatment, read the manufacturer's printed information leaflet from inside your pack. The manufacturer's leaflet will give you more information about mebendazole and a full list of the side-effects which you may experience from taking it.

  • Follow the dosage instructions carefully and make sure all members of your family are treated on the same day, even if they do not appear to be infected.

  • In the UK the most common worm infection is threadworm - this is a type of roundworm and is sometimes referred to as a pinworm. For threadworm infections, you will need to take one dose of 100 mg (one tablet or 5 ml of liquid medicine).

  • It is highly recommended to take a second 100 mg dose 14 days later to kill any worms that have hatched since the last treatment. This is especially important if you suspect you (or your child) may have become re-infected.

  • Your dose will be different to this if you are prescribed mebendazole for any other type of roundworm infection.

  • Mebendazole can be taken before or after food. The tablets can be chewed, crushed, or swallowed whole.

Få ut det mesta av din behandling

Mebendazole removes roundworms, but not their eggs. Therefore, it is also important to break the cycle of re-infection which can occur - this can be done by following a few simple hygiene measures to prevent you from swallowing eggs, causing a new infection:

  • Wash your hands and scrub your nails with a nailbrush after every visit to the toilet, and before preparing or eating a meal.

  • Wear underwear or pyjamas in bed.

  • Have a bath or shower, immediately after waking up in the morning, to wash away any eggs that have been laid during the night.

  • Disinfect your toilet seat and toilet handle, and the handle on your toilet door, regularly.

  • Vacuum the carpets in your bedrooms every day, and wet-wipe the surfaces of your bedroom furniture.

  • Keep your fingernails short and clean, and avoid biting your nails or sucking your fingers.

  • Have a separate towel for each member of your family to use.

  • Change and wash your clothing and bedding frequently.

Can mebendazole cause problems?

Along with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains some of the ones associated with mebendazole. You will find a full list in the manufacturer's information leaflet supplied with your medicine.

Mebendazole side-effects

Vad kan jag göra om jag upplever detta?

Tummy (abdominal) discomfort, diarrhoea, wind

If troublesome, speak with your doctor or pharmacist

Om du upplever några andra symtom som du tror kan bero på denna medicin, tala med din läkare eller apotekare.

How to store mebendazole

  • Förvara alla läkemedel utom räckhåll och synhåll för barn.

  • Förvara på en sval, torr plats, borta från direkt värme och ljus.

Viktig information om alla läkemedel

Viktig information om alla läkemedel

Om du köper några mediciner, kontrollera med en apotekare att de är säkra att ta tillsammans med dina andra mediciner.

Ta aldrig mer än den föreskrivna dosen. Om du misstänker att du eller någon annan kan ha tagit en överdos av denna medicin, gå till akutmottagningen på ditt lokala sjukhus. Ta med behållaren, även om den är tom.

Om du ska genomgå en operation eller tandbehandling, informera den som utför behandlingen om vilka mediciner du tar.

Denna medicin är för dig. Ge den aldrig till andra människor även om deras tillstånd verkar vara detsamma som ditt.

Behåll inte föråldrade eller oönskade mediciner. Ta dem till ditt lokala apotek som kommer att ta hand om dem åt dig.

Om du har några frågor om denna medicin, fråga din apotekare.

Rapportera biverkningar av ett läkemedel eller vaccin

Om du upplever biverkningar kan du rapportera dem online via Yellow Card webbplats.

symptomkontroll

Osäker på att blanda mediciner?

Kontrollera möjliga interaktioner mellan läkemedel, kosttillskott och livsmedel innan du tar dem tillsammans.

Vanliga frågor

How long does mebendazole take to start working?

Mebendazole works by stopping the worms from absorbing sugars they need to survive, which typically kills the threadworm within a few days of taking the medication.

Does mebendazole kill other types of worms besides threadworms?

Yes, mebendazole is an anthelmintic medicine used for the treatment of roundworms. This includes various types such as threadworms, hookworms, and whipworms. However, threadworm (pinworm) is the most common infection in the UK, and the typical single-dose treatment described is specifically for this. Other roundworm infections may require a different dosage, which would be prescribed by a doctor.

What happens if I forget to take the second dose of mebendazole after 14 days?

The second dose of mebendazole, recommended 14 days after the first, is crucial because the initial dose only kills adult worms and not their eggs. This second dose targets any new worms that may have hatched since the first treatment, helping to break the cycle of re-infection. If you miss this dose, you risk the possibility of re-infection and the worms developing again.

Is it safe to use mebendazole if I am pregnant or breastfeeding?

If you are pregnant or breastfeeding, it is important to inform your doctor or pharmacist before taking mebendazole, as this information is crucial for them to ensure it is the right treatment for you.

Where do threadworms come from, and how do they spread?

Threadworms live inside the bowel and lay their eggs around an infected person's back passage, causing an 'itchy bottom'. When the person scratches, the eggs get under their fingernails. If these fingers then go into the mouth, the eggs can be swallowed, leading to new worms developing in the gut. Eggs can also spread to bedding, carpets, towels, house dust, and even food, creating a cycle of re-infection.

Vidare läsning och referenser

Om författarenVisa fullständig biografi

Författarbild

Michael Stewart, MRPharmS

Ansvarig för granskning av medicinbroschyrer – Konsult, Apotekare

BPharm (Hons), MRPharmS

Michael är en apotekare som arbetar i Midlands och South Yorkshire med mer än 20 års erfarenhet av att ge råd om läkemedel och medicinska tillstånd. Han har en stark bakgrund inom vårdutbildning och har producerat och levererat utbildningskurser för apoteksteam och personal inom vårdboenden, inklusive sjuksköterskor. Han har också bidragit till apoteksrådgivande styrelser för hantering av mindre allvarliga tillstånd i samhället.

Om recensenten

Författarbild

Sid Dajani

Sultan Dajani tog examen vid London School of Pharmacy 1994 och blev den yngsta valda medlemmen i Royal Pharmaceutical Society-rådet sedan dess grundande 1842.

Artikelhistorik

Informationen på denna sida är skriven och granskad av kvalificerade kliniker.

  • Next review due: 25 Sept 2027
  • 26 Mar 2023 | Senaste versionen

    Senast uppdaterad av

    Michael Stewart, MRPharmS

    Granskad av

    Sid Dajani
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