Doxycycline is a broad-spectrum antibacterial medication of the tetracycline class. It has been on the market since it was approved by the Food and Drug Administration (FDA) in the 1960s.
Florfenicol is a fluorinated, synthetic analog of thiamphenicol and is mainly used in veterinary medicine. It is a broad-spectrum antibacterial that is active against all organisms sensitive to chloramphenicol, gram-positive cocci, gram-negative bacilli,