Abstract
The sulphonamides sulphapyridine and sulphadiazine show novel hydroxy metabolites in the turtle Pseudemys scripta elegans. In the excreta of the turtles the monohydroxy metabolites 4-hydroxy- and 5-hydroxysulphapyridine and the dihydroxy metabolite 4,5-dihydroxysulphapyridine were detected. Of sulphadiazine only dihydroxy metabolites 4,5- and 4,6-dihydroxysulphadiazine were detected. About 70-90% of the dose of sulphapyridine was recovered, while this figure varied between 48 and 69% for sulphadiazine.
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