Broad spectrum antibiotic, a special preparation made with LA technology that can take long effect and prolong the antibiotic activity. Once administrated, the medicine will be released slowly and equally so as to keep the effective plasma drug concentration in the body for 5 days. For treatment of infection caused by Grampositive and Gramnegtive bacteria, as well as Mycoplasma and Rickettsia. Hypersensitivity to tetracycline. Renal or digestive insufficiency. Combination with penicillins or cephalosporins. Do not use in pregnant females(risk of coloration of foatal dental germs). Hypersensitivity reactions, intestinal disturbances may occur after administration. Local tissue reactions after intramuscular injection in horses or foals, and seldom a severe enteritis may occur in horses.