Nitazoxanide is a broad-spectrum antiparasitic drug that inhibits the pyruvate-ferredoxin oxidoreductase pathway in protozoans and bacteria, preventing anaerobic metabolism. It is better tolerated than metronidazole and its metabolites lack mutagenic effects. After oral administration, nitazoxanide is rapidly hydrolyzed to its active metabolite tizoxanide, which undergoes conjugation and is excreted in urine, bile, and feces. Common minor adverse effects include nausea, vomiting, diarrhea, and abdominal pain. Nitazoxanide shows activity against various parasites and is used to treat Giardia intestinalis infection and diarrhea caused by