Albendazole for treatment of giardiasis

Albendazole (Albenza) comes in tablet form and is available only by prescription. Albendazole has shown effectiveness rates of 35% to 96% for the treatment of giardiasis, depending on the dosage.1

Side effects are not common but may include:

  • Fever.
  • Rash or itching.
  • Sore throat.
  • Unusual tiredness or weakness (with high doses).
  • Dizziness or headache.
  • Belly pain, diarrhea, nausea, or vomiting.

Albendazole should not be taken by pregnant women or those with liver function problems. It is best to take albendazole with food.


  1. Escobedo AA, Cimerman S (2007). Giardiasis: A pharmacotherapy review. Expert Opinion in Pharmacotherapy, 8(12): 1885–1902.

Last Updated: September 27, 2009

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