Nitazoxanide is an antiparasitic and broad-spectrum antiviral medication used to treat various infections caused by parasites and certain viruses. It works by interfering with the energy metabolism of pathogens, thereby inhibiting their ability to replicate and survive. The nitazoxanide tablets are particularly effective against parasites like Giardia lamblia and Cryptosporidium parvum, commonly causing diarrhea in humans. Additionally, it has shown promise in treating viral infections such as influenza and COVID-19, though more research is needed to confirm its efficacy in these areas. The medication is generally well-tolerated, with mild side effects like nausea and headache reported occasionally. Always consult a healthcare provider for proper diagnosis and treatment.