Which of these would be the most effective at destroying Giardia, a protozoan that infects the intestinal tract?

Giardia is a protozoan parasite, so the most effective treatment is a medicine that targets parasites. An antiparasitic is designed to destroy or inhibit parasites, making it the correct choice. Anti-inflammatories, pain relievers, and antihistamines may ease some symptoms but do not eliminate Giardia.

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