Nitazoxanide 200 mg is an antiparasitic and antiviral medication primarily used to treat diarrheal infections caused by Cryptosporidium and Giardia in children and adults. It is effective against protozoal, bacterial, and viral infections, making it useful for intestinal infections. Additionally, it has shown potential in treating viral gastroenteritis and certain respiratory viral infections. Nitazoxanide works by blocking energy metabolism in parasites, preventing their growth and reproduction. It is generally well-tolerated, with mild side effects such as nausea or headache. Due to its broad-spectrum action, it is being researched for use in other infectious diseases, including some viral infections.