Pentasodium colistinmethanesulfonate;contains the pentasodium salt of the penta(methanesulfonic acid) derivative of colistin A as the major component, with a small proportion of the pentasodium salt of the same derivative of colistin B; an effective antibiotic against most Gram-negative bacilli (except Proteus), given intramuscularly.
See: colistin sulfate, polymyxin.
Synonym: cholistine sulphomethate sodium, colistin sulfomethate sodium.