Metronidazole
The nitro-5-imidazole derivative has an antibacterial and antiprotozoal effect. It recovers 5-nitro group due to transport proteins of anaerobic bacteria and protozoan microorganisms. The restored 5-nitro group of metronidazole inhibits the synthesis of nucleic acids from the DNA of microorganism cells, which leads to their death.
Active with respect to Gardnerella vaginalis, Giardia lamblia, Entamoeba histolytica, Trichomonas vaginalis, as well as in relation to obligate anaerobes Bacteroides spp. (at t.h. B. distasonis, B. ovatus, B. fragilis, B. vulgatus, B. thetaiotaomicron), Fusobacterium spp., Prevotella spp. (Prevotella bivia, Prevotella buccae, Prevotella disiens), Veillonella spp., and some gram-positive microorganisms (Clostridium spp., Eubacterium spp., Peptococcus spp., Peptostreptococcus spp.).
With a mixed flora, it acts synergistically with antibiotics against aerobic bacteria.
Chlorhexidine
Antiseptic antimicrobial preparation, is active against gram-positive and gram-negative anaerobic and aerobic bacteria: Bacteroides fragilis, Chlamydia spp., Treponema spp., Neisseria gonorrhoeae, Trichomonas spp., Ureaplasma spp.