Brand Names:
Tetra, Nu-Tetra, Novo-Tetra

Drug Type: Antibiotic


Tetracycline is a broad-spectrum bacteriostatic agent that works by inhibiting protein synthesis. Other similar drugs include Chlortetracycline, Oxytetracycline, and Doxycycline. Tetracyclines have activity against gram-positive and gram-negative bacteria, including some anaerobes. It is also active against Chlamydia, Mycoplasmas, and some protozoa, and several rickettsiae. Specific bacteria within the tetracycline's activity range include Escherichia coli, Klebsiella spp, Pasteurella spp, Salmonella spp, Staphylococcus spp, and Streptococcus spp.

Tetracycline should only be administered orally, because it is poorly absorbed if administered via IM. It can be added to the flock's drinking water or feed. The half-life elimination for tetracycline in chickens is 2.8 hours.

Storage/Stability: Unless otherwise instructed by the manufacturer, tetra­cycline oral tablets and capsules should be stored in tight, light resistant containers at room temperature (15-30°C). The oral suspension should be stored at room temperature. Avoid freezing.
  • 50 mg/kg PO q8h
  • 40-200 mg/L drinking water
  • 100-600 mg/kg feed
  • Calcium
  • Sodium bicarbonate: Concurrent use with tetracyclines may result in formation of non-absorbable complexes; also, concurrent use within 1 to 3 hours of administering may result in decreased absorption of oral tetracyclines because of increased intragastric pH.