As with medicated feeds, "current good manufacturing practice" regulations exist for Type A medicated article/drug premixes. Since premix manufacturers and basic drug manufacturers are already quite familiar with the CGMP regulations for Type A medicated articles, this article is directed at the newer drug premixer and the feed manufacturer who may be considering production of Type A medicated articles. Where appropriate, comparisons are made with the feed CGMP regulations discussed in the precedingarticle. Type A medicated articles are drug premixes of specific potency whose primary function is to serve as a drug source for producing medicated feeds — i.e., Type B and C medicated feeds. High potency Type A articles can also be used to produce lower potency Type Aproducts. As drug premixes, however, all Type A products are concentrated sources of drugs. With some technical exceptions, an approved New Animal Drug Application (NADA), or form FD-356, is required to produce a Type A product.
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