<b><a href="https://www.dozepharmacy.com/product/nizonide-500mg-tablet-nitazoxanide/">nitazoxanide 500 Mg</a></b> is used to treat diarrhea in adults and children older than 1 year of age caused by the protozoa Cryptosporidium or Giardia. Protozoa are suspected as the cause when diarrhea lasts more than 7 days. Nitazoxanide is in a class of medications called antiprotozoal agents.