VHOSPITAL.CLINIC · Antiparasitic Treatment

Albendazole for Ascariasis

Single-dose albendazole 400 mg is the WHO-recommended first-line treatment for ascariasis, achieving >95% cure rates against intestinal Ascaris lumbricoides.

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How Albendazole Treats Ascariasis

Albendazole sulphoxide inhibits nematode β-tubulin, disrupting microtubule polymerisation. Ascaris worms lose motility, glucose transport ceases, and the parasite dies and is expelled in stool within 24–48 hours.

Clinical Dosing

Adults and children over 2 years: 400 mg single dose. Children 12–23 months: 200 mg single dose. Take with food. No repeat dose required for simple intestinal ascariasis.

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

Side Effects

  • Single dose: minimal — transient nausea, abdominal discomfort
  • Rare: passing worms in stool for 1–3 days post-treatment (expected and non-concerning)
  • Elevated liver enzymes with prolonged dosing
Full side effects guide →

When to Seek Urgent Care

  • ⚠️Intestinal obstruction signs: severe pain, distension, vomiting
  • ⚠️Biliary colic (worms migrating to bile duct)
  • ⚠️Cough with blood (larval migration phase)
  • ⚠️High worm burden causing malnutrition in children

FAQ: Albendazole for Ascariasis

Is it normal to pass worms after albendazole treatment?

Yes. As albendazole paralyses Ascaris worms, they are expelled in stool within 24–72 hours after treatment. Passing live or dead worms is expected and confirms treatment is working.

Does a single dose of albendazole cure ascariasis completely?

For simple intestinal ascariasis, a single 400 mg dose achieves 95%+ egg reduction rates and 85–90% cure rates. In areas of high reinfection, periodic mass drug administration every 6 months is recommended.

Can albendazole treat ascariasis in pregnant women?

Albendazole is generally avoided in the first trimester. The WHO recommends treatment from the second trimester in endemic areas where the risk of heavy worm burden outweighs risk to the foetus.

Alternative Treatments for Ascariasis

Symptoms Albendazole Helps Resolve

By treating Ascariasis, Albendazole addresses these associated symptoms:

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Medical References

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