Doxycycline is a semisynthetic tetracycline derivative (oxytetracycline derivative). Active against gram-positive and gram-negative microorganisms, incl. Actinobacillus pleuropneumoniae, Clostridium spp., Escherichia coli, Staphylococcus spp., Streptococcus spp., Haemophilus spp., Pasteurella spp., As well as Mycoplasma spp., Rickettsia spp., Chlamydia spp. Proteus, Pseudomonas aeruginosa, pathogenic fungi are not sensitive to the veterinary medicinal product.
The mechanism of the bacteriostatic action of the antibiotic -it exerts its action by inhibiting the protein synthesis by reversible binding to the 30S ribosomal subunit of microorganisms sensitive to the veterinary medicinal product.
Doxycycline is well absorbed into the bloodstream from the gastrointestinal tract and widely distributed in the organisms. The maximum concentration of the antibiotic in the blood serum is reached after 2-4 hours and is maintained at a therapeutic level for at least 18-24 hours after using the veterinary medicinal product.
Doxycycline is excreted primarily in faeces and in urine, in poultry – in eggs.