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MedicineOTCEssential

Mebendazole

A medicine (Ovex, Vermox) used to treat worm infections.

Clinical information

Common uses

  • threadworms (pinworms)
  • roundworms
  • whipworms
  • hookworms

Common side effects

  • stomach pain or discomfort
  • farting
  • diarrhoea

Cautions

  • treat everyone in the household at the same time
  • rare serious effects: seizures, liver or blood problems
  • children under 2 only if a doctor prescribes it

Interactions

  • metronidazole (antibiotic)
  • cimetidine (stomach acid medicine)

Pregnancy: can be used if benefits outweigh risks — hygiene measures tried first

Reference information, not medical advice — always follow your doctor or pharmacist. Source: NHS Medicines A–Z, nhs.uk/medicines/mebendazole (accessed 2026-08-16)

Approved brands & formulations6

Brand nameDosage formStrengthImporterCategory
HelmintolTablet100 mgauthorized medicine importersOTC
MebendazoleTablet100 mg—OTC
MebexTablet100 mgauthorized medicine importersOTC
MebexOral Liquid100 mg/ 5 mlauthorized medicine importersOTC
MebozTablet100 mgauthorized medicine importersOTC
VermoxOral liquid ( Suspension )100mg/5mlauthorized medicine importersOTC
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