Nitazoxanide is used to treat diarrhea in adults and children caused by the protozoa Giardia
lamblia. Nitazoxanide is also used to treat diarrhea caused by the protozoa Cryptosporidium parvum.
These conditions are also sometimes referred to as travelers' diarrhea.
Nitazoxanide may also be used for purposes other than those listed in this medication guide.