Oxytetracycline is a broad-spectrum tetracycline antibiotic with CAS number 79-57-2. It works by inhibiting bacterial protein synthesis, effectively combating Gram-positive/Gram-negative bacteria, mycoplasmas, rickettsiae, and other microorganisms. Its primary uses include treating zoonotic respiratory, urinary tract, and skin infections in humans and animals, as well as serving as a feed additive to promote animal growth. This product is a yellow crystalline powder that is slightly soluble in water and should be stored away from light. It should be used as directed by a healthcare professional, and should not be taken with dairy products or medications containing calcium/magnesium to avoid affecting absorption. Prolonged misuse may lead to antibiotic resistance, so dosage must be strictly controlled. When used in agriculture and aquaculture, the withdrawal period regulations must be followed.