VHOSPITAL.CLINIC · Antiparasitic Treatment

Mebendazole for Enterobiasis (Pinworm Infection)

Mebendazole is highly effective for enterobiasis (pinworm infection), with a single 100 mg dose achieving >90% eradication of Enterobius vermicularis.

AntiparasiticMebendazole Full Drug Profile →Condition-first view →

How Mebendazole Treats Enterobiasis (Pinworm Infection)

Mebendazole binds selectively to β-tubulin in parasitic nematodes, preventing polymerisation into microtubules. This blocks glucose uptake and disrupts cellular transport in the worm, causing death from energy depletion.

Clinical Dosing

Single dose of 100 mg, repeated after 2 weeks. Treat all household members simultaneously. Chewable tablet can be chewed or swallowed. Not significantly absorbed — acts locally in the gut.

This is a general reference. Always follow your physician's prescription and current treatment guidelines.

Side Effects

  • Generally very well tolerated (minimal systemic absorption)
  • Transient abdominal pain and diarrhoea at high doses
  • Rare: liver enzyme elevation with prolonged use
Full side effects guide →

When to Seek Urgent Care

  • ⚠️Persistent symptoms after two treatment courses
  • ⚠️Signs of ectopic infection (pelvic pain in girls)
  • ⚠️Visible worms in unexpected locations

FAQ: Mebendazole for Enterobiasis (Pinworm Infection)

Why is a second dose needed 2 weeks after mebendazole?

Mebendazole kills adult worms but not eggs. Pinworm eggs hatch within 2 weeks. The repeat dose at day 14 eliminates the next generation before they can reproduce, breaking the reinfection cycle.

Should the whole family be treated?

Yes. WHO guidelines recommend simultaneous treatment of all household members regardless of symptoms. Enterobius eggs survive on surfaces for up to 3 weeks and are easily transmitted within households.

Is mebendazole safe in pregnancy?

Mebendazole is not recommended in the first trimester. In the second and third trimester, single-dose treatment is generally considered acceptable when the risk of infection outweighs the theoretical risk to the foetus.

Alternative Treatments for Enterobiasis (Pinworm Infection)

Symptoms Mebendazole Helps Resolve

By treating Enterobiasis (Pinworm Infection), Mebendazole addresses these associated symptoms:

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Medical References

Content on this page is informed by evidence-based clinical sources including: