Federal Register Final rule: FDA is amending the animal drug regulations to reflect approval of an Ivy Laboratories, Division of Ivy Animal Health, Inc. supplemental ANADA that provides for adding tylosin tartrate to an approved subcutaneous implant containing trenbolone and estradiol used for increased rate of weight gain and improved feed efficiency in steers and heifers fed in confinement for slaughter. To view this final rule, click here.
