Summary
The influence of 600 mg acetylsalicylic acid (ASA) on the renal excretion and clearance of canrenone, the principal unconjugated metabolite of spironolactone, was examined in a double-blind crossover study in six healthy subjects. ASA significantly reduced the urinary excretion, and the fractional excretion, of canrenone between 4 — 6 hours after administration of 50 mg spironolactone. The pharmacological activity of spironolactone, assessed simultaneously by alterations in fludrocortisone-induced urinary electrolyte changes, was slightly but not significantly reduced. The reductions in urinary canrenone excretion correlated with changes in the urinary log 10 Na/K ratio. The results suggest that canrenone may be actively secreted at the proximal renal tubule, and that secretion is blocked by ASA or its conjugates. This is a possible mechanism for the pharmacological interaction between ASA and spironolactone which has been described previously.
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References
Elliott, H.C.: Reduced adrenocortical steroid excretion rates in man following aspirin administration. Metabolism11 1015–1018 (1962)
Tweeddale, M.G., Ogilvie, R.I.: Antagonism of spironolactone-induced natriuresis by aspirin in man. New Engl. J. Med.289 198–200 (1973)
Hollmann, G., Senft, G., Werner, C.: Tubuläre Wirkungen und renale Elimination von Spirolactonen. Naunyn-Schmiedeberg Arch. Exp. Path.247 419–428 (1964)
Weiner, I.M., Mudge, G.H.: Renal tubular mechanisms for excretion of organic acids and bases. Amer. J. Med.36 743–762 (1964)
Schacter, D., Manis, J.G.: Salicylate and salicyl conjugation: fluorimetric estimation, biosynthesis and renal excretion in man. J. clin. Invest.37 800–807 (1958)
Elliott, H.C.: Salicylates: metabolism and biochemical effects. Ala. J. med. Sci.1 38–48 (1964)
Kagawa, C.M., Bouska, D.J., Anderson, M.L.: Relationship of plasma aldadiene levels and anti-mineralocorticoid effects of spironolactone in the laboratory. Proc. Soc. exp. Biol. (N.Y.)115 837–840 (1964)
Sadee, W., Dagcioglu, M., Schroder, R.: Pharmacokinetics of Aldactone in humans. In: Extrarenal activity of aldosterone and its antagonists, pp. 40–42. Amsterdam: Excerpta Medica Foundation 1972
Chasson, A.L., Grady, H.J., Stanley, M.A.: Determination of creatinine by means of automatic chemical analysis. Amer. J. clin. Pathol.35 83–88 (1961)
Gochman, N., Gantt, C.L.: A fluorimetric method for the determination of a major spironolactone (Aldactone) metabolite in human plasma. J. Pharmacol. exp. Ther.135 312–316 (1962)
Johnson, B.B.: Bioassay of adrenal cortical steroids on the basis of electrolyte excretion by rats. Effects of 11-desoxy and 11-oxy steroids. Endocrinology54 196–208 (1954)
Kagawa, C.M.: Adrenocortical antagonists. In: Evaluation of drug activities: pharmacometrics. (ed. Laurence, D.R., Bacharach, A.L.) Vol 2, pp. 745–762. London, New York: Academic Press 1964
Armitage, P.: Statistical methods in medical research. Oxford, London, Edinburgh, Melbourne: Blackwell Scientific Publications 1971
Hofmann, L.M., Krupnick, M.I., Garcia, H.A.: Interactions of spironolactone and hydrochlorothiazide with aspirin in the rat and dog. J. Pharmacol. exp. Ther.180 1–5 (1972)
Gantt, C.L.: Mineralocorticoid steroidal antagonists. Excerpta Medica Int. Congr. Ser.132 591–598 (1966)
Morris, D.J., Davis, R.P.: Aldosterone: current concepts. Metabolism23 473–494 (1974)
Ross, E.J., Bethune, J.E.: Antagonism between the effect of aldosterone and a synthetic steroid lactone on the renal excretion of sodium and potassium in man. Lancet1959 I 127–129
Steiness, E.: Renal tubular secretion of digoxin. Circulation50 103–107 (1974)
Burden, R.P., Booth, L.J., Aber, G.M.: The diagnostic and therapeutic value of spironolactone in patients with systemic hypertension. Nephron9 171–188 (1972)
Kincaid-Smith, P., Fang, P., Laver, M.C.: A new look at the treatment of severe hypertension. Clin. Sci. Mol. Med.45 75s-87s (1973)
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Ramsay, L.E., Harrison, I.R., Shelton, J.R. et al. Influence of acetylsalicylic acid on the renal handling of a spironolactone metabolite in healthy subjects. Eur J Clin Pharmacol 10, 43–48 (1976). https://doi.org/10.1007/BF00561548
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DOI: https://doi.org/10.1007/BF00561548