Guidelines of Good Manufacture Practice (GMP)for Veterinary Drugs Manufacturers Article 34

The testing shall be exercised on a non-penicillin product to ensure that there is no contamination of penicillin, hormone, or cephalosporin drugs.
中文原文 動物用藥品優良製造準則第34條
非青黴素類產品,必要時應予檢驗並確定未被青黴素類、荷爾蒙類及頭孢子菌素類藥品污染。

English translation for reference only; the Chinese text prevails. Not legal advice.