Please consult your physician before taking any medication. How does Diodoquin work for me? Iodoquinol belongs to the group of medicines known as antiprotozoals. These medications are used to treat infections caused by one-celled animals known as protozoa. Iodoquinol is used most often for treatment of a condition known as amoebiasis. This infection often has no symptoms except the passage of cysts (a form of the amoeba) in the stool. Some cases of amoebiasis are associated with diarrhea or constipation, flatulence, and cramping abdominal pain. The stools sometimes contain mucus and blood. Relief from the symptoms of amoebiasis usually begins within a week or so of therapy. Diodoquin may also be used for purposes other than those listed in this medication guide.