Nitazoxanide 500 mg is a generic antiprotozoal and antiparasitic medication used to treat diarrhea caused by certain intestinal infections, such as Giardia lamblia and Cryptosporidium parvum. This tablet works by inhibiting energy production in the parasite, effectively clearing the infection from the body. Commonly prescribed for both adults and children, nitazoxanide 500mg is taken orally, usually with food, to enhance absorption and reduce stomach upset. Side effects may include mild nausea, headache, and abdominal pain. Nitazoxanide is generally well-tolerated, but it’s essential to complete the full course as prescribed, even if symptoms improve early, to prevent recurrence.