Abstract
The possible teratogenic effect of drugs used in veterinary medicine is important for two main reasons: safety for the target animals and residue risks for the consumers of animal products.
The general laws of chemical teratogenesis are: specific sensitivity, smallness of the teratogenic dose, existence of a sensitive period, and single dose effect. They are illustrated by different examples in domestic animals. In most cases (retinol, griseofulvin), the teratogenic doses are obviously higher than the therapeutic ones; on the contrary, in some circumstances (parbendazole, cambendazole), the safety margin is relativley low and requires strict observance of the recommended dosage.
It is pointed out that metabolism is a determining factor of teratogenesis and is related to drug residue toxicity. Yet, it is experimentally possible to distinguish inactive metabolites and teratogenic metabolites that may be present in meat and milk. Consequently, a more appropriate evaluation of risks is possible, compared to the classical method that uses total radioactivity levels. These nitions are illustrated by numerous examples of anthelmintics.
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Delatour, P. Some aspects of the teratogenicity of veterinary drugs. Vet Res Commun 7, 125–131 (1983). https://doi.org/10.1007/BF02228606
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DOI: https://doi.org/10.1007/BF02228606