<p data-pm-slice="1 1 []">Nitazoxanide Nizonide 500 is an antiparasitic medicine commonly used to treat certain intestinal infections caused by parasites, including giardiasis and cryptosporidiosis. It contains nitazoxanide as the active ingredient and works by interfering with energy production in susceptible parasites, helping clear the infection. Nizonide 500 is generally taken with food to improve absorption, while the dose and treatment duration depend on the infection and the patient&rsquo;s age and medical condition. Common side effects may include nausea, stomach discomfort, headache, or changes in urine color. Use nitazoxanide only as directed by a healthcare professional, and follow the prescribed dosage carefully for safe and effective treatment.