Nitazoxanide is an antiparasitic and antiviral medication used to treat various infections caused by parasites and certain viruses. It works by disrupting the energy metabolism of the pathogens, effectively inhibiting their growth and replication. This medication is commonly prescribed for conditions like giardiasis and cryptosporidiosis, which are intestinal infections caused by parasites. Additionally, it has shown potential against some viral infections, including influenza. Nitazoxanide is typically taken orally and is available in tablet and liquid forms.