Is Nitazoxanide an Antibiotic? What is Nitazoxanide? Nitazoxanide is a broad-spectrum antiviral and antiparasitic medication. Initially developed to treat protozoal infections, it has gained attention for its potential antiviral properties. Discovered in the 1990s, Nitazoxanide 500 is now used in various countries to treat infections like cryptosporidiosis and giardiasis. It is known for its ability …