Nizonide 500 Tablet contains nitazoxanide, an antiparasitic and antiprotozoal medicine commonly used to treat certain intestinal infections caused by parasites such as Giardia and Cryptosporidium. It works by interfering with energy-producing processes in susceptible organisms, helping clear the infection. The tablet should be taken only as directed by a qualified healthcare professional, with the dose and treatment duration depending on the infection and individual factors. Common side effects may include nausea, abdominal discomfort, headache, or changes in urine color. Before using Nizonide 500, inform your doctor about other medicines, allergies, pregnancy, or existing medical conditions. Avoid self-medication and follow the prescribed course carefully.