Ornidazole is a C-nitro compound that is 5-nitroimidazole in which the hydrogens at positions 1 and 2 are replaced by 3-chloro-2-hydroxypropyl and methyl groups, respectively. It is used in the treatment of susceptible protozoal infections and for the treatment of anaerobic bacterial infections. It has a role as an antiamoebic agent, an antiinfective agent, an antiprotozoal drug, an antibacterial drug, an antitrichomonal drug and an epitope. It is a member of imidazoles, a secondary alcohol, a C-nitro compound and an organochlorine compound.