Nizonide 500mg Tablet is an antiparasitic medication used to treat parasitic worm infections, including giardiasis and cryptosporidiosis. Nizonide contains nitazoxanide, which works by interfering with the energy production of parasites, ultimately eliminating them from the body. Doctors commonly prescribe nizonide for diarrhea caused by protozoal infections. It is essential to take Nizonide as directed by a healthcare professional to ensure effectiveness. The tablet is usually taken with food to improve absorption. Side effects of Nizonide may include nausea, vomiting, or abdominal pain. Consult your doctor before using Nizonide, especially if you have liver or kidney issues.