ronidazole ronidazole ronidazole is an antiprotozoal agent used in veterinary medicine for the treatment of histomoniasis and swine dysentery as well as trichomonas gallinae, hexamitosis, giardia, and cochlosoma in all aviary birds and pigeons. it may also have use for the treatment of tritrichomonas foetus infection in cats and for the treatment of clostridioides difficile infection in humans. not to be confused with ornidazole. ronidazole names preferred iupac name (1-methyl-5-nitro-1h-imidazol-2-yl)methyl carbamate identifiers cas number 7681-76-7 y 3d model (jsmol) interactive image chembl chembl290299 chemspider 4915 echa infocard 100.028.796 pubchem cid 5094 unii e01r4m1063 comptox dashboard (epa) dtxsid6045400 inchi inchi=1s/c6h8n4o4/c1-9-4(3-14-6(7)11)8-2-5(9)10(12)13/h2h,3h2,1h3,(h2,7,11) smiles o=c(occ1ncc(n1c)()=o)n properties chemical formula c6h8n4o4 molar mass 200.154 g·mol−1 pharmacology atcvet code qp51aa08 (who) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references