RT Journal Article SR Electronic T1 PHARMACOLOGY OF BENZYDROFLUMETHIAZIDE (NATURETIN) JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 273 OP 280 VO 134 IS 3 A1 J. J. Piala A1 J. W. Poutsiaka A1 B. N. Craver A1 J. C. Burke A1 C. I. Smith YR 1961 UL http://jpet.aspetjournals.org/content/134/3/273.abstract AB Benzydroflumethiazide (BHFT) was the most potent of 5 benzothiadiazines studied in rats and dogs. In dogs, moreover, BHFT had a lower clearance rate, a longer half-life in plasma, and a longer duration of action than dihydroflumethiazide. In accord with its very low in vitro carbonic anhydrase inhibitory activity, BHFT did not increase the urinary excretion of bicarbonate. Large intravenous doses caused hypotension in dogs but produced no other significant cardiovascular or autonomic effects and no change in glomerular filtration rate. This compound was lethal in mice only at exceptionally large oral or parenteral doses. In dogs, very large doses given over many weeks lowered moderately the potassium concentrations in the serum but did not produce major electrolyte imbalances.