RT Journal Article SR Electronic T1 Absorption, excretion and disposition of cyclindole in laboratory animals and human volunteers. JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 239 OP 245 VO 5 IS 3 A1 D P Benziger A1 K Balfour A1 S Clemans A1 J Edelson YR 1977 UL http://dmd.aspetjournals.org/content/5/3/239.abstract AB Radioactivity from orally administered single doses of cyclindole-14C was excreted primarily in the urine of the rat (99%/48 hr), monkey (80%/120 hr), and dog (70%/144 hr). Approximately 38-58% of a daily dose of cyclindole was recovered from 24-hr human urine, as determined by gas chromatography. Substantial amounts of unchanged drug were voided by dogs. Cyclindole was metabolized primarily by N-demethylation and/or hydroxylation in the 7-position. Hydroxylation at the 6-carbon atom was of minor importance in humans only; none of the animal species excreted the 6-hydroxy metabolite. Dogs were capable of N-demethylation, but no metabolites oxidized at the 6- or 7-carbon atoms were detected in dog urine.