Brand Names:
Ronaxan, Steriject

Drug Type: Antibiotic


Doxycycline is a tetracycline antibiotic used to treat many different bacteria infections, such as urinary tract infections, intestinal infections, eye infections, and others in poultry. Some forms of doxycycline are used to prevent malaria, to treat anthrax, or to treat infections caused by mites, ticks, or lice.

Caution: Prolonged treatment can have catabolic and immunosuppressive effects, reduce normal gut flora, and increases the risk of opportunistic secondary infections. Birds with existing liver or kidney disease should be closely observed when given this medication.

Typical Dosage:
  • As an oral suspension: 20 mg/kg given orally once a day, for 3 consecutive days.
  • In drinking water: 100 mg/L

Egg Withdrawal Period: Doxycycline is not approved for use in poultry producing eggs intended for human consumption in any country. However, multiple studies have been performed to evaluate the depletion of doxycycline in the eggs of treated hens. It is associated with a 7-day withdrawal period for chickens intended for 'meat purposes'.
  • Photosensitivity
  • Decreased immunity
  • Disruption of normal gut flora
  • More susceptible to infection with secondary pathogens.
  • Cardiac arrhythmias
  • Vision changes
  • Difficulty breathing
  • Diarrhea