据美国联邦公报消息，美国FDA将于9月14日发布一项公告，撤销一款兽药（含金霉素、普鲁卡因青霉素、磺胺二甲嘧啶）的许可。
该款兽药用于促进猪生长以及饲料在猪体内的转化率。生产厂商表示，该款兽药不再生产，因此美国FDA撤销该款兽药的许可申请。
部分原文报道如下：
The Food and Drug Administration （FDA） is withdrawing approval of those parts of a new animal drug application （NADA） for a 3-way, fixed-ratio, combination drug Type A medicated article that pertain to use of the procaine penicillin component for production indications in swine. This action is being taken at the sponsor's request because the 3-way Type A medicated article is no longer manufactured.
原文链接：https://www.federalregister.gov/documents/2016/09/14/2016-21984/new-animal-drugs-chlortetracycline-procaine-penicillin-and-sulfamethazine-withdrawal-of-approval
18926578588