Effects of two selective serotonin reuptake inhibitor antidepressants, sertraline and escitalopram, on aldosterone/renin ratio in normotensive depressed male patients

Abstract

Background: Plasma aldosterone to renin ratio (ARR) is the most popular screening test for primary aldosteronism (PAL). Certain medications are known to cause false-negative or -positive ARRs by affecting renin and aldosterone levels. There are no previously published data on the effects of antidepressants on ARR. Methods: Normotensive, depressed male patients (n.26) underwent measurement (seated, midmorning) of plasma aldosterone, direct renin concentration (DRC), renin activity (PRA), electrolytes and creatinine and urinary aldosterone, cortisol, electrolytes, and creatinine at baseline and after 2 and 6 wk treatment with sertraline (n . 14) or escitalopram (n . 12). Results: For both antidepressants, treatment was associated with rises in aldosterone [sertraline: baseline, mean ± SD, 243 ± 34; 2 wk, 256 ± 33; 6 wk, 267 ± 34 pmol/liter (P < 0.01 by ANOVA); escitalopram, 261±36, 269±38, 282±40 pmol/liter (P<0.05)], DRC [19.5±2.2, 33.5±2.0, 39.0± 2.4 mU/liter (P<0.001); 24.5±2.4, 34.0±2.7, 42.8±2.4 mU/liter (P<0.001)], and PRA [2.24±0.21, 2.58 ± 0.26, 4.68 ± 0.42 ng/ml . h (P < 0.001); 4.31 ± 0.22, 5.57 ± 0.36, 6.42 ± 0.53 ng/ml . h (P < 0.001)]. ARR fell significantly whether calculated using DRC [sertraline, 13.7 ± 2.2, 7.5 ± 0.7, 6.8 ± 0.7 (P < 0.001); escitalopram, 11.5 ± 1.9, 8.0 ± 1.1, 6.6 ± 1.0 (P < 0.001)], or PRA [116.6 ± 15.8, 108.4 ± 15.6, 60.4 ± 6.2 (P < 0.001); 61.2 ± 8.1, 50.0 ± 7.7, 45.6 ± 6.0 (P < 0.01)].Conclusion: Selective serotonin reuptake inhibitor antidepressants can significantly reduce ARR and therefore potentially increase the risk of false-negative resultswhenscreening for PAL. Further studies in hypertensive patients, including patients with confirmed PAL, are required. Copyright © 2011 by The Endocrine Society.