Oral Dosage Form New Animal Drugs; Chlortetracycline Soluble Powder Concentrate

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by the American Cyanamid Co. The supplemental NADA provides for the safe and effective use of chlortetracycline bisulfate (CTC bisulfate) soluble powder concentrate in the drinking water of chickens and turkeys for control of certain bacterial diseases susceptible to CTC, in the drinking water of swine, and as a drench in cattle for control and treatment of certain bacterial diseases susceptible to CTC. The approved supplemental NADA reflects compliance with findings of the National Academy of Sciences/National Research Council (NAS/NRC), Drug Efficacy Study Group's (DESI) evaluation of related drug products' effectiveness and FDA's conclusions concerning that evaluation.