Enhancement of uricosuric properties of indacrinone by manipulation of the enantiomer ratio
- PMID:7471605
- DOI: 10.1038/clpt.1981.47
Enhancement of uricosuric properties of indacrinone by manipulation of the enantiomer ratio
Abstract
Racemic indacrinone is a high-ceiling, relatively long-acting diuretic. Both enantiomers have uricosuric activity, but the diuretic activity resides predominantly in the (-) enantiomer. Usual therapeutic doses of racemic indacrinone have only transient uricosuric activity, so that, as with other diuretics, hyperuricemia occurs. Sixty-five healthy men participated in a multicenter, double-blind, randomized, balanced, incomplete-block study comparing the effects on plasma urate and urate clearance of indacrinone (-) enantiomer 10 mg given concomitantly with 0, 10, 20, 40, and 80 mg (+) enantiomer (10/0, 10/10, 10/20, 10/40, 10/80), as single daily doses for 7 days. Hydrochlorothiazide (HCTZ) 50 mg daily and ticrynafen (T) 250 mg daily were controls. Each subject received two of the seven treatments, so that there were 18 subjects per treatment. On days 7 to 8, morning (mean of 0-hr values on days 7 and 8), HCTZ, 10/0, 10/10, and 10/20 elevated plasma urate by 8% to 16%. 10/40 was approximately isouricemic, and 10/80 and T lowered plasma urate by 13% and 41%. There were corresponding changes in urate clearance.
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