Comparison of the disposition and of the metabolic pattern of Reboxetine, a new antidepressant, in the rat, dog, monkey and man. |
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Authors: | G Cocchiara R Battaglia P Pevarello M Strolin Benedetti |
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Institution: | Farmitalia Carlo Erba R&D, Erbamont Group, Milan, Italy. |
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Abstract: | The purpose of this study was to compare the disposition and the metabolic pattern of Reboxetine in several species, including man. 14C]-Reboxetine was given orally to the rat, the dog, the monkey (5 mg/kg) and man (2 and 4 mg/kg). Radioactivity was eliminated both by the renal and faecal route in the rat and the dog, mainly in urine in the monkey and man. Reboxetine was extensively metabolized. A number of urinary metabolites were quantified by radio-HPLC and tentatively identified by comparison with the retention times of reference compounds. Suggested routes of metabolic transformation are: 2-O-dealkylation; hydroxylation of the ethoxyphenoxy ring; oxidation of the morpholine ring; morpholine ring-opening; and combinations of these. Metabolites were partially or completely conjugated with glucuronic acid and/or sulphuric acid. |
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