Chemical substances commonly used in veterinary medicines

3 Chemical substances commonly used in veterinary medicines 

The tetracyclines (Fig. 6.3) are a large family of related compounds. They were developed after the penicillins and sulphonamides. The first of these 

The first of these compounds to be used in animal medicines, Tylosin, was isolated from Streptomyces fradiae. Its chemical structure which is typical of this group of compounds, is based on a lactone ring to which carbohydrate 

Anabolic agents used in veterinary medicine are naturally occurring steroids. They are no longer permitted for use as growth promoters in the European 

Community. The administration of hormone growth promoters was prohibited because of fears about health effects from residues, although there is a need to standardise conditions of trade in animal products from countries outside the EU where these compounds are still licensed for use. The use of one particular group of synthetic anabolic agents with oestrogenic activity, the stilbene compounds, 

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