Moxifloxacin Hydrochloride: A Fluoroquinolone Antibacterial with a Methoxy Group in the C-8 Position
Moxifloxacin hydrochloride (BAY 12-8039) is a synthetic fluoroquinolone antibacterial agent with
in vitro activity against a wide range of Gram-positive and Gram-negative bacteria. The bactericidal action of moxifloxacin results from inhibition of the topoisomerase II (DNA gyrase) in Gram-negative bacteria and topoisomerase IV in Gram-positive bacteria required for bacterial DNA replication, transcription, repair, and recombination. It is reported that the C8-methoxy moiety contributes to enhanced activity and lower selection of resistant mutants of Gram-positive bacteria compared to the C8-H moiety. Therefore, moxifloxacin has improved activity against Gram-positive species (including
staphylococci,
streptococci,
enterococci) compared with ciprofloxacin [
C2510,
C2227 (HCl salt)]. Recently, antituberculosis activity of moxifloxacin has been reported. (The product is for research purpose only.)