Oxytetracycline belongs to the group of tetracyclines and has bacteriostatic action against many Gram-positive and Gram-negative bacteria like
Bordetella spp.,
Campylobacter spp.,
Chlamydia spp.,
E. coli,
Haemophilus spp.,
Mycoplasma spp.,
Pasteurella spp.,
Rickettsia spp.,
Salmonella spp.,
Staphylococcus spp. and
Streptococcus spp. The action of oxytetracycline is based on inhibition of bacterial protein synthesis. Oxytetracycline is mainly excreted in urine, for a small part in bile and in lactating animals in milk.