Bacteriostatic antibiotic from the group of tetracyclines. It disrupts the formation of a complex between the transport RNA and the ribosome, which leads to a violation of protein synthesis.
Active against gram-positive and gram-negative microorganisms - Staphylococcus aureus, Streptococcus pyogenes, Streptococcus pneumoniae, Neisseria gonorrhoeae, Haemophilus influenzae, Haemophilus ducreyi, Klebsiella pneumoniae, Francisella tularensis (Pasteurella pestis), Escherichia coli, Bacillus anthracis, and Chlamydia trachomatis.
Inactive for some strains Haemophilus influenzae, Klebsiella spp., Aerobacter spp., Pseudomonas aeruginosa, Serratia marcescens.