Nizonide 500mg is a prescription medication primarily used to treat parasitic infections such as giardiasis and amoebiasis. Containing nitazoxanide as its active ingredient, Nizonide works by disrupting the energy metabolism of parasites, leading to their elimination. The usual safe dosage for adults is 500mg taken twice daily for 3 days, but this may vary based on the specific condition and individual health factors. Always take nizonide as directed by a healthcare professional to avoid side effects like nausea or abdominal pain. Consult a doctor before use, especially if pregnant or nursing, to ensure Nizonide's suitability for your condition.